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Spectrophotometric Determination of Cd(II) with 4-sulfo-benzenediazoaminoazobenzene

Jia Qing-ling

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Abstract

In the presence of surfactant OP and in the medium of pH=11.0 NH4Cl-NH3·H2O,4-sulfo-benzenediazoaminoazobenzene forms a red complex with cadmium(Ⅱ).The complex has a maximum absorption at 522 nm.The molar ratio of the reagent to Cd(Ⅱ) is 2 : 1.Beer's law is well obeyed in the range of(0～15) μg/25mL for cadmium,the correlation coefficient is 0.998,and the molar absorptivity e =1.88×105 L · mol-1 · cm-1.This method has been applied to the direct determination of cadmium in waste water with satisfactory results.

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What this paper is about

In the presence of surfactant OP and in the medium of pH=11.0 NH4Cl-NH3·H2O,4-sulfo-benzenediazoaminoazobenzene forms a red complex with cadmium(Ⅱ).The complex has a maximum absorption at 522 nm.The molar ratio of the reagent to Cd(Ⅱ) is 2 : 1.Beer's law is well obeyed in the range of(0～15) μg/25mL for cadmium,the correlation coefficient is 0.998,and the molar absorptivity e =1.88×105 L · mol-1 · cm-1.This method has been applied to the direct determination of cadmium in waste water with satisfactory results.

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Available abstract

In the presence of surfactant OP and in the medium of pH=11.0 NH4Cl-NH3·H2O,4-sulfo-benzenediazoaminoazobenzene forms a red complex with cadmium(Ⅱ).The complex has a maximum absorption at 522 nm.The molar ratio of the reagent to Cd(Ⅱ) is 2 : 1.Beer's law is well obeyed in the range of(0～15) μg/25mL for cadmium,the correlation coefficient is 0.998,and the molar absorptivity e =1.88×105 L · mol-1 · cm-1.This method has been applied to the direct determination of cadmium in waste water with satisfactory results.

Key concepts: Molar absorptivity, Reagent, Cadmium, Chemistry, Pulmonary surfactant, Absorption (acoustics), Molar ratio, Spectrophotometry

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Spectrophotometric Determination of Cd(II) with 4-sulfo-benzenediazoaminoazobenzene — Research Paper | ScholarLens