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Spectrophotometric Determination of Trace Cadmium in Water by Flow Injection Analysis

Li Ma, Zhang Xin-shen, Miao Pei-kai, Hua Li

Abstract

A updated method with high sensitivity system of Cd(Ⅱ)-potassium iodide-ethyl violet was established which can determine trace cadmium in seawater by flow injection analysis.And the optimum condition was got.The liner range was 0.5-12μ g/L and the relative standard deviation(n=11)for an analytical concentration of 10 μg/L Cd(Ⅱ)was 1.21%.Detection limit was 0.1 μg/L.

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Key concepts: Cadmium, Detection limit, Seawater, Relative standard deviation, Flow injection analysis, Chemistry, Trace Amounts, Iodide