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Determination of Six Metallic Elements in Ambient Air by Graphite Digestion-ICP-oaTOF-MS

Sun Chenqiu;Jiang Dongbo;Zhang Yanfei;Zhao Zhihui;Chifeng Research Academy of Environmental Sciences;Chifeng Environmental Monitoring Centre;  
Six trace elements in ambient air was determined by Intelligent Graphite Digestion and Inductively Coupled Plasma-oa time of flight Mass Spectrometry(ICP-oa TOF-MS).Factors affecting the determination were analyzed in detail.The optimum condition for the determination was obtained.The limits of determination were lower than the current national standards, recycling rates ranged from 94.5% ~101.2%.The relative standard deviation(RSD) was less than 4%.Compared with other methods, this method is a simple fast and accurate high sensitivity.For the influence factors of spectral interference were discussed, and the method of eliminating or reducing each type of spectral interference to all elements was put forward.
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