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近年来报道了在非离子表面活性剂存在下,用3,5-二溴-DMPAP、3,5-二氯-DPEAP、5-溴-PADAP、3,5-二溴-PADAP及在阴离子表面活性剂存在下,用3,5-二溴-PADAP测定锌。灵敏度都很高((ε1.20～1.31×10~5)。但将阴-非离子混合表面活性剂用于胶束光度法测定锌,尚未见报道。本文研究了在SDS-OP混合表面活性剂存在下,锌与3,5-二溴-PADAP的适宜显色反应条件。在pH 8.6硼砂缓冲溶液中,Zn(Ⅱ)-3,5-二溴-PADAP-SDS显色体系加入OP后,ε_(566)值由1.31×10~5提高到1.59×10~5,且pH范围展宽。在掩蔽剂存在下,该方法已用于人发和自来水、湘江水和工业废水中微量锌的直接测定,结果满意。
In recent years it has been reported that the use of 3,5-dibromo-DMPAP, 3,5-dichloro-DPEAP, 5-bromo-PADAP, 3,5-dibromo-PADAP and in the presence of nonionic surfactants Zinc was measured with 3,5-dibromo-PADAP in the presence of an active agent. (Ε1.20 ~ 1.31 × 10 ~ 5) .However, it has not been reported that the anionic-nonionic mixed surfactant is used to determine zinc by micellar spectrophotometry.In this paper, Zinc and 3,5-dibromo-PADAP in the presence of a suitable color reagent.In the buffer solution of pH 8.6 borax, Zn (Ⅱ) -3,5-dibromo-PADAP-SDS color system was added OP , the value of ε 566 increased from 1.31 × 10-5 to 1.59 × 10-5 and the pH range broadened.The method has been applied to human hair and tap water in the presence of masking agents.The trace amounts of zinc in Xiang River water and industrial wastewater Direct determination, the results are satisfactory.