食品中痕量铅测定法有双硫腙混色法〔1〕、双硫腙单色法〔2〕、石墨炉原子吸收分光光度法 ,其中以原子吸收分光光度法较为理想 ,但仪器价格昂贵 ,一般单位使用受到限制。本文提出的双波长等吸收法测定铅能很好地消除本底色的干扰 ,定量结果符合比尔定律 ,可直接测得样品中的铅 Determination of trace amounts of lead in foods with dithizone color mixing method 〔1〕, dithizone monochrome method 〔2〕, Graphite Furnace Atomic Absorption Spectrophotometry, which is better by atomic absorption spectrophotometry, but the instruments are expensive, General unit use is limited. The proposed dual-wavelength iso-absorption method for the determination of lead can well eliminate the interference of background color. The quantitative results accord with Bill’s law and can directly measure the lead