FIELD: analytical methods.
SUBSTANCE: indicator composition, which is used two-step analytical procedure, contains 0.6% anionite AN-31 in sulfate form (as sorbent), 0.05% 4-(2-pyridylazo)resorcinol (reagent), 0.098-0.1% sulfuric acid as pH-creating reagent in the first step, which is neutralized in the second step with excess (0.0035-0.004%) aqueous ammonia to pH 9. Method can be, in particular, used for assaying waste waters and industrial solutions.
EFFECT: enabled joint determination of the two ions, improved selectivity of analysis, and accelerated analytical procedure.
3 tbl
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| INDICATOR COMPOSITION FOR DETERMINING MANGANESE(II) IN AQUEOUS SOLUTIONS | 2004 |
|
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| INDICATOR COMPOSITION FOR DETERMINING COPPER(II) IN AQUEOUS SOLUTIONS | 2002 |
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|
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| INDICATOR COMPOSITION FOR DETERMINING GOLD(III) IN AQUEOUS SOLUTIONS | 2006 |
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| INDICATING COMPOSITION FOR GOLD (III) ASSAY IN AQUEOUS SOLUTIONS | 2004 |
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| INDICATING COMPOSITION FOR MOLYBDENUM ( VI ) DETECTION IN AQUEOUS SOLUTIONS | 2004 |
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RU2252415C1 |
| INDICATOR COMPOSITION FOR DETERMINING GOLD(III) IN AQUEOUS SOLUTIONS | 2005 |
|
RU2291423C1 |
| METHOD OF SEPARATING PLATINUM (II, IV) AND PALLADIUM (II) FROM SILVER (I), IRON (III) AND COPPER (II) IN HYDROCHLORIC ACID SOLUTIONS | 2019 |
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| INDICATOR COMPOSITION FOR DETERMINING SILVER(I) IN AQUEOUS SOLUTIONS | 2005 |
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RU2291421C1 |
| METHOD FOR SEPARATING PLATINUM (II, IV), COPPER (II), AND ZINC (II) IN HYDROCHLORIC ACID SOLUTIONS | 2016 |
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RU2637547C1 |
