FIELD: chemistry.
SUBSTANCE: invention relates to qualitative and semiquantitative detection of cadmium (II) ions in aqueous solutions and can be used for rapid analysis of working solutions away from laboratory facilities. The indicator contains a modified matrix based on silica gel and an organic reagent. The modified matrix used is silica gel in OH- state, modified by trimethylammonium groups, and the organic reagent is 1-(2-hydroxy-5-sulphophenyl)-3-methyl-5-(benzothaizol-2-lyl) formazan and, additionally, aqueous ethanol solution with the following ratio of components, wt %: said silica gel 96.0-98.0, said organic reagent 0.001-0.030, aqueous ethanol solution - the rest.
EFFECT: easier and faster analysis, as well as accurate detection of cadmium (II) ions beyond maximum permissible concentration levels.
2 ex, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
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|
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