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Influence Factors in Determination of Silver by MWP AAS

Du Xiaoguang (School of Sciences,Northeastern University, Shenyang 110006,China)  
A low power argon microwave plasma obtained with surfatron was used as an atomizer for atomic absorption spectrometry. An electrothermal vaporization system was designed for sample introduction. A concentrated H 2SO 4 desiccater was used for desolvation. Influence factors for determining trace Ag were investigated such as acidity of the solution,voltage of desoluation,time of desiccation,voltage of vaporization,microwave forward power,carrier gas flow rate and coexisting chemical species. This method has been successfully applied to the analysis of aqueous samples. A comparison of MWP AAS with ICP approaches suggests several advantages of the MWP source as an atomizer for AAS over the ICP one.
【CateGory Index】: O657.31
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