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Determination of chromium at the «Ultra Trace» graphite electrode by cathodic stripping voltammetry
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AB-243 Determination of chromium at the «Ultra Trace» graphite electrode by cathodic stripping voltammetry
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The method described allows traces of chromium in the range 1...250 µg/L (ppb) to be determined. It is based on the adsorption of a Cr(III)-diphenylcarbazonate complex at the Ultra Trace graphite electrode. Other organic constituents in the sample (such as could occur in natural waters) interfere considerably with the determination. For this reason they must first be eliminated, e.g. by UV digestion. The determination is carried out by adsorptive stripping voltammetry according to the DC method. It is not necessary to degas the sample solution. The determination also works for samples with a high concentration of inorganic salts.
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AB-243 Determination of chromium at the «Ultra Trace» graphite electrode by cathodic stripping voltammetry
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AB-243 Determination of chromium at the «Ultra Trace» graphite electrode by cathodic stripping voltammetry
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AB-243 Determination of chromium at the «Ultra Trace» graphite electrode by cathodic stripping voltammetry
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AB-243 Determination of chromium at the «Ultra Trace» graphite electrode by cathodic stripping voltammetry
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AB-243 Determination of chromium at the «Ultra Trace» graphite electrode by cathodic stripping voltammetry
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