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2011•Chinese Journal of Spectroscopy LaboratoryRequires access

Research and Application of Color Reaction of Mixed Surfactant-CAS and Copper

Cui Xin

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Abstract

Based on the color reaction of Cu2+ and CAS in the presence of Triton X100 and OP,the method for determination of trace copper by spectrophotometry was developed.Cu2+ and CAS-TritonX-100-OP formed polybasic complexes with higher sensitivity to measure the content of copper.The maximal absorption wavelength of the complex was at 618nm with apparent molar absorptivity of 6.62×105L·mol-1·cm-1.The content of Cu2+ obey Beer law in range of 0—20μg/25mL.The regression equation was A=0.039ρ+0.0078 with r=0.9993.There was less interfering ion.The method is applied to the determination of trace copper in mung with satisfactory results.

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What this paper is about

Based on the color reaction of Cu2+ and CAS in the presence of Triton X100 and OP,the method for determination of trace copper by spectrophotometry was developed.Cu2+ and CAS-TritonX-100-OP formed polybasic complexes with higher sensitivity to measure the content of copper.The maximal absorption wavelength of the complex was at 618nm with apparent molar absorptivity of 6.62×105L·mol-1·cm-1.The content of Cu2+ obey Beer law in range of 0—20μg/25mL.The regression equation was A=0.039ρ+0.0078 with r=0.9993.There was less interfering ion.The method is applied to the determination of trace copper in mung with satisfactory results.

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Available abstract

Based on the color reaction of Cu2+ and CAS in the presence of Triton X100 and OP,the method for determination of trace copper by spectrophotometry was developed.Cu2+ and CAS-TritonX-100-OP formed polybasic complexes with higher sensitivity to measure the content of copper.The maximal absorption wavelength of the complex was at 618nm with apparent molar absorptivity of 6.62×105L·mol-1·cm-1.The content of Cu2+ obey Beer law in range of 0—20μg/25mL.The regression equation was A=0.039ρ+0.0078 with r=0.9993.There was less interfering ion.The method is applied to the determination of trace copper in mung with satisfactory results.

Key concepts: Molar absorptivity, Copper, Color reaction, Spectrophotometry, Chemistry, Pulmonary surfactant, Absorption (acoustics), Wavelength

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