铅、镉对人体健康的影响是众所周知的,迄今为止,尿铅、尿镉的浓度仍是环境评价、职业中毒的主要指标之一。以往尿铅、尿镉的测定多采用双硫腙比色法和火焰原子吸收法。其灵敏度都较低,操作繁杂费时。石墨炉原子吸收法具有方法简单、灵敏、快速、可靠的优点。但直接测定尿中铅和镉,复杂多变 The effects of lead and cadmium on human health are well known. So far, the concentrations of urinary lead and urinary cadmium are still the major indicators of environmental assessment and occupational poisoning. In the past urine lead and urine cadmium determination using dithizone colorimetric method and flame atomic absorption method. The sensitivity is low, complex and time-consuming operation. Graphite furnace atomic absorption method has the advantages of simple, sensitive, fast and reliable method. But direct determination of urinary lead and cadmium, complex and changeable