Abstract
[Objective] To establish a method for determining 22 elements in atmospheric PM2.5 simultaneously by inductively coupled plasma mass spectrometry (ICP-MS).[Methods] Particulate matters in air were sampled with TH-150 air sampler in Nanming District and Huaxi District of Guiyang.Samples were extracted using ultrasound from divided sample filters and measured by ICP-MS.[Results] The correlation coefficients for the 22 elements measured with varied concentration ranges were all ＞ 0.998.Within a total sampling volume of 144 m3,the detection concentrations of elements including lithium,stibium,arsenic,beryllium,cadmium,chromium,nickel,selenium,thallium,vanadium,cobalt,strontium,molybdenum,silver,tin,barium,uranium,aluminum,iron,lead,manganese,and mercury were 0.03,0.09,0.38,0.03,0.03,0.63,1.05,0.39,0.04,0.05,0.03,0.03,0.05,0.06,0.09,1.16,0.05,2.36,1.94,0.85,0.72,and 0.04ng/m3,respectively.After the blank membranes were spiked with mixed standards of aluminum,iron,and barium at 25.0,50.0,and 75.0 μg/L,mercury at 0.5,2.0,and 8.0 μg/L,and the other elements at 5.0,20.0,and 40.0 μg/L,the recoveries were between 74.3％-98.5％.The determination results for the two groups of quality control membranes met the requirements on uncertainty.Moreover,the relative standard deviations ranged from 2.3％ to 9.9％.[Conclusion] The method is highly sensitive,precise,and accurate for determining the 22 elements in atmospheric PM2.5.关键词
电感耦合等离子体质谱/元素测定/PM2.5/大气环境Key words
inductively coupled plasma mass spectrometry/element determination/PM2.5/atmospheric environment分类
医药卫生
