摘要
本文报道在表面活性剂ＯＳ－１５存在下锌与ＰＡＮ的显色反应及其应用。实验表明，在ｐＨ６．８—７．８的磷酸盐缓冲介质中，形成的三元配合物最大吸收波长为５５６ｎｍ，表观摩尔吸光系数达到５．４２×１０４１·ｍｏｌ－１·ｃｍ－１，锌含量在０—１５０μｇ／５０ｍｌ浓度范围内遵守比耳定律。将该法应用于某些食品中锌含量的测定，结果比、较满意。
The color reaction between Zn(Ⅱ ) and PAN in the presence of surfsctant OS--15 and its application in food analysis were reported in this paper. The ternary complex has maximum obsorption at 556urn in pH6. 8--7. 8 phosphate buffer medium, and its molar absorptivity is 5. 42 × 1041. mol--1. cm--1. Beer's law is obeyed in concentration range of 0-150μg/50ml. This method can be applied to the spectrophotometric determinations of micro amounts and trace zinc in foodstuffs, and analysis result is relatively satisfactory.
出处
《陕西科技大学学报（自然科学版）》
1994年第2期100-104,33,共6页
Journal of Shaanxi University of Science & Technology
关键词
分光光度法
锌
测定
spectrophotometry, zinc, determination
