摘要
本法基于在微酸性（ｐＨ４～５）介质中，银（Ⅰ）与打萨宗生成内络盐显色络合物，被ＣＣｌ４（或氯仿、苯）定量萃取，呈黄色，λｍａｘＣＣｌ４为４６０ｎｍ，ε４６０为３０５×１０４Ｌ·ｍｏｌ－１·ｃｍ－１．方法操作简捷，具有灵敏度和准确度比较高等特点，在０１～２５ｍｇ／Ｌ范围，符合Ｌａｍｂｅｒｔ－Ｂｅｅｒ定律．
A highly sensitive,easily operating, and precise spectrophotometric method for the determination of Ag(Ⅰ) has been worked out in slight acidic medium(pH4～5) utilizing diphenylthiocarbazone as a chelating agent. The complex obtained is quantitatively extractable into carbon tetrachloride (chloroform or benzene), shown yellow. λ max CCl 4 =460nm, molar absorptivity ε 460 =3 05×10 4L·mol -1 ·cm -1 . It has been observed that LambertBeer′s Law is obeyed in the range of 0 1～2 5mg/L.The method has been applied for the determination of Ag(Ⅰ) in gold concentrate, the results are satisfactory.
出处
《烟台大学学报（自然科学与工程版）》
CAS
1999年第3期181-184,共4页
Journal of Yantai University(Natural Science and Engineering Edition)
关键词
金精矿
打萨宗
光度分析
银
gold concentrate,diphenylthiocarbazone,spectrophotometry,Ag
