Sensitive spectrophotometric determination of Co(II) using dispersive liquid-liquid micro-extraction method in soil samples

被引：11

作者：

Hasanpour, Foroozan ^{[1
]}

Hadadzadeh, Hassan ^{[2
]}

Taei, Masoumeh ^{[1
]}

Nekouei, Mohsen ^{[1
]}

Mozafari, Elmira ^{[1
]}

机构：

[1] Payame Noor Univ, Dept Chem, Tehran 193954697, Iran

[2] Isfahan Univ Technol, Dept Chem, Esfahan 8415683111, Iran

来源：

ENVIRONMENTAL MONITORING AND ASSESSMENT | 2016年 / 188卷 / 05期

关键词：

Dispersive liquid-liquid micro-extraction; Alpha-benzoin oxime; Cobalt(II); Spectrophotometric determination; ABSORPTION SPECTROMETRIC DETERMINATION; CLOUD POINT EXTRACTION; WATER SAMPLES; TRACE COBALT; ICP-MS; MICROEXTRACTION; PRECONCENTRATION; NICKEL; COPPER;

D O I：

10.1007/s10661-016-5263-x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Analytical performance of conventional spectrophotometer was developed by coupling of effective dispersive liquid-liquid micro-extraction method with spectrophotometric determination for ultra-trace determination of cobalt. The method was based on the formation of Co(II)-alpha-benzoin oxime complex and its extraction using a dispersive liquid-liquid micro-extraction technique. During the present work, several important variables such as pH, ligand concentration, amount and type of dispersive, and extracting solvent were optimized. It was found that the crucial factor for the Co(II)-alpha benzoin oxime complex formation is the pH of the alkaline alcoholic medium. Under the optimized condition, the calibration graph was linear in the ranges of 1.0-110 mu g L-1 with the detection limit (S/N= 3) of 0.5 mu g L-1. The preconcentration operation of 25 mL of sample gave enhancement factor of 75. The proposed method was applied for determination of Co(II) in soil samples.

引用

页数：7

共 26 条

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