摘要
在 Triton X-100及掩蔽剂存在下,新显色剂1-(2-咪唑偶氮)-2-萘酚-4-磺酸(简称 IANS)分光光度法连续测定 Cu^(2+)、Zn^(2+)的实验条件和方法。测定 Cu^(2+)、Zn^(2+)的 pH 分别在3.0和8.5。最大测定波长分别在530nm和520nm。摩尔吸光系数分别为2.06×10~4L·mol^(-1)·cm^(-1)和4.01×10~4L·mol^(-1)·cm^(-1)。Cu^(2+)、Zn^(2+)在0～20μg/25mL 服从比尔定律,测定的 Cu^(2+)和 Zn^(2+)之比允许在0.01～50之间.方法已用于头发及镁合金中微量 Cu^(2+)、Zn^(2+)的快速连续测定,结果满意。
In this paper,according to different pHfor the colour reaction of copper and zinc withthe new colour reagent IANS,the spectropho-tometric consecutive determination of copperand zinc in the presence of Triton X-100 andmasking agents has been investigated.Theoptimal pH for copper and zinc is 3.0 and 8.5,the determination wavelength 530nm and 520nm,the molar absorptivity 2.06×10~4L·mol^(-1)·cm^(-1)and 4.01×10~4L·mol^(-1)·cm^(-1) respectively.Beer's law is obeyed in the range of 0～20μg/25mL for both metals.This simple and rapidmethod has been applied to the spectrophoto-metric consecutive determination of copperand zinc in human hair and magnesium alloy.
出处
《化学试剂》
CAS
CSCD
北大核心
1993年第2期119-121,共3页
Chemical Reagents
关键词
IANS
分光光度
连续测定
铜
锌
1-(2-imidazolylazo)-2-naphthol-4-sulfonic acid
spectrophotometric consecutive determination
copper
zinc
