新卟啉试剂分光光度法测定锌  

Spectrophotometric Determination of Zine by New Porphyrin Reagent

作　　者：喻德忠 邹菁 

出　　处：《武汉化工学院学报》1998年第4期18-20,共3页Journal of Wuhan Institute of Chemical Technology

摘　　要：研究了用新卟啉试剂分光光度法测定微量锌的体系，在ｐＨ为６．８的缓冲液中，Ｚｎ（Ⅱ）与ＴＭＱ６Ｐ（四（Ｎ甲基６喹啉基）卟啉四碘化物）生成１∶１型黄色配合物．该配合物的最大吸收波长为４４０ｎｍ，表观摩尔吸光系数为１．７×１０５Ｌ／（ｍｏｌ·ｃｍ），０～２．５μｇ／２５ｍＬ服从线性关系，检出限为３．０ｎｇ／ｍＬ，体系获得了较高的灵敏度和很好的选择性，铜、铅、镍及锰不干扰．测定了铝合金标样及环境水样中的锌，结果满意．A spectrophotometric determination of zinc by quinolinylporphyrin has been studied. In pH6.8 buffer solution Zn(Ⅱ) react with TMQ 6P to form 1∶1 yellow complex. The complex exhibits an apparent molor absorptivity of 1.7×10 5 L/(mol·cm),the calibration curve is linear for 0￣2.5 μg/25mL,the determination limit is 3.0 ng/mL. This method has good sensitivity and excellent selectivity and its is satisfactority applied to determination zinc in standard alloy aluminum samles and environmental water samples.

关 键 词：锌 分光光度法 喹啉卟啉 试剂 

分 类 号：O657.3[理学—分析化学] O614.241[理学—化学]