Synthesis and Application of p-Carboxyarsenazo for Spectrophotometric Determination of Cu(II) in Environment Water

Abstract:

p-Carboxyarsenazo (CASA) color reagent was synthesized by simple diazotization reaction, and the chromomeric reaction between CASA with Cu(Ⅱ) has been studied by spectrophotometry. In pH=4.6 NaAc-HAc buffer solution, Cu(Ⅱ) reacted with CASA to form a red complex and exhibits an absorption maximum at 614 nm, Beer’s law is obeyed for 0-160 μg/L of copper in solution, the apparent molar absorptivity obtained is 1.57×104 L/(mol.cm), and the relative standard deviation (R.S.D.) is 1.6%. The proposed method exhibited high sensitivity and selectivity for Cu(Ⅱ). The results obtained by this method in the determination of environment water samples were accurate, sensitive and repeatable

• Periodical: Advanced Materials Research (Volume 830)
• Pages: 298-301
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.830.298
• Online since: October 2013
• Authors: Lin Gao*, Yan Hua Li, Sheng Jie Chen, Fang Chen, Yuan Fang Zhang, Jun Long Yao
• Keywords: Copper, p-Carboxyarsenazo, Spectrophotometry, Synthesis

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