WO2002075300A1 - Verfahren und messanordnung zur untersuchung des kohlendioxidgehalts in wasser - Google Patents
Verfahren und messanordnung zur untersuchung des kohlendioxidgehalts in wasser Download PDFInfo
- Publication number
- WO2002075300A1 WO2002075300A1 PCT/DE2002/000335 DE0200335W WO02075300A1 WO 2002075300 A1 WO2002075300 A1 WO 2002075300A1 DE 0200335 W DE0200335 W DE 0200335W WO 02075300 A1 WO02075300 A1 WO 02075300A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carbon dioxide
- water
- measuring
- test tube
- air
- Prior art date
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 39
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 16
- 238000009434 installation Methods 0.000 claims abstract description 9
- 230000007797 corrosion Effects 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract 4
- 238000004040 coloring Methods 0.000 claims abstract 2
- 238000005259 measurement Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims 2
- 239000011230 binding agent Substances 0.000 claims 1
- 239000013013 elastic material Substances 0.000 claims 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine hydrate Chemical compound O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 7
- 150000002500 ions Chemical class 0.000 abstract description 4
- 238000002845 discoloration Methods 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/004—CO or CO2
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
- G01N31/221—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating pH value
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
- G01N31/223—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- the invention relates to a method for examining the carbon dioxide content in water, in particular tap water conducted in copper pipelines, and a measuring arrangement for carrying out the method to ensure that water supply systems are not affected by corrosion.
- the invention is therefore based on the object of specifying a method for determining the carbon dioxide content, specifically before the reinstallation of water supply systems, which can be carried out by untrained personnel directly at the installation location and which provides reliable measurement results with little expenditure of time and equipment, and provides a measurement arrangement to specify to carry out the procedure.
- the object is achieved with a method according to the features of claim 1 and with a measuring arrangement designed according to the features of claim 4.
- the essence of the invention is that the carbon dioxide expelled from a fresh water sample with finely divided air is passed directly over a chemical initially formed as a short strand section (buffer area) and then as an elongated strand section (measuring area) with a reduced diameter, directly at the installation site, which forms an acid with the supplied carbon dioxide and also has a pH color indicator.
- the elongated strand section (measuring range) is calibrated so that a certain length of discoloration of this strand section corresponds to a certain value of the carbon dioxide content.
- the measuring arrangement according to the invention for carrying out the method essentially comprises a gas wash bottle which receives the fresh water sample and has means for the finely divided supply of air in order to drive off the carbon dioxide from the water sample, as well as a C0 test tube which can be connected to the gas space above the liquid level and in which Direction of flow first the short chemical strand for buffering moisture and C0 2 from the air and then the elongated chemical strand with a smaller diameter is located.
- the elongated measuring strand is designed so that a certain length of its reaction area with carbon dioxide and the corresponding discoloration, due to the changed pH value, corresponds to a certain carbon dioxide content in the water sample.
- the reaction length of the measuring line at which a limit value for the carbon dioxide content is reached is identified by a marking on the C0 2 test tube.
- a method and a measuring arrangement are available that allow the installer of water supply systems to determine whether the maximum permissible value of the carbon dioxide content, which is 44 mg / 1, has been determined and to draw the necessary conclusions for the installation.
- the measuring process can be carried out easily and very quickly, that is, within a few minutes by untrained personnel.
- the cost and the equipment required to carry out the measurement are also low compared to the other known methods.
- the components required for the measuring arrangement are simple and safe to use. With the method and the associated measuring arrangement, the carbon dioxide content is direct measured, and that without cross-sensitivity to other ions and without errors due to pH errors.
- a gas washing bottle with a frit attachment which has a frit tube with an air intake socket and a frit attached to the other tube end for air distribution in the water sample.
- the frit attachment also has an intake port, via which the gas space above the water sample is first connected to the C0 2 test tube and then to a suction pump. A defined amount of air is sucked in at the air intake port via the suction pump and pressed through the frit in order to rise in the form of fine bubbles in the water sample and to expel the carbon dioxide from the water.
- Fig.l is a schematic representation of a measuring arrangement for checking whether a predetermined limit value of the carbon dioxide content in water.
- Fig. 2 is a C0 2 test tube used in the arrangement of FIG. 1 in an enlarged view 1, the arrangement for examining water for a portion of carbon dioxide (C0 2 ) which acts aggressively on a copper line system consists essentially of a commercially available gas wash bottle 1 (gas wash bottle according to Drechsel) for receiving a water sample 15 and one to it C0 2 test tube 2 connected ball pump 3.
- the C0 2 test tube 2 for determining the limit value of carbon dioxide in water, ie to determine whether the C0 2 content in water exceeds a certain limit value of 44 mg / 1, is in a short pipe section ( Line section 4 - buffer area) and divided into a long pipe section (line section 5 - measuring area).
- both tube sections there is a short strand section 4 (buffer area) and an elongated strand section 5 (measuring area) with a reduced diameter made of a chemical consisting of silica gel impregnated with hydrazine solution and crystal violet as a color indicator.
- the strand section 4 located in the short pipe section acts as a buffer area for the CO and moisture content of the air introduced into the water sample to expel the carbon dioxide. This means that a lot of water including CO 2 is bound in the strand section 4, so that the influence of moisture is minimized and the measurement result is not falsified.
- the dried C0 2 is measured in the elongated strand section 5 with the lower proportion of chemicals over the strand cross section. This area is very sensitive.
- the C0 2 test tube 2 has a marking 6 in the area of the strand section 5 (measuring range), which marks the limit value of the permissible carbon dioxide content in the tap water to be examined, ie 44 mg / 1. Before use, the C0 2 test tube 2 is airtight at both ends. On the C0 2 test tube 2 there is also an arrow 7, the correct integration of which
- the acid formed in conjunction with the crystal violet causes discoloration, a measure of the carbon dioxide content in the water to be examined.
- discoloration beyond the mark 6 is the limiting value of 44 mg C0 2/1 / occurs in the corrosion of the copper pipes usually used, exceeded. In this case, suitable measures must be taken to prevent corrosion damage in the pipes.
- the permissible C0 2 content the number of strokes indicated above, ie the gas volume sucked through, can be increased in order to improve the sensitivity of the test tube.
- a temperature measuring strip 19 for measuring the water temperature is attached to the gas washing bottle 1 in order to be able to take into account the temperature dependence of the CO 2 desorption rate.
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10114135.1 | 2001-03-16 | ||
DE10114135A DE10114135C2 (de) | 2001-03-16 | 2001-03-16 | Verfahren und Messanordnung zur Untersuchung des Kohlendioxidgehalts in Wasser |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002075300A1 true WO2002075300A1 (de) | 2002-09-26 |
Family
ID=7678628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/000335 WO2002075300A1 (de) | 2001-03-16 | 2002-01-25 | Verfahren und messanordnung zur untersuchung des kohlendioxidgehalts in wasser |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10114135C2 (de) |
WO (1) | WO2002075300A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013006548B4 (de) * | 2013-04-16 | 2022-02-03 | Dräger Safety AG & Co. KGaA | Messvorrichtung, Reaktionsträger und Messverfahren |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3773469A (en) * | 1971-06-28 | 1973-11-20 | Sw Research Inst | Method and apparatus for determining the amount of certain components in a substance, such as inorganic carbon and the like |
US4063891A (en) * | 1975-07-31 | 1977-12-20 | Bayer Aktiengesellschaft | Method for determining the inorganic carbon content of aqueous liquids |
JPS61218941A (ja) * | 1985-03-26 | 1986-09-29 | Kao Corp | 水中二酸化炭素濃度測定法及びこれに用いる測定用容器 |
JPH04357456A (ja) * | 1991-04-11 | 1992-12-10 | Matsushita Electric Works Ltd | 炭酸ガス濃度計測システム |
JPH08129011A (ja) * | 1994-10-28 | 1996-05-21 | Shimadzu Corp | 無機炭素測定装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3909240A1 (de) * | 1989-03-21 | 1990-09-27 | Huels Chemische Werke Ag | Verfahren zum bestimmen von zersetzungsfaehigen kohlenstoffverbindungen in wasser |
DE4307814A1 (de) * | 1993-03-12 | 1994-09-15 | Groeger & Obst Mes Und Regelte | Verfahren zur Abscheidung von in Wasser, insbesondere Abwasser, anorganisch gebundenem Kohlenstoff (TIC) und Ausgasungselement hierfür |
-
2001
- 2001-03-16 DE DE10114135A patent/DE10114135C2/de not_active Expired - Fee Related
-
2002
- 2002-01-25 WO PCT/DE2002/000335 patent/WO2002075300A1/de not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3773469A (en) * | 1971-06-28 | 1973-11-20 | Sw Research Inst | Method and apparatus for determining the amount of certain components in a substance, such as inorganic carbon and the like |
US4063891A (en) * | 1975-07-31 | 1977-12-20 | Bayer Aktiengesellschaft | Method for determining the inorganic carbon content of aqueous liquids |
JPS61218941A (ja) * | 1985-03-26 | 1986-09-29 | Kao Corp | 水中二酸化炭素濃度測定法及びこれに用いる測定用容器 |
JPH04357456A (ja) * | 1991-04-11 | 1992-12-10 | Matsushita Electric Works Ltd | 炭酸ガス濃度計測システム |
JPH08129011A (ja) * | 1994-10-28 | 1996-05-21 | Shimadzu Corp | 無機炭素測定装置 |
Non-Patent Citations (3)
Title |
---|
DATABASE WPI Section Ch Week 198645, Derwent World Patents Index; Class A89, AN 1986-295842, XP002201624 * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 228 (P - 1531) 11 May 1993 (1993-05-11) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30) * |
Also Published As
Publication number | Publication date |
---|---|
DE10114135C2 (de) | 2003-02-06 |
DE10114135A1 (de) | 2002-10-02 |
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