Determination of copper by flame atomic absorption spectrometry using flow injection on-line preconcentration with double micro-columns

Abstract

A flow injection spectrophotometric method is proposed for on-line preconcentration and determination of trace amounts of copper in water samples. The results show that copper can be determined using the sample pH in 6.98, sample flow rate of 2.5 ml min-1, and the elution step using 0.1 mol/-1 hydrochloric acid solution at flow rate of 2 ml min -1. Under optimized conditions, the relative standard deviation of this method was 6.5% at 3 μg·1-1 (n=5), and the detection limit was 0.585 μ·1-1. The analytical recovery was up to 93∼109% and 94∼106% respectively in detecting environment water and drinking water.