GB1419189A - Test device and method for determining water hardness - Google Patents
Test device and method for determining water hardnessInfo
- Publication number
- GB1419189A GB1419189A GB4560873A GB4560873A GB1419189A GB 1419189 A GB1419189 A GB 1419189A GB 4560873 A GB4560873 A GB 4560873A GB 4560873 A GB4560873 A GB 4560873A GB 1419189 A GB1419189 A GB 1419189A
- Authority
- GB
- United Kingdom
- Prior art keywords
- test device
- magnesium
- amount
- hardness
- water sample
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract 6
- 229910001425 magnesium ion Inorganic materials 0.000 abstract 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 2
- 239000006172 buffering agent Substances 0.000 abstract 2
- 229910001424 calcium ion Inorganic materials 0.000 abstract 2
- 239000011777 magnesium Substances 0.000 abstract 2
- 239000005725 8-Hydroxyquinoline Substances 0.000 abstract 1
- PHOQVHQSTUBQQK-SQOUGZDYSA-N D-glucono-1,5-lactone Chemical compound OC[C@H]1OC(=O)[C@H](O)[C@@H](O)[C@@H]1O PHOQVHQSTUBQQK-SQOUGZDYSA-N 0.000 abstract 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 abstract 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 abstract 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 abstract 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 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 abstract 1
- 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 abstract 1
- 239000003975 dentin desensitizing agent Substances 0.000 abstract 1
- AWNVVAMWLMUZOZ-UHFFFAOYSA-J magnesium;disodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Mg+2].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O AWNVVAMWLMUZOZ-UHFFFAOYSA-J 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229960003540 oxyquinoline Drugs 0.000 abstract 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 abstract 1
- 239000001509 sodium citrate Substances 0.000 abstract 1
- 229960001790 sodium citrate Drugs 0.000 abstract 1
- PRWXGRGLHYDWPS-UHFFFAOYSA-L sodium malonate Chemical compound [Na+].[Na+].[O-]C(=O)CC([O-])=O PRWXGRGLHYDWPS-UHFFFAOYSA-L 0.000 abstract 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 abstract 1
- 229940039790 sodium oxalate Drugs 0.000 abstract 1
- 235000002906 tartaric acid Nutrition 0.000 abstract 1
- 239000011975 tartaric acid Substances 0.000 abstract 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 abstract 1
- UJMBCXLDXJUMFB-UHFFFAOYSA-K trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4h-pyrazole-3-carboxylate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-UHFFFAOYSA-K 0.000 abstract 1
Classifications
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (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)
Abstract
1419189 Determining water hardness MILES LABORATORIES Inc 28 Sept 1973 [2 Oct 1972] 45608/73 Heading G1B A test device for colorimetrically determining the amount of hardness present in water comprises a carrier (particularly ash-free absorbent paper) incorporated with a test composition comprising an indicator undergoing a colour change in response to magnesium ions (e.g. Eriochrome Black T or Calmagite), an alkaline buffering agent and magnesium disodium ethylenediamine tetraacetic acid. The buffering agent preferably maintains a pH from 9À0 to 11À5 and may be tris (hydroxymethyl) amino methane. The device may further comprise a desensitizing agent, capable of binding magnesium and calcium ions so that they do not react with the indicator, such as tartaric acid, gluconic acid anhydride, sodium malonate, sodium oxalate, sodium citrate, 8-hydroxyquinoline or an aminopolycarboxylic acid salt not containing magnesium and calcium ions e.g. Na 4 EDTA. The device may further comprise a background dye e.g. tartrazine yellow. The amount of total hardness present in a water sample is tested for by contacting the water sample and the test device and comparing any apparent colour change developed in the test device with a colour chart standardized to indicate the amount of hardness present in a water sample.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29378372A | 1972-10-02 | 1972-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1419189A true GB1419189A (en) | 1975-12-24 |
Family
ID=23130557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4560873A Expired GB1419189A (en) | 1972-10-02 | 1973-09-28 | Test device and method for determining water hardness |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1011632A (en) |
| DE (1) | DE2349282A1 (en) |
| GB (1) | GB1419189A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2908519A1 (en) * | 2006-11-13 | 2008-05-16 | Covaltech | Water equilibrium pH measuring device for e.g. individual swimming pool, has calculator connected to sensors to automatically calculate equilibrium pH of water based on total harness, alkalinity and temperature of water, measured by sensors |
| CN103698288A (en) * | 2013-12-28 | 2014-04-02 | 中国科学院青海盐湖研究所 | Method for performing complexometric titration on magnesium ions |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345121B (en) * | 2014-09-13 | 2016-03-30 | 上海绿帝环保科技有限公司 | A kind of preparation method and using method thereof measuring the detection powder of determining total hardness of water |
-
1973
- 1973-09-18 CA CA181,396A patent/CA1011632A/en not_active Expired
- 1973-09-28 GB GB4560873A patent/GB1419189A/en not_active Expired
- 1973-10-01 DE DE19732349282 patent/DE2349282A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2908519A1 (en) * | 2006-11-13 | 2008-05-16 | Covaltech | Water equilibrium pH measuring device for e.g. individual swimming pool, has calculator connected to sensors to automatically calculate equilibrium pH of water based on total harness, alkalinity and temperature of water, measured by sensors |
| CN103698288A (en) * | 2013-12-28 | 2014-04-02 | 中国科学院青海盐湖研究所 | Method for performing complexometric titration on magnesium ions |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1011632A (en) | 1977-06-07 |
| DE2349282A1 (en) | 1974-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |