发明名称 |
METHOD FOR DETERMINING DISSOLVED OXYGEN IN WATER |
摘要 |
The invention relates to a method for determining the concentration of dissolved oxygen in a liquid water sample comprising the steps: (a) providing a liquid water sample of predetermined volume, the oxygen content of which is to be determined; (b) mixing additives with the liquid water sample to form a mixture, the additives comprising an oxidizable metal salt comprising a metal cation and an anion selected from an inorganic anion or an organic anion which, with the cation, results in a water soluble oxidizable metal salt, at least one water soluble alkali metal compound selected from an alkali metal oxide, or an alkali metal hydroxide or a salt of an alkali metal and a weak acid; and at least one oxidation-reduction indicator capable of a color change upon oxidation of the oxidizable metal salt during contact with dissolved oxygen in the liquid sample to a color indicative of the concentration of dissolved oxygen in the liquid sample; (c) preventing any substantial contact of the mixture with atmospheric oxygen; and (d) determining the concentration of dissolved oxygen in the liquid sample by comparing the color of the mixture to a predetermined color indicative of the concentration of dissolved oxygen in the water sample. |
申请公布号 |
CA2221419(A1) |
申请公布日期 |
1996.11.21 |
申请号 |
CA19952221419 |
申请日期 |
1995.05.15 |
申请人 |
AQUARIUM PHARMACEUTICALS, INC. |
发明人 |
YOSHPA, MICHAEL;ELSON, JESSE |
分类号 |
G01N21/78;G01N31/22;G01N33/18 |
主分类号 |
G01N21/78 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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