Inductively Coupled Plasma Mass Spectrometry for the Determination of Phosphoric Acid and Other 14 Elements in Workplace Air
Objective:To improve the efficiency of analysis and detection of phosphorus acid,metals and their compounds in workplace air,this experiment established a method for the determination of phosphorus acid and other 14 elements and their compounds in workplace air by inductively coupled plasma mass spectrometry(ICP-MS).Methods:Microporous filters and impregnated microporous filters were used to collect phosphorus acid,metals and their compounds in workplace air.After wet digestion with nitric acid or elution with 3%nitric acid solution,ICP-MS was used for analysis.Results:The elements to be determined showed good linear relationships within the selected range of the experiment,with correlation coefficients more than 0.999.The detection limits ranged from 0.009 μg/L to 1.99 μg/L,and the lowest detectable concentrations were 3.06×10-6 mg/m3 to 6.63×10-6 mg/m3.The average recovery rates of the elements ranged from 93.2%to 103.6%,the relative standard deviation(RSD)were from 1.11%to 3.82%.The average digestion efficiency was 99.3%,and the average elution efficiency was 98.5%.The samples could be stored for at least 14 days at room temperature,which met the requirements specified in GBZ/T 210.4-2008.The analytical results of the national standard reference materials were within the standard value range.Conclusion:This method is simple,rapid,accurate,and sensitive,and can be used for the detection of 15 elements and their compounds in workplace air.
ICP-MSphosphorus acidmetals and their compoundsworkplace air
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