ICP-OES法测定大气和废气颗粒物中的金属元素

将微波消解法与电感耦合等离子体发射光谱法(ICP-OES)相结合,对大气和废气颗粒物中金属元素的微波消解条件及ICP-OES测定条件进行了优化研究,建立了大气和废气颗粒物中铝(Al)、钡(Ba)、镉(Cd)、铬(Cr)、铜(Cu)、锰(Mn)、钼(Mo)、镍(Ni)、铅(Pb)、锡(Sn)、锶(Sr)及锌(Zn)等金属元素的测定方法。对方法的检出限进行了测定,各元素的检出限均低于0.04 mg/L;对方法的精密度进行了测定,各元素的相对标准偏差在2.59%～7.14%之间;对方法的准确度进行了测定,质控滤膜中各元素的回收率在89.6%~119%之间,颗粒物参考物质中各元素的回收率在85.1%～107%之间,并将该方法成功应用到 TSP、污染源废气实际样品中金属元素的测定。

Determination of Metals in Atmosphere and Waste Gas Particulate Matter with ICP-OES

A method based on ICP-OES coupled with microwave digestion was established to determine A1, Ba, Cd, Cr, Cu, Mn, Mo, Ni, Pb, Sn, Sr and Zn in atmosphere and waste gas particulate matter. The microwave digestion conditions and 1CP-OES analytical conditions were optimized. The detection limits of the method were determined： the detection limits of metals were all below 0.04 mg/L; the precision determination showed the relative standard deviation of metals was 2.59%-7.14%; the accuracy determination showed the recovery rates of metals by membrane and in reference material were 89.6%-119% and 85.1%-107%, respectively. The method was applied to determine these metals of TSP and metals in stationary souce emission samples.