摘要
在吐温-80存在下,锌与琉氰酸盐、结晶紫生成兰绿色离子缔合物,可在水相分光光度测定,最大吸收波长为540nm,表观摩尔吸光系数为2.35×10~5L·mol^(-1)·cm^(-1),锌在0—9μg/25ml范围内服从比尔定律。方法应用于自来水和铝合金中微量锌的测定,简单、快速,结果满意。
In the presence of Tween-80,trace zinc associates with thiocyanate and crystal violet to form a blue-green ionic associate which can be determined by spectrophotometry.It shows a peak ab- sorption wavelength of 540nm and a molar absorptivity of 2.35×10~5L·mol^(-1)·cm^(-1).Beer′s law is obeyed when trace zinc is in the range of 0—9μg/25ml.Applying this simple and rapid method to the determination of trace zinc in tap water and aluminium alloy,the results are satisfactory.
出处
《华侨大学学报（自然科学版）》
CAS
1992年第2期188-190,共3页
Journal of Huaqiao University(Natural Science)
关键词
锌
分光光度法
硫氰酸盐
结晶紫
zinc,thiocyanate,crystal violet,spectrophotometry
