Indirect ultraviolet determination of silver with nickelocyanide ion by flow injection analysis |
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Authors: | Haj-Hussein A T |
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Institution: | Chemistry Department, Yarmouk University, Irbid, Jordan |
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Abstract: | A flow-injection method for the ultraviolet spectrophotometric determination of silver, based on its reaction with nickelocyanide ion, Ni(CN)2−4, in ammoniacal buffer medium (pH 10) and subsequent measurement of the decrease in the absorption of the Ni(CN)2−4 complex at 275 nm is described. The calibration graph is linear in the range 10–400 μm silver. At a sampling rate of about 60 samples h−1 with 35 μl sample injections, precision was about 1% relative standard deviation. The proposed method was successfully applied to the determination of silver in some common silver minerals. |
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Keywords: | Silver Nickelocyanide ion Flow injection analysis |
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