采用硝酸浸泡法消解采样滤膜,用钯作为基体改进剂,以石墨炉原子吸收法测定环境空气样品中的铅、镉。在优化灰化温度和原子化温度的条件下,当采样体积为60m3时,方法的检出限为铅0.65×10-6mg/m3、镉0.07×10-6mg/m3,样品回收率为铅在97.1%～105.3%、镉在96.6%～101.5%之间。 The sample filter was digested with nitric acid soaking and palladium was used as matrix modifier to determine lead and cadmium in ambient air samples by graphite furnace atomic absorption spectrometry. Under the optimal conditions of ashing temperature and atomization temperature, when the sample volume is 60m3, the detection limit of the method is 0.65 × 10-6mg / m3 for lead and 0.07 × 10-6mg / m3 for cadmium. The recovery rate of sample is Pb 97.1% ~ 105.3%, cadmium between 96.6% ~ 101.5%.