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本文研究Pb(Ⅱ)—BPR—CTMAB—Tween—80—Phen多元络合物显色反应的最佳条件,试验了常见离子的干扰情况,应用该体系光度法测定微量铅。在用M。一BPR—CTMAB体系测定钼时,观察到Pb(Ⅱ)与BPR不起显色反应,当引入过量的CTMAB时,则Pb(Ⅱ)与BPR显色反应立即进行,产生一种蓝色络合物,少量CTMAB存在下,则产生一种蓝色混浊溶液。在过量CTMAB存在下,该体系引入非离子表面活性剂(如TritonX—100、乳化剂OP、Tween—40等),使Pb(Ⅱ)—BPR—CTMAB体系有增溶增色效应,同时使体系瞬时反应完全。在Phen存在下,
In this paper, the best conditions for the color reaction of Pb (Ⅱ) -BPR-CTMAB-Tween-80-Phen complex were studied. The interference of common ions was tested. With M. When a BPR-CTMAB system was used to determine molybdenum, it was observed that Pb (Ⅱ) could not afford a color reaction with BPR. When an excessive amount of CTMAB was introduced, the color reaction of Pb (Ⅱ) with BPR immediately proceeded to produce a blue complex In the presence of small amounts of CTMAB, a blue turbid solution results. In the presence of excess CTMAB, the system introduced nonionic surfactants (such as TritonX-100, emulsifier OP, Tween-40, etc.) to solubilize the Pb (II) -BPR-CTMAB system, The reaction is complete. In the presence of Phen,