Study on the Method of Simultaneous Determination of Six Metals in Welding Fume by Micro wave Digestion Combined With ICP-OES
Objective:A new method for the simultaneous determination of six metals and their compounds in welding fume by microwave digestion combined with ICP-OES was established.Methods:Samples were collected using microporous fil-ter membranes,digested with a microwave digestion instrument,and the content of six metals was determined simultaneous-ly by ICP.The experimental conditions were optimized,and the linear parameters,precision,accuracy and other indicators of the method were examined.Results:The six metals showed a linear relationship within the measurement range,with cor-relation coefficients reaching 0.999 9.The determination limits of the method were in the range of 0.04-0.64 μg/m3.The av-erage recovery rate was 95.2％-107.2％,and the relative standard deviation was less than 5％.Conclusion:The method is simple,efficient and accurate,and can be used for the determination of manganese,nickel,chromium,copper,molybde-num,vanadium and their compounds in welding dust.
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维普
