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1引言微量铅的测定方法有光度法、原子吸收法、极谱法等。铅（Ⅱ）-二溴茜素紫（DBV）络合物极谱行为未见报道。本文研究了在pH=6．7的0．023mol/L柠檬酸钠缓冲溶液中，铅（Ⅱ）-DBV络合物的极谱行为。结果表明：铅（Ⅱ）-DBV络合物在．0．51V（vsSCE）产生一灵敏的吸附还原波
1 Introduction Trace lead determination methods luminosity method, atomic absorption method, polarographic method. The polarographic behavior of lead (Ⅱ) -dibromo-alizarin violet (DBV) complexes has not been reported. In this paper, the polarographic behavior of lead (Ⅱ) -DBV complex in 0.023 mol / L sodium citrate buffer solution at pH = 6.7 was investigated. The results show that: Pb (Ⅱ) -DBV complex in. 0.51V (vsSCE) produces a sensitive adsorbed reduction wave