AU2001287704A1 - Method and agent for determining total water hardness - Google Patents
Method and agent for determining total water hardnessInfo
- Publication number
- AU2001287704A1 AU2001287704A1 AU2001287704A AU8770401A AU2001287704A1 AU 2001287704 A1 AU2001287704 A1 AU 2001287704A1 AU 2001287704 A AU2001287704 A AU 2001287704A AU 8770401 A AU8770401 A AU 8770401A AU 2001287704 A1 AU2001287704 A1 AU 2001287704A1
- Authority
- AU
- Australia
- Prior art keywords
- total water
- water hardness
- agent
- determining total
- cpc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract 2
- 239000003795 chemical substances by application Substances 0.000 title 1
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 abstract 3
- 229910052791 calcium Inorganic materials 0.000 abstract 2
- 239000011575 calcium Substances 0.000 abstract 2
- 229910052749 magnesium Inorganic materials 0.000 abstract 2
- 239000011777 magnesium Substances 0.000 abstract 2
- CPBJMKMKNCRKQB-UHFFFAOYSA-N 3,3-bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1-one Chemical compound C1=C(O)C(C)=CC(C2(C3=CC=CC=C3C(=O)O2)C=2C=C(C)C(O)=CC=2)=C1 CPBJMKMKNCRKQB-UHFFFAOYSA-N 0.000 abstract 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- 239000000872 buffer Substances 0.000 abstract 1
- 239000007853 buffer solution Substances 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 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
- G01N33/18—Water
- G01N33/1853—Hardness of water
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention relates to a dry chemical method and a test strip for determining calcium and magnesium in aqueous samples. Said test strip contains o-cresolphthalein complex (o-CPC; CAS Registry No. 2411-89-4) as a colour-causing reagent in a buffer system with a pH value of below 8.5. By using in particular an aqueous ethanolic imidazole buffer with a pH value of 6.75, conditions can be set up in such a way that the o-CPC has an identical molar sensitivity with respect to Ca and Mg. The total water hardness of aqueous samples can thus be easily determined.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10061140 | 2000-12-08 | ||
| DE10061140A DE10061140A1 (en) | 2000-12-08 | 2000-12-08 | Methods and means for determining total hardness |
| PCT/EP2001/009967 WO2002046742A1 (en) | 2000-12-08 | 2001-08-30 | Method and agent for determining total water hardness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2001287704A1 true AU2001287704A1 (en) | 2002-06-18 |
Family
ID=7666329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2001287704A Abandoned AU2001287704A1 (en) | 2000-12-08 | 2001-08-30 | Method and agent for determining total water hardness |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6994973B2 (en) |
| EP (1) | EP1340072B1 (en) |
| JP (1) | JP2004518113A (en) |
| AT (1) | ATE470147T1 (en) |
| AU (1) | AU2001287704A1 (en) |
| DE (2) | DE10061140A1 (en) |
| WO (1) | WO2002046742A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10239204B3 (en) * | 2002-08-21 | 2004-06-09 | Frank Dipl.-Ing. Zahn | Ionic strength sensor |
| DE102004015387B4 (en) * | 2004-03-26 | 2015-02-05 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Process for the photometric determination of the total hardness of aqueous solutions |
| US7964409B1 (en) * | 2007-02-07 | 2011-06-21 | Louisiana Tech Research Foundation; A Division Of Louisiana Tech University Foundation, Inc. | Detecting hypocalcemia using bovine nose sweat |
| US8158405B2 (en) * | 2008-06-30 | 2012-04-17 | General Electric Company | Process for concentrating and processing fluid samples |
| US20100015657A1 (en) * | 2008-07-21 | 2010-01-21 | Quest Diagnostics Investments Incorporated | Methods and devices for assessing biological fluids |
| CN103472060B (en) * | 2013-10-10 | 2016-01-20 | 中国科学院苏州生物医学工程技术研究所 | A kind of urine calcium ion Test paper and preparation method thereof |
| US20150198540A1 (en) * | 2014-01-10 | 2015-07-16 | Ecolab Usa Inc. | Dry reagent based water analyzer |
| WO2016073670A1 (en) * | 2014-11-07 | 2016-05-12 | Water Lens, LLC | Compositions, apparatus and methods for determining alkalinity of an analyte solution |
| WO2016196207A1 (en) | 2015-05-29 | 2016-12-08 | Water Lens, Llc. | Compositions, apparatus, and methods for determining hardness of water and magnesium ion in an analyte composition |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3822116A (en) * | 1972-08-30 | 1974-07-02 | Medico Electronic Inc | Reagent and method for calcium determination |
| US3938954A (en) * | 1973-04-11 | 1976-02-17 | The Dow Chemical Company | Determination of calcium |
| JPS55426A (en) * | 1978-06-19 | 1980-01-05 | Toyo Roshi Kk | Blood calcium detecting composite and testing member |
| DE3514695C2 (en) * | 1985-04-24 | 1994-05-11 | Merck Patent Gmbh | Composition and method for the determination of calcium |
| JPH0664038B2 (en) * | 1985-05-31 | 1994-08-22 | 株式会社島津製作所 | Analytical method for tetracyclines |
| JPS6264951A (en) * | 1985-09-18 | 1987-03-24 | Kao Corp | Method for determining total hardness of water and determining reagent used therein |
| DE3773073D1 (en) * | 1986-07-15 | 1991-10-24 | Fuji Photo Film Co Ltd | METHOD FOR THE PRODUCTION OF AN ANALYZING UNIT CONSISTING OF SEVERAL LAYERS. |
| JPS6425061A (en) * | 1987-07-20 | 1989-01-27 | Fuji Photo Film Co Ltd | Unitary type multilayered analysis element for analyzing calcium |
| US4904605A (en) * | 1988-06-20 | 1990-02-27 | Cuno, Inc. | Method and apparatus for residential water test kit |
| DE4015590A1 (en) * | 1990-05-15 | 1991-11-21 | Boehringer Mannheim Gmbh | TEST CARRIER FOR THE DETERMINATION OF IONS |
| DE19623747A1 (en) * | 1994-12-14 | 1997-12-18 | Juergen Lehmann | Diagnostic test strips for detecting analytes in urine |
| DE69703906T2 (en) * | 1996-03-29 | 2001-06-13 | Kyoto Daiichi Kagaku Kk | Device for measuring magnesium in biological liquids |
-
2000
- 2000-12-08 DE DE10061140A patent/DE10061140A1/en not_active Withdrawn
-
2001
- 2001-08-30 EP EP01967301A patent/EP1340072B1/en not_active Expired - Lifetime
- 2001-08-30 AU AU2001287704A patent/AU2001287704A1/en not_active Abandoned
- 2001-08-30 US US10/433,839 patent/US6994973B2/en not_active Expired - Lifetime
- 2001-08-30 JP JP2002548430A patent/JP2004518113A/en active Pending
- 2001-08-30 WO PCT/EP2001/009967 patent/WO2002046742A1/en active Application Filing
- 2001-08-30 AT AT01967301T patent/ATE470147T1/en not_active IP Right Cessation
- 2001-08-30 DE DE50115503T patent/DE50115503D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE50115503D1 (en) | 2010-07-15 |
| EP1340072A1 (en) | 2003-09-03 |
| EP1340072B1 (en) | 2010-06-02 |
| US6994973B2 (en) | 2006-02-07 |
| WO2002046742A1 (en) | 2002-06-13 |
| DE10061140A1 (en) | 2002-06-13 |
| US20040033484A1 (en) | 2004-02-19 |
| JP2004518113A (en) | 2004-06-17 |
| ATE470147T1 (en) | 2010-06-15 |
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