CN105388149A - Reagent and method for fast detecting water quality total hardness - Google Patents
Reagent and method for fast detecting water quality total hardness Download PDFInfo
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- CN105388149A CN105388149A CN201510713571.4A CN201510713571A CN105388149A CN 105388149 A CN105388149 A CN 105388149A CN 201510713571 A CN201510713571 A CN 201510713571A CN 105388149 A CN105388149 A CN 105388149A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000003153 chemical reaction reagent Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 80
- 239000000243 solution Substances 0.000 claims abstract description 22
- 239000012085 test solution Substances 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 66
- WMFOQBRAJBCJND-UHFFFAOYSA-M lithium hydroxide Inorganic materials [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 33
- VBRNLOQCBCPPHL-UHFFFAOYSA-N calmagite Chemical compound CC1=CC=C(O)C(N=NC=2C3=CC=CC=C3C(=CC=2O)S(O)(=O)=O)=C1 VBRNLOQCBCPPHL-UHFFFAOYSA-N 0.000 claims description 14
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 claims description 14
- 229940012189 methyl orange Drugs 0.000 claims description 14
- IFRDBGYJSLDMHQ-UHFFFAOYSA-J magnesium;disodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate;hydrate Chemical group O.[Na+].[Na+].[Mg+2].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O IFRDBGYJSLDMHQ-UHFFFAOYSA-J 0.000 claims description 13
- 229910021538 borax Inorganic materials 0.000 claims description 10
- 239000007853 buffer solution Substances 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 10
- 239000004328 sodium tetraborate Substances 0.000 claims description 10
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- SXYCCJAPZKHOLS-UHFFFAOYSA-N chembl2008674 Chemical compound [O-][N+](=O)C1=CC=C2C(N=NC3=C4C=CC=CC4=CC=C3O)=C(O)C=C(S(O)(=O)=O)C2=C1 SXYCCJAPZKHOLS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 239000012488 sample solution Substances 0.000 claims description 4
- JCYPECIVGRXBMO-UHFFFAOYSA-N 4-(dimethylamino)azobenzene Chemical compound C1=CC(N(C)C)=CC=C1N=NC1=CC=CC=C1 JCYPECIVGRXBMO-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- CEQFOVLGLXCDCX-WUKNDPDISA-N methyl red Chemical compound C1=CC(N(C)C)=CC=C1\N=N\C1=CC=CC=C1C(O)=O CEQFOVLGLXCDCX-WUKNDPDISA-N 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000012475 sodium chloride buffer Substances 0.000 claims description 3
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 3
- 239000012498 ultrapure water Substances 0.000 claims description 3
- 239000003651 drinking water Substances 0.000 abstract description 4
- 235000020188 drinking water Nutrition 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000002352 surface water Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000004043 dyeing Methods 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 22
- 238000002360 preparation method Methods 0.000 description 18
- 239000003086 colorant Substances 0.000 description 15
- 239000012086 standard solution Substances 0.000 description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 6
- 229940005654 nitrite ion Drugs 0.000 description 6
- 238000013112 stability test Methods 0.000 description 6
- 238000004587 chromatography analysis Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 4
- 238000013459 approach Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229940071106 ethylenediaminetetraacetate Drugs 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000005770 birds nest Nutrition 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011981 development test Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 235000005765 wild carrot Nutrition 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1853—Hardness of water
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a reagent and method for fast detecting water quality total hardness. The reagent for fast detecting the water quality total hardness comprises an indicator, a dyeing assisting agent and a sensitizer with the mass ratio of (35-50):(18-22):(25-37). The method for detecting the water quality total hardness comprises the following steps that 1, filter paper is immersed in a solution prepared from the reagent for fast detecting the water quality total hardness, soaked and dried, and water quality total hardness fast detecting test paper is obtained; 2, the water quality total hardness fast detecting test paper is immersed in a test solution prepared from a sample to be tested, and taken out after two seconds, the excessive solution on the test paper is thrown away, after color developing is complete, the standard colourimetric card is compared, and the water quality total hardness is obtained. The reagent for fast detecting the water quality total hardness is high in sensitivity, good in stability, easy and convenient to operate, economical and practical. The detecting method can fast detect the water quality total hardness on site, response time is short, testing speed is high, and the testing method can be used for fast testing the total hardness of drinking water, boiler water, alkaline mineral water, surface water, underground water, industrial consumption, waste water and the like.
Description
Technical field
The present invention relates to a kind of determining total hardness of water quick detection reagent and detection method, belong to analytical chemistry field.
Background technology
Water hardness is an important monitoring index of water quality, and water hardness is too high, can produce harm to health, daily life, commercial production etc.All certain regulation is had to determining total hardness of water in the various water quality standard such as Industrial Boiler water and condensate water, Drinking Water, underground water.In addition, hospital's blood dialysis room water also has strict requirement to determining total hardness of water.Water hardness is too high is the main cause forming bird nest, the too high quality that also can affect Related product of water hardness.Therefore, the mensuration of calcium, magnesium total amount in the total hardness of water and water, can for providing foundation with quality and water treatment.
The assay method of the water hardness is numerous, but majority will carry out in the lab, as: EDTA compleximetry, spectrophotometric method, atomic absorption method, red, orange, green, blue, yellow (ROGBY), electrochemical process etc., the method carrying out on-the-spot on-line analysis is less, and the analytical approach also non-popularization and application of energy Simultaneously test multiple element content.Along with the development of Modern Analytical Chemistry, the limitation of traditional water hardness analytical approach in analysis efficiency, analysis ability is more and more obvious, and the application in Complex water body system anlysis is restricted.By tradition, the analytical approach of maturation is microminiaturized, integrated, robotization and commercialization can further improve efficiency, and being conducive to popularizing of analytical technology, is also an extremely potential research direction in present analysis science.At present, determining total hardness of water Quick Measuring trial product has great competitive edge in express-analysis at the scene, wherein total hardness quick detection test paper is studied comparatively early abroad, and all there are many ripe products (comprising high range and lower range) in the international renowned company in the water quality such as Merck and MN express-analysis field.External product structure design is reasonable, and product category is enriched, and dependable performance, advanced technology, home products by comparison gap is fairly obvious.The Quick Measuring trial product of domestic titration class is more, and test paper series products is less, and generally only arranges a range, and the quality of test paper series products is nothing like imported product.
The drinking water standard method of inspection (GB/T5750.4-2006) and boiler feed water and chilled water analytical approach (GB6909.1-86) all regulation Hardness Determination method are take eriochrome black T as disodium ethylene diamine tetraacetate (EDTA) compleximetry of indicator.This method needs preparation EDTA standard solution, chromium black T indicator solution, ammonia-sal-ammoniac buffer solution, needs special assay laboratory and specialty analysis laboratory personnel, cannot realize field quick detection.This invention exploits a kind of total hardness quick detection reagent, can by this reagent load on filter paper, be prepared into test paper for detecting total hardness of water, when carrying out determining total hardness of water and detecting, only this Test paper need be immersed in sample and take out after 2 seconds, reference standard colorimetric card, determining total hardness of water data can be obtained, whole testing process only needs 15 seconds, and process simplifies greatly, and the on-the-spot semiquantitative determination for the determining total hardness of water such as process water and Drinking Water has great significance.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of determining total hardness of water quick detection reagent and detection method are provided.
The technical solution used in the present invention is:
A kind of determining total hardness of water quick detection reagent, its component comprises indicator, assistant toner and sensitizer, and the mass ratio of described indicator, assistant toner and sensitizer is (35 ~ 50): (18 ~ 22): (25 ~ 37).
Further, the component of described detection reagent also includes pH stabilizing agent.
The pH value of sample solution can be stabilized between 9 ~ 11 by described pH stabilizing agent.
Described pH stabilizing agent is the one in borax-lithium hydroxide buffer system, ammonia-sal-ammoniac buffer system, NaOH-boric acid-potassium chloride buffer system, NaOH-glycocoll-sodium chloride buffer system.
Described indicator is at least one in acid chromium blue k-naphthol green B, eriochrome black T, calmagite.
Described assistant toner is at least one in methyl orange, methyl yellow, methyl red.
Described sensitizer is ethylenediamine tetraacetic acid disodium magnesium salt.
Further, a kind of determining total hardness of water quick detection reagent, its component comprises calmagite, methyl orange, ethylenediamine tetraacetic acid disodium magnesium salt, borax and lithium hydroxide, and the mass ratio of described calmagite, methyl orange, ethylenediamine tetraacetic acid disodium magnesium salt, borax and lithium hydroxide is (35 ~ 50): (18 ~ 22): (25 ~ 37): (3810 ~ 7630): (0 ~ 120).
A kind of determining total hardness of water detection method, comprises the following steps:
1) by determining total hardness of water quick detection reagent and solvent mixing, be mixed with solution, filter paper immersed in this solution, take out after soaking 5 ~ 30min, dry, obtain determining total hardness of water quick detection test paper;
2), in the test solution made by determining total hardness of water Fast Measurement test paper immersion testing sample, take out after 2 seconds, get rid of solution unnecessary on test paper, after colour developing completely, reference standard colorimetric card, obtains determining total hardness of water.
Solvent described in step 1) is at least one in deionized water, distilled water, ultrapure water.
The invention has the beneficial effects as follows:
1) high, the good stability of detection reagent sensitivity of the present invention, easy and simple to handle, economical and practical;
2) detection method energy field quick detection determining total hardness of water of the present invention, the response time is fast, and test speed is fast, the reagent dosage of single test only has more than one percent of usual laboratory methods, test process is simple, without the need to Other Instruments and accessory, greatly can save testing cost;
3) the determining total hardness of water quick detection test paper adopting detection reagent of the present invention to prepare, the airtight preservation of lucifuge under room temperature condition, the shelf-life, the area of test paper was little more than 12 months, was easy to carry, economical and practical;
4) the present invention can be widely used in the Fast Measurement of the determining total hardness of water such as Drinking Water and source water, boiler water, mineral water, surface water, underground water, process water, waste water.
Accompanying drawing explanation
Fig. 1 is the view of the standard color comparison card 1# of embodiment 1.
Embodiment
A kind of determining total hardness of water quick detection reagent, its component comprises indicator, assistant toner and sensitizer, and the mass ratio of described indicator, assistant toner and sensitizer is (35 ~ 50): (18 ~ 22): (25 ~ 37).
Preferably, the component of described detection reagent also includes pH stabilizing agent.
Preferably, the pH value of sample solution can be stabilized between 9 ~ 11 by described pH stabilizing agent.
Preferably, described pH stabilizing agent is the one in borax-lithium hydroxide buffer system, ammonia-sal-ammoniac buffer system, NaOH-boric acid-potassium chloride buffer system, NaOH-glycocoll-sodium chloride buffer system.
Preferably, described indicator is at least one in acid chromium blue k-naphthol green B, eriochrome black T, calmagite.
Preferred further, described indicator is calmagite.
Preferably, described assistant toner is at least one in methyl orange, methyl yellow, methyl red.
Preferred further, described assistant toner is methyl orange.
Preferably, described sensitizer is ethylenediamine tetraacetic acid disodium magnesium salt.
Preferably, a kind of determining total hardness of water quick detection reagent, its component comprises calmagite, methyl orange, ethylenediamine tetraacetic acid disodium magnesium salt, borax and lithium hydroxide, and the mass ratio of described calmagite, methyl orange, ethylenediamine tetraacetic acid disodium magnesium salt, borax and lithium hydroxide is (35 ~ 50): (18 ~ 22): (25 ~ 37): (3810 ~ 7630): (0 ~ 120).
A kind of determining total hardness of water detection method, comprises the following steps:
1) by determining total hardness of water quick detection reagent and solvent mixing, be mixed with solution, filter paper immersed in this solution, take out after soaking 5 ~ 30min, dry, obtain determining total hardness of water quick detection test paper;
2), in the test solution made by determining total hardness of water Fast Measurement test paper immersion testing sample, take out after 2 seconds, get rid of solution unnecessary on test paper, after colour developing completely, reference standard colorimetric card, obtains determining total hardness of water.
Preferably, the solvent described in step 1) is at least one in deionized water, distilled water, ultrapure water.
Preferably, the filter paper described in step 1) is the one in chromatography filter paper, qualitative filter paper, quantitative filter paper.
Preferably, the preparation method of described standard color comparison card comprises the following steps:
1) with pure water compound concentration be the calcium carbonate standard solution of 25mg/L, determining total hardness of water quick detection test paper is immersed in standard solution, takes out after 2 seconds, get rid of unnecessary solution, after the colour stable that test paper presents, PMS is found out corresponding standard colors;
2) with method described in step 1), the standard colors that during to obtain detectable concentration be respectively 0mg/L, 50mg/L, 120mg/L, 250mg/L, 425mg/L calcium carbonate standard solution, test paper presents;
3) contrast the colour that PMS obtains each standard colors, by computer color-mixed and printing, obtain standard color comparison card.
Below in conjunction with specific embodiment, the present invention is made further explanation and description.
embodiment 1:
the preparation of determining total hardness of water quick detection test paper:
With the mixing nitrite ion of pure water preparation containing 0.50g/L calmagite, 0.22g/L methyl orange, 0.37g/L ethylenediamine tetraacetic acid disodium magnesium salt, 0.10mol/L borax.Chromatography filter paper to be dipped to completely in above-mentioned mixed liquor about 10 minutes, take out filter paper, vacuum drying at 75 DEG C of temperature, is cut into the fritter of 5 × 6mm by this filter paper, stick with glue the base plate one end at 5 × 80mm strip, obtain determining total hardness of water quick detection test paper 1#.
the preparation of standard color comparison card:
1) with pure water compound concentration be the calcium carbonate standard solution of 25mg/L, the determining total hardness of water quick detection test paper of preparation is immersed in solution, take out after 2 seconds, get rid of unnecessary solution, the color presented according to test paper after 15 seconds finds out the consistent standard colors of tone on PMS;
2) with method described in step 1), the standard colors that during to obtain detectable concentration be respectively 0mg/L, 50mg/L, 120mg/L, 250mg/L, 425mg/L calcium carbonate standard solution, test paper presents;
3) lead to colour listed by standard colors according to each Pan obtained adopt computer color-mixed and print, obtain standard color comparison card 1#(as shown in Figure 1).
embodiment 2:
the preparation of determining total hardness of water quick detection test paper:
With the mixing nitrite ion of pure water preparation containing 0.45g/L calmagite, 0.20g/L methyl orange, 0.35g/L ethylenediamine tetraacetic acid disodium magnesium salt, 0.14mol/L borax, 0.015mol/L lithium hydroxide.Chromatography filter paper to be dipped to completely in above-mentioned mixed liquor about 10 minutes, take out filter paper, vacuum drying at 75 DEG C of temperature, is cut into the fritter of 5 × 6mm by this filter paper, stick with glue the base plate one end at 5 × 80mm strip, obtain determining total hardness of water quick detection test paper 2#.
the preparation of standard color comparison card:
1) with pure water compound concentration be the calcium carbonate standard solution of 25mg/L, the determining total hardness of water quick detection test paper of preparation is immersed in solution, take out after 2 seconds, get rid of unnecessary solution, the color presented according to test paper after 15 seconds finds out the consistent standard colors of tone on PMS;
2) with method described in step 1), the standard colors that during to obtain detectable concentration be respectively 0mg/L, 50mg/L, 120mg/L, 250mg/L, 425mg/L calcium carbonate standard solution, test paper presents;
3) lead to colour listed by standard colors according to each Pan obtained adopt computer color-mixed and print, obtain standard color comparison card 2#.
embodiment 3:
the preparation of determining total hardness of water quick detection test paper:
With the mixing nitrite ion of pure water preparation containing 0.40g/L calmagite, 0.19g/L methyl orange, 0.32g/L ethylenediamine tetraacetic acid disodium magnesium salt, 0.16mol/L borax, 0.035mol/L lithium hydroxide.Chromatography filter paper to be dipped to completely in above-mentioned mixed liquor about 10 minutes, take out filter paper, vacuum drying at 75 DEG C of temperature, is cut into the fritter of 5 × 6mm by this filter paper, stick with glue the base plate one end at 5 × 80mm strip, obtain determining total hardness of water quick detection test paper 3#.
the preparation of standard color comparison card:
1) with pure water compound concentration be the calcium carbonate standard solution of 25mg/L, the determining total hardness of water quick detection test paper of preparation is immersed in solution, take out after 2 seconds, get rid of unnecessary solution, the color presented according to test paper after 15 seconds finds out the consistent standard colors of tone on PMS;
2) with method described in step 1), the standard colors that during to obtain detectable concentration be respectively 0mg/L, 50mg/L, 120mg/L, 250mg/L, 425mg/L calcium carbonate standard solution, test paper presents;
3) lead to colour listed by standard colors according to each Pan obtained adopt computer color-mixed and print, obtain standard color comparison card 3#.
embodiment 4:
the preparation of determining total hardness of water quick detection test paper:
With the mixing nitrite ion of pure water preparation containing 0.35g/L calmagite, 0.18g/L methyl orange, 0.25g/L ethylenediamine tetraacetic acid disodium magnesium salt, 0.20mol/L borax, 0.050mol/L lithium hydroxide.Chromatography filter paper to be dipped to completely in above-mentioned mixed liquor about 10 minutes, take out filter paper, vacuum drying at 75 DEG C of temperature, is cut into the fritter of 5 × 6mm by this filter paper, stick with glue the base plate one end at 5 × 80mm strip, obtain determining total hardness of water quick detection test paper 4#.
the preparation of standard color comparison card:
1) with pure water compound concentration be the calcium carbonate standard solution of 25mg/L, the determining total hardness of water quick detection test paper of preparation is immersed in solution, take out after 2 seconds, get rid of unnecessary solution, the color presented according to test paper after 15 seconds finds out the consistent standard colors of tone on PMS;
2) with method described in step 1), the standard colors that during to obtain detectable concentration be respectively 0mg/L, 50mg/L, 120mg/L, 250mg/L, 425mg/L calcium carbonate standard solution, test paper presents;
3) lead to colour listed by standard colors according to each Pan obtained adopt computer color-mixed and print, obtain standard color comparison card 4#.
test case 1:
the stability test of determining total hardness of water quick detection test paper:
Determining total hardness of water quick detection test paper 1# ~ 4# is loaded sealing bag, is placed in 37 DEG C of baking ovens, observed test paper outward appearance every 30 days, and carry out test paper color development test, the stability test result of test paper 1# ~ 4# is as shown in table 1 ~ 4.
The stability test result of table 1 determining total hardness of water quick detection test paper 1#:
The stability test result of table 2 determining total hardness of water quick detection test paper 2#:
The stability test result of table 3 determining total hardness of water quick detection test paper 3#:
The stability test result of table 4 determining total hardness of water quick detection test paper 4#:
From table 1 ~ 4, the determining total hardness of water quick detection test paper 1# ~ 4# of embodiment 1 ~ 4 placed after 90 days in 37 DEG C of baking ovens, and outward appearance and colour developing are all normal, illustrate that the stability of this test paper is fine, the held formula base plate of test paper can avoid in the process of taking that sample is by people's hand contamination, reliably fool proof.
The determining total hardness of water quick detection test paper 3# choosing embodiment 3 detects the total hardness of water sample, and after measured, the response time is less than 5 seconds, color Absorbable organic halogens 3 minutes after colour developing completely, illustrates that detection method test speed of the present invention is fast, good stability.
test case 2:
the Detection results test of determining total hardness of water quick detection test paper:
Choose sample 1 ~ 12, adopt the determining total hardness of water quick detection test paper 3# of embodiment 3 to carry out total hardness test effect control experiment.Prepare the calcium carbonate sample solution of a series of variable concentrations, adopt F-HZ-HJ-SZ-0015 standard " mensuration-EDTA titrimetry of water quality-calcium and magnesium total amount " and this test paper method to carry out the mensuration of concentration respectively.During test paper method test, when the tone of sample nitrite ion is consistent with standard color range, directly getting color range instruction concentration is measured value, if color is inconsistent, the tone with regard to nitrite ion per sample chooses two adjacent standard color ranges, obtains sample concentration scope.Test result is as shown in table 5.
Effect Comparability test result tested by table 5:
As shown in Table 5: determining total hardness of water quick detection reagent of the present invention load is prepared into total hardness quick detection test paper on filter paper, carry out the Fast Measurement of total hardness, without the need to any other instrument and accessory, easy and simple to handle, sensing range is wide, reliable results, has higher using value.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. a determining total hardness of water quick detection reagent, its component comprises indicator, assistant toner and sensitizer, and the mass ratio of described indicator, assistant toner and sensitizer is (35 ~ 50): (18 ~ 22): (25 ~ 37).
2. detection reagent according to claim 1, is characterized in that: the component of described detection reagent also includes pH stabilizing agent.
3. detection reagent according to claim 2, is characterized in that: the pH value of sample solution can be stabilized between 9 ~ 11 by described pH stabilizing agent.
4. the detection reagent according to Claims 2 or 3, is characterized in that: described pH stabilizing agent is the one in borax-lithium hydroxide buffer system, ammonia-sal-ammoniac buffer system, NaOH-boric acid-potassium chloride buffer system, NaOH-glycocoll-sodium chloride buffer system.
5. detection reagent according to claim 1, is characterized in that: described indicator is at least one in acid chromium blue k-naphthol green B, eriochrome black T, calmagite.
6. detection reagent according to claim 1, is characterized in that: described assistant toner is at least one in methyl orange, methyl yellow, methyl red.
7. detection reagent according to claim 1, is characterized in that: described sensitizer is ethylenediamine tetraacetic acid disodium magnesium salt.
8. detection reagent according to claim 1, it is characterized in that: its component comprises calmagite, methyl orange, ethylenediamine tetraacetic acid disodium magnesium salt, borax and lithium hydroxide, the mass ratio of described calmagite, methyl orange, ethylenediamine tetraacetic acid disodium magnesium salt, borax and lithium hydroxide is (35 ~ 50): (18 ~ 22): (25 ~ 37): (3810 ~ 7630): (0 ~ 120).
9. a determining total hardness of water detection method, is characterized in that: comprise the following steps:
1) by determining total hardness of water quick detection reagent and solvent mixing, be mixed with solution, filter paper immersed in this solution, take out after soaking 5 ~ 30min, dry, obtain determining total hardness of water quick detection test paper;
2), in the test solution made by determining total hardness of water Fast Measurement test paper immersion testing sample, take out after 2 seconds, get rid of solution unnecessary on test paper, after colour developing completely, reference standard colorimetric card, obtains determining total hardness of water.
10. detection method according to claim 9, is characterized in that: the solvent described in step 1) is at least one in deionized water, distilled water, ultrapure water.
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| CN106404767A (en) * | 2016-08-30 | 2017-02-15 | 孙逊 | Cotton swab for fast determining whether total hardness of water reaches standard |
| CN106404783A (en) * | 2016-09-29 | 2017-02-15 | 网易（杭州）网络有限公司 | Test paper detection method and device |
| CN107862350A (en) * | 2016-09-29 | 2018-03-30 | 网易（杭州）网络有限公司 | Test paper detecting method, apparatus and system |
| CN108333296A (en) * | 2018-01-26 | 2018-07-27 | 山东五洲检测有限公司 | A kind of determining total hardness of water detection agent and preparation method thereof |
| CN110726718A (en) * | 2019-11-05 | 2020-01-24 | 长春万成生物电子工程有限公司 | Test paper for detecting water hardness, preparation method and detection method thereof |
| CN112577914A (en) * | 2020-11-18 | 2021-03-30 | 上海仪电科学仪器股份有限公司 | Water hardness determination method |
| CN114018911A (en) * | 2021-11-08 | 2022-02-08 | 河海大学 | Test bar for rapidly detecting content of manganese ions in water and preparation method and application thereof |
| CN114441524A (en) * | 2022-02-14 | 2022-05-06 | 上海蓝长自动化科技有限公司 | Water hardness determination reagent combined with continuous flow analyzer |
| US11498069B2 (en) | 2020-08-31 | 2022-11-15 | International Business Machines Corporation | Rapid testing device for wastewater analysis |
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| CN110726718A (en) * | 2019-11-05 | 2020-01-24 | 长春万成生物电子工程有限公司 | Test paper for detecting water hardness, preparation method and detection method thereof |
| US11498069B2 (en) | 2020-08-31 | 2022-11-15 | International Business Machines Corporation | Rapid testing device for wastewater analysis |
| CN112577914A (en) * | 2020-11-18 | 2021-03-30 | 上海仪电科学仪器股份有限公司 | Water hardness determination method |
| CN114018911A (en) * | 2021-11-08 | 2022-02-08 | 河海大学 | Test bar for rapidly detecting content of manganese ions in water and preparation method and application thereof |
| CN114441524A (en) * | 2022-02-14 | 2022-05-06 | 上海蓝长自动化科技有限公司 | Water hardness determination reagent combined with continuous flow analyzer |
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