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基于卟啉试剂ＴＡＰＰ与Ｐｂ￣（２＋）、Ｈｇ￣（２＋）在碱性介质中有灵敏的显色反应，建立了两次双波长分光光度法同时测定Ｐｂ、Ｈｇ的新方法，摩尔吸光系数分别为４．５９×１０￣５和４．３２×１０￣５ｍｏｌ￣（－１）·ｃｍ￣（－１）·Ｌ；可同时测定１：５～１０：１范围内的Ｐｂ和Ｈｇ，用于水中Ｐｂ和Ｈｇ的同时测定，结果满意。
Based on the sensitive chromogenic reaction of TAPP with Pb ~ (2+) and Hg ~ (2+) in alkaline media, a new method of simultaneous determination of Pb and Hg by dual wavelength spectrophotometry was established. The molar absorption coefficient Respectively 4.59 × 10 -5 and 4.32 × 10 -5 mol -1 cm -1 (-1) L; simultaneous determination of Pb and Hg in the range of 1: 5 to 10: 1 can be achieved with Simultaneous determination of Pb and Hg in water with satisfactory results.