Determination of Total Lead Content in Automotive Coatings by Microwave and Electrothermal Plate Digestion-ICP-OES
The lead in automotive coatings was completely digested using microwave high-pressure sealed digestion method and electrothermal plate digestion method,respectively,and then prepared into a sample solution.The total lead content in the sample solution was determined using inductively coupled plasma optical emission spectroscopy(ICP-OES).Comparing the sample determination results of two digestion methods,the spiked recovery rate of total lead content by microwave digestion method is 95.6%～98.1%,and the spiked recovery rate of total lead content by electrothermal plate digestion method is 97.4%～101.2%.After verification,microwave digestion method has the advantages of shorter time consumption,less reagent dosage,and higher safety,accuracy and precision.
microwave digestionelectrothermal plate digestionautomotive coatingstotal lead content
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