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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 17, Number 2
JKCSEZ 17(2)
April 20, 1973 

Determination of Silver with Mercaptans (Ⅰ). Amperometric Titration of Silver with 2,5-Dimercapto-1,3,4-Thiadiazole

Mercapto 화합물에 의한 은의 정량 (제1보) 2,5-Dimercapto-1,3,4-Thiadiazol에 의한 은의 전류 적정
Young Gu Ha, Q. Won Choi

하영구, 최규원
회전백금전극을 지시전극으로하고 수은-요오드화수은(Ⅱ)을 기준전극으로하여 암모니아수용액에서 2.5-dimercapto-1,3,4-thiadiazole에 의한 은의 전류적정법을 연구하였다. 암모니아수용액에서 EDTA를 은폐제로 사용하여 여러 가지 이온들의 존재 하에 미량의 은을 직접 적정할 수가 있었으며 백금과 금 이온만이 방해하였다. 이 방법으로 미량의 은을 상대 오차 ±3%이내 정량할 수 있다.

An amperometric method has been developed for the titration of silver with 2,5-dimercapto-1,3,4,-thiadiazole in ammonical solution (1N) using rotating platinum electrode as an indicator electrode and the mercury-mercury (Ⅱ) iodide as reference electrode. Direct titration of milligram amount of silver (0.05-1.0mg) is possible in the presence of a number of foreign ions in ammonical solution containing ethylenediaminetetraacetic acid as masking agent under atmosphere. The interfering elements are gold and platinum. The milligram amount of silver can be determined by the proposed method within an error ±3 %.

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