Spectrophotometric determination of lead with Pyrocatechol Violet and cationic surfactants |
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Authors: | Maciej Jarosz Aleksander
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Institution: | Maciej Jarosz,Aleksander
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Abstract: | The optimum conditions for the formation of ternary lead complexes with Pyrocatechol Violet and cationic surfactants have been evaluated. The examined ternary systems form a basis for simple and sensitive spectrophotometric methods for lead (ε = 4.20−5.06 × 104 liters · mol−1 · cm−1). Using the most sensitive method, lead content in zinc powder has been determined. Lead does not form ternary complexes with the other triphenylmethane reagents, Chrome Azurol S and Eriochrome Cyanine R, in the presence of cationic surfactants because of its too “soft” properties. |
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