【摘要】 目的建立PM_2.5中12种金属元素含量的测定方法,并将其应用于实际监测。方法优化超声浸提PM_2.5中金属元素条件,采用电感耦合等离子体质谱法（ICP-MS）测定PM_2.5中镍（Ni）、镉（Cd）、铊（Tl）、铅（Pb）、铝（Al）、砷（As）、铍（Be）、铬（Cr）、锰（Mn）、锑（Sb）、硒（Se）、汞（Hg）含量。结果各金属元素回程方程线性关系良好,r=0.999 7⁰.999 9;检出限范围为0.001 5⁰.42ng/m³,定量下限为0.005¹.4ng/m³;相对标准偏差（RSD）为0.58%⁶.53%;加标回收率为87.9%¹01.4%。结论建立的方法可实现PM_2.5中多种金属元素同时检测,灵敏度高、准确性好、动态线性范围较宽。更多还原

【Abstract】 Objective To establish and apply an assay for multiple metallic elements in PM_2.5 by ultrasonic extraction and ICP-MS.Methods The ultrasonic extraction conditions of metal elements were optimized.Metal elements concentrations including nickel（Ni）,cadmium（Cd）,thallium（Tl）,lead（Pd）,aluminum（Al）,arsenic（As）,beryllium（Be）,chromium（Cr）,manganese（Mn）,antimony（Sb）,selenium（Se）and mercury（Hg）in PM_2.5 were determined by inductively coupled plasma mass spectrometry（ICP-MS）.Results The linear regression equation of each element is good（r=0.999 7-0.999 9）;Detection limit of each element was from 0.001 5ng/m³ to 0.42ng/m³,with quantitative limit of 0.005ng/m³ to 1.4ng/m³ and relative standard deviation（RSD）from 0.58%to 6.53%.Standard addition recovery was from 87.9%to 101.4%.Conclusion The established assay can achieve multiple metallic element determination simutaneously with high sensitivity,good accuracy and dynamic wide linear range.更多还原