空气铅含量的测定目前常采用双硫腙比色法和原子吸收法等［１］。双硫腙比色法灵敏度较低，实验操作较为复杂，而且要使用剧毒试剂（氰化钾）。原子吸收法测铅灵敏度高，准确度好，但仪器昂贵，不适宜基层推广。本文应用ＤＰＳＡ－３型微分电位溶出仪并参考有关资料［２～... Determination of lead in air now commonly used dithizone colorimetric method and atomic absorption method [1]. Dithizone colorimetric sensitivity is low, the experimental operation is more complicated, but also to use highly toxic reagents (potassium cyanide). Atomic absorption method lead detection sensitivity, accuracy, but the instrument is expensive, not suitable for grass-roots promotion. In this paper, DPSA-3 differential potentiometer dissolution apparatus and reference to the relevant information [2 ...