摘要
研究了锌（Ⅱ）与水杨基荧光酮－酒石酸盐－阳离子表面活性剂形成四元混配型络合物的显色反应，研究了络合物形成条件和光谱特性．试验结果表明，在ｐＨ＝８．３的硼砂－盐酸缓冲介质中，络合物最大吸收波长为５６３ｎｍ，表观摩尔吸光系数达１．４７×１０５Ｌｍｏｌ－１ｃｍ－１，锌含量在０～１０μｇ／２５ｍＬ范围内符合比耳定律．该法显色迅速，络合物稳定，显色后放置３ｈ，吸光度几无变化．所拟方法在草酸钠、硫脲等掩蔽剂存在下，用于水相直接测定环境水标样，大米粉标样及实物中的微量锌，结果满意．
A colour reaction of zinc with Salicyfluorone(SAF),Tartrate(Tart) and CTMAB has been studied by spectrophotometrically.It is shown that zinc can be formed a quaternary complex with the above reagents at pH 8.3.The complex is stable at least 3 h.The apparent molar absorptivity of the complex is about 1.47×10 5 at 563 nm,and the composition ratio of Zn(Ⅱ) to SAF to Tart is 1∶2∶1.Beer′s law is obeyed for zinc(Ⅱ) in the range of 0￣10 μg/25 ml.A simple and highly selective method has been successfully applied to the determination of zinc in food and environmental water samples.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
1997年第4期512-515,共4页
Journal of Inner Mongolia University：Natural Science Edition
基金
内蒙古自然科学基金
