【摘要】 本文采用多孔石墨探针直接采集大气微粒物质（ＡＰＭ）后，立即用石墨探针炉原子吸收法测定收集在探针上的ＡＰＭ中的镉。实验表明：峰面积吸光度与镉的浓度在０～５０μｇ／Ｌ呈良好的线性关系，镉的特征量和检出限（３σ）分别为２．４８和１．８６ｐｇ，其相对标准偏差为２．０６％（ｎ＝１１），分析标准参比材料，其回收率和相对标准偏差（ｎ＝１１）。分别为９０．１５～９９．２９％和４．０９％。方法准确、灵敏、快速、简便。更多还原

【Abstract】 After atmospheric particulate matter was directly collected with graphite probe filters,the trace cadmium in APM was determined by graphite probe furnace atomic absorption spectrometry.The results showed that the absorbance(peakarea mode)and the concentration of cadmium had a excellent linearity in the range of 0～50μg/L.The characteristic mass and detection limit(3σ)were 248 and 186 pg,respectively.Its relative standard deviation was 206%(n=11).The results of analysis of the National Bureau of standards of America,Standard Reference Material(SRM)No1648,Urban Particulate Matter,gave a recovery of 9015～9929% with RSD of 409%.The method proved to be accurate,sensitive,rapid and simple.更多还原