CN1087723A - The quick determining method for hardness of boiler water and determining instrument thereof - Google Patents
The quick determining method for hardness of boiler water and determining instrument thereof Download PDFInfo
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- CN1087723A CN1087723A CN 93105857 CN93105857A CN1087723A CN 1087723 A CN1087723 A CN 1087723A CN 93105857 CN93105857 CN 93105857 CN 93105857 A CN93105857 A CN 93105857A CN 1087723 A CN1087723 A CN 1087723A
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- boiler water
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- color range
- water hardness
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Abstract
A kind of rapid assay methods of boiler water hardness and determining instrument thereof, it is a kind of assay method that utilizes the color range colorimetric to measure boiler water hardness, promptly use the metallic ion generation complex reaction in metallic ion indicator and the boiler water, by the complex compound that generates different with the indicator color and show that metallic ion in the boiler water exists how much judge the boiler water hardness, the determining instrument of the use that matches with this method is a color comparator and corresponding permanent standard color range.Superiority of the present invention is: (1) method is easy, swift to operate, but and visual rationing obtain the content of the water hardness; (2) improve mensuration sensitivity than the use of color light source and reached the ppb level; (3) standard color range constant color is will never change colour; (4) operating personnel do not need special training.
Description
The invention belongs to the assay method and the corresponding determinator thereof of boiler water hardness, particularly a kind of assay method and determining instrument thereof that utilizes standard color range colorimetric to measure boiler water hardness.
The hardness measurement of boiler water, it is one of important controlling index of its water quality, the method of current mensuration hardness has only the EDTA volumetric method, this method was used more than 30 years, though it is classical, certain weak point was arranged also, as complicated operation, must be based on precision equipment, operating personnel also must have professional training, otherwise will influence test result.Therefore study a kind of short-cut method of boiler feed water hardness measurement, will the protection work in the boiler use be had great significance.
The object of the present invention is to provide a kind of rapid assay methods and determining instrument thereof of boiler water hardness, it is a kind of assay method that utilizes the color range colorimetric to measure boiler water hardness, promptly make developer with the metallic ion indicator, with the metallic ion generation complex reaction in the boiler water, by the color that generates complex compound different with the indicator color and show that metallic ion exists in the boiler water how much judge the boiler water hardness, the determining instrument that uses of matching with this method is a color comparator and permanent standard reference color range accordingly.
Technical scheme of the present invention: a kind of rapid assay methods of boiler water hardness, it is characterized in that it is a kind of assay method that utilizes the color range colorimetric to measure boiler water hardness, it comprises uses chromogenic reagent and standard color range solution, said chromogenic reagent is made up of pH value buffering agent and metallic ion indicator, the optional sodium tetraborate of its pH value buffering agent, sodium hydrogen phosphate, sodium dihydrogen phosphate and Trls, its metallic ion indicator is optional; The blue black T of chromium, the blue K of chromium or the spirit of calcium magnesium, the proportioning of pH value buffering agent and metallic ion indicator can be 30-80% in the chromogenic reagent: 70-20%; The component of said color range solution can be the solution of cobalt salt and mantoquita, and proportion relation is that 10-90%: 90-10%(is a cobalt salt: mantoquita) be made into the Pyatyi color range and be respectively 0.00,0.01,0.02,0.03,0.04,0.05 equivalent parts per million can satisfy the scope of boiler feed water hardness measurement.
The operating process of this method is: (1) at first gives the ratio of specific heat color light source, makes it to reach normal brightness; (2) water sampling (generally can be 5ml) injects the chromogenic reagent bottle of sealing, and upset makes reaction solution even for several times; (3) above-mentioned solution being moved into cuvette is placed on the relevant position than color light source; (4) make comparisons with the standard color range that is placed on than on the color light source; (5) quantitatively determine the water hardness according to the color identical or close with color range.
Ratio color light source related in the said method is by the colorimetric illuminator, standard color range bottle and cuvette are formed, the colorimetric illuminator places on the lamp box bottom surface, the power lead of illuminator is connected to outside the case, can settle power switch on the casing, the standard color range solution bottle for preparing all inserts in the respective aperture of lamp box lid, and lamp box lid center is for placing the cup hole of cuvette, and cuvette inserts in wherein.
Principle of work of the present invention is that this method has breakthrough foundation, and the metallic ion indicator of using in this method is a kind of broad spectrum type complexing agent, except alkaline metal K
+, Na
+Outward, the common metal cation of other multivalence can both complexing.Metallic ion reaction equation in agent of metallic ion index and the water is as follows:
Wherein Hln shows the indicator look, and Mln demonstration complexing is looked for, and promptly the metallic ion indicator originally is a kind of colored compound, when it combines the formation complex compound with metallic ion after, the color of complex compound is with indicator color difference, and the change of aqueous solution color has shown the existence of metallic ion.
(1) the molecular balance equation of formula is:
(［Mln］［H
+])/([Hln] [M]) K………（2）
For simplicity, the electric charge of metallic ion is ignored, in the formula:
[M] represents concentration of metal ions free in the water;
[Mln] representation metal ion and index agent complex concentration;
[Hln] representation metal ion concentration of indicator;
[H
+] represent the pH in the water;
K represents the complex compound stability constant.
Change into following formula by (2) formula:
M = ([H
+])/(K) · ([Mln])/([Hln])
log[M]=log ([H
+])/(K) +log ([Mln])/([Hln])
Get negative logarithm-log[M]=PM
PM=PH+logK+log ([Hln])/([Mln]) then ... (3)
If the pH value in the water is constant, PM is considered as constant in reaction, and constant term merges:
PM＝logK+log ([Hln])/([Mln]) ……（4）
See from (4) formula, if the K value is very big, then PM is very big, just there is not complex reaction in the aqueous solution, free metallic ion seldom, if indicator is approaching whole complexing of metal ion, then the color of aqueous solution by the indicator look to the complex compound colour transition, the color of aqueous solution is decided by [Hln]/[Mln] ratio, and this method adds the amount of indicator fixes, along with the different intermediate color that how much forms of water sample metal ion amount, intermediate color with the standard color range relatively, can directly measure the content of metallic ion in the water sample, i.e. determining total hardness of water, this noun of intermediate color is used in the metallic ion colorimetric and the proposition of this colorimetric method just is based on this principle.
Superiority of the present invention is: (1) method is easy, swift to operate, but and visual rationing obtain the content of the water hardness, its order of accuarcy and EDTA complexometry are more in full accord; (2) improve mensuration sensitivity greatly than the use of color light source and reached the PPb level; (3) standard color range constant color is will never change colour; (4) operating personnel do not need special training.
Further specify present technique below in conjunction with drawings and Examples.
Accompanying drawing 1 is the schematic flow sheet of the rapid assay methods of the related boiler water hardness of the present invention.
Accompanying drawing 2 is employed determining instrument in the rapid assay methods of the related boiler hardness of the present invention-than the structural representation of color light source.(a is a surface structure, and b is an internal light source.）
Wherein 1 is the lamp box lid, 2 be lamp box at the bottom of, 3 is the colorimetric illuminator, 4 is the color range bottle, 5 is cuvette, 6 is the external power supply wire of illuminator, 7 is power switch.
Embodiment: a kind of rapid assay methods of boiler water hardness, it is characterized in that it is a kind of assay method that utilizes the color range colorimetric to measure boiler water hardness, it comprises uses chromogenic reagent and standard color range solution, said chromogenic reagent is made up of pH value buffering agent and the agent of metallic ion index, and the optional Trls of its PH buffering agent makes the solution pH value keep 9-11; The optional acid chrome blue K of its metallic ion indicator, with the ratio of buffering agent be 1: 1; Said standard color range solution component can be cobalt salt and mantoquita, is allocated as 0.01,0.02,0.03,0.04 in right amount by standard water sample color, 0.05 equivalent parts per million.
The operating process of this method is a (see figure 1): (1) at first gives ratio of specific heat color light source lamp 3, makes it to reach normal brightness; (2) water sampling 5ml injects the chromogenic reagent bottle of sealing, and upset makes reaction solution even for several times; (3) pour cuvette 5 into, and place it in the cuvette hole than color light source; (4) make comparisons with placing standard color range 4 than on the color light source; (5) can quantitatively determine the water hardness according to the color identical or close with color range.
Related in the said method is the lamp box that is made of the lid 1 and the end 2 than color light source (see figure 2), colorimetric illuminator 3 in the case, standard color range bottle 4 and cuvette 5 are formed, colorimetric illuminator 3 places at the bottom of the lamp box on 2 the face, the power lead 6 of illuminator is connected to outside the case, can settle power switch 7 on the casing, in the color range solution bottle 4 even color range bottle holes of inserting on the lamp box lid 1 that prepare, lamp box lid center is for placing the cup hole of cuvette 5, and cuvette inserts in wherein.
Claims (4)
1, a kind of rapid assay methods of boiler water hardness, it is characterized in that it is a kind of assay method that utilizes the color range colorimetric to measure boiler water hardness, it comprises uses chromogenic reagent and standard color range solution, said chromogenic reagent is made up of PH buffering agent and metallic ion indicator, and its proportioning is the pH value buffering agent: metallic ion indicator=30-80%: 70-20%; The component of said color range solution can be cobalt salt and mantoquita, its proportion relation is cobalt salt: mantoquita=10-90%: 90-10%, be made into the Pyatyi color range and be respectively 0.00,0.01.0.02,0.03,0.04,0.05 equivalent parts per million, the operating process of this method is at first given the ratio of specific heat color light source for (1), makes it to reach normal brightness; (2) water sampling (generally can be 5ml) injects the chromogenic reagent bottle of sealing, and the reaction solution in upset makes it for several times is even; (3) pour cuvette into, and place it on the relevant position than color light source; (4) make comparisons with placing standard color range than on the color light source; (5) quantitatively determine the water hardness according to the color identical or close with color range.
2,, it is characterized in that the pH value buffering agent in the said chromogenic reagent can be selected sodium tetraborate, sodium hydrogen phosphate, sodium dihydrogen phosphate and Trls for use by the said boiler water hardness rapid assay methods of claim 1.
3,, it is characterized in that the optional chromium of metallic ion indicator in the said chromogenic reagent is blue black, blue K of chromium or the spirit of calcium magnesium by the rapid assay methods of the said boiler water hardness of claim 1.
4, a kind of determining instrument that cooperates the rapid assay methods use of boiler water hardness, particularly a kind of color light source that compares, it is characterized in that it is made up of the lamp box that covers and the end constitutes, colorimetric illuminator, standard color range bottle and the cuvette in the case, the colorimetric illuminator places on the lamp box bottom surface, the power lead of illuminator is connected to outside the case, can settle power switch on the casing, the Pyatyi standard color range solution bottle for preparing all inserts in the respective aperture that lamp box covers, lamp box loam cake center is the cuvette hole, and cuvette inserts in wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93105857 CN1087723A (en) | 1993-05-27 | 1993-05-27 | The quick determining method for hardness of boiler water and determining instrument thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93105857 CN1087723A (en) | 1993-05-27 | 1993-05-27 | The quick determining method for hardness of boiler water and determining instrument thereof |
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| CN1087723A true CN1087723A (en) | 1994-06-08 |
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| CN 93105857 Pending CN1087723A (en) | 1993-05-27 | 1993-05-27 | The quick determining method for hardness of boiler water and determining instrument thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103608661A (en) * | 2011-05-04 | 2014-02-26 | 西门子医疗保健诊断公司 | Methods, systems, and apparatus for sample illumination |
| CN105190289A (en) * | 2013-03-14 | 2015-12-23 | 艺康美国股份有限公司 | Water hardness monitoring via fluorescence |
| 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 |
| CN113049768A (en) * | 2021-03-19 | 2021-06-29 | 北京华意龙达科技发展有限公司 | Portable equipment for detecting water hardness of heat supply boiler and using method thereof |
-
1993
- 1993-05-27 CN CN 93105857 patent/CN1087723A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103608661A (en) * | 2011-05-04 | 2014-02-26 | 西门子医疗保健诊断公司 | Methods, systems, and apparatus for sample illumination |
| CN105190289A (en) * | 2013-03-14 | 2015-12-23 | 艺康美国股份有限公司 | Water hardness monitoring via fluorescence |
| CN105190289B (en) * | 2013-03-14 | 2018-02-16 | 艺康美国股份有限公司 | Pass through the fluorescence monitoring water hardness |
| 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 |
| CN113049768A (en) * | 2021-03-19 | 2021-06-29 | 北京华意龙达科技发展有限公司 | Portable equipment for detecting water hardness of heat supply boiler and using method thereof |
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