浮选预富集后分光光度法和原子吸收法测定淡水和海水中的镍（II）

Spectrophotometric and atomic absorption determination of Ni(II) in fresh and sea waters after preconcentration by flotation.

作者信息

Kabil M A, Ghazy S E, Shallaby M A, Lasheen M R, Amar N S

机构信息

Chemistry Department, Faculty of Science, Mansoura University, P.O. Box 15, Mansoura, Egypt.

出版信息

Anal Bioanal Chem. 1996 Jan;354(3):371-3. doi: 10.1007/s0021663540371.

DOI:10.1007/s0021663540371

PMID:15048466

Abstract

A highly selective and sensitive procedure for flotation separation followed by spectrophotometric determination, confirmed by AAS, of Ni(II) traces is proposed. The maximum flotation separation (100%) is achieved at approximately 25 degrees C in the pH range of 1-3 using sodium diethyldithiocarbamate (as a collector) and oleic acid surfactant. The floated (1 : 2) colored complex is measured spectrophotometrically at 430 nm over a concentration range of 0.5-4.0 microg/g with a molar absorptivity of 0.44 x 10(4) L mol(-1) cm(-1). The procedure was successfully applied for the separation and determination of Ni(II) in fresh and sea waters.

摘要

提出了一种用于痕量镍（II）浮选分离后分光光度法测定的高选择性和灵敏方法，并通过原子吸收光谱法进行了验证。使用二乙基二硫代氨基甲酸钠（作为捕收剂）和油酸表面活性剂，在约25℃、pH值为1 - 3的范围内可实现最大浮选分离率（100%）。浮选得到的（1 : 2）有色络合物在430 nm处进行分光光度测定，浓度范围为0.5 - 4.0 μg/g，摩尔吸光系数为0.44×10⁴ L mol⁻¹ cm⁻¹。该方法成功应用于淡水和海水中镍（II）的分离与测定。