Spectrophotometric Determination of Trace Amounts of Cobalt and Copper with 3- (2′-Thiazolylazo)- 2,6- Diaminopyridine
作者:
BassemF. Shraydeh,
Ali.Z. Abu Zuhri,
Mohammad Hannoun,
期刊:
Spectroscopy Letters
(Taylor Available online 1992)
卷期:
Volume 25,
issue 7
页码: 1049-1055
ISSN:0038-7010
年代: 1992
DOI:10.1080/00387019208018214
出版商: Taylor & Francis Group
关键词: Cobalt;Copper;Spectrophotometric determination 3-(2′Thiazolylazo)-2,6-Diaminopyridine
数据来源: Taylor
摘要:
Sensitive methods for the determination of trace amounts of cobalt and copper by complexation with 3-(2′-Thiazolylazo)-2,6- diaminopyridine (2,6-TADAP) are described. Copper forms a 1:2 violet complex with the reagent having a molar absorptivity of 1.00 × 104L mol−1cm−1, Baer's law is obeyed over the range 0 −50.84 μg in the total volume of 10ml. Cobalt also forms a 1:1 green complex with a molar absorptivity of 1.07 × 104L mol−1cm−1and obeying Beer's law over the range 0 –23.57 μg in the total volume of 10 ml. The procedure is simple and rapid without any tedious extraction steps for copper and without oxidation of cobalt (II) to cobalt (III).
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