Direct Inhalation Atomic Absorption Spectrophotometry for the Determination of Copper,Lead,and Cadmium in Clean Surface Water
In this paper,a method for determining copper,lead,and cadmium in clean surface water by direct inhalation atomic absorption spectrophotometry was optimized by selecting appropriate working standard solutions to construct a calibration curve.The detection limits for copper,lead,and cadmium were 0.002 5,0.013 1,and 0.001 2 mg/L,respectively,with relative standard deviations(RSD)all less than 5％.For testing low-concentration solutions,the relative deviations(RD)were all less than 20％.This method is simple,fast,and has high precision and accuracy,meeting the quantitative determination requirements for copper(Class Ⅰ),lead(Class Ⅲ),and cadmium(Class Ⅱ)standard limits and below in surface water.
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