Preconcentration of Silver Using Solidification of Floating Organic Drop and Its Determination by Flame Atomic Absorption Spectroscopy

IF 3.5 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemical Methodologies Pub Date : 2019-09-01 DOI:10.33945/SAMI/CHEMM.2019.5.7

H. Noorizadeh, S. Abbasi

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引用次数: 3

Abstract

A simple, rapid and dispersive liquid–liquid microextraction-solidification of floating organic drop procedure was combined with ﬂame atomic absorption spectrometry and established for the determination of trace amounts of silver. 5-(4-dimethylamino-benzylidine) (Rhodenylene) ligand and 1-dodecanol were used as complexing agents and extracting solvents, respectively. The optimum extraction efficiency of silver was obtained after optimization of the pH, concentration of ligand, the nature and amount of solvent extraction, salt increase effect, extraction time, extraction temperature and stirring rate. The effects of various ions on the recovery of Ag were also investigated. The limit of detection defined as 3SB/m was 1.55 ngL−1. The sensitivity for three eight measurements of 10 and 100 μgL−1 of silver was 1.55 ngL−1. The relative standard deviation (RSD) for the measurements of 0.20 μgL−1 of silver was ±2.3%. Water well, mineral water and urban drinking water samples were analyzed for Ag amount. The microextraction method was satisfactorily used for the determination of Ag in various environmental waters.

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有机悬浮液凝固预富集银及其火焰原子吸收光谱法测定

建立了一种简便、快速、分散的液液微萃取-凝固有机浮液法与火焰原子吸收光谱法相结合的测定痕量银的方法。以5-(4-二甲氨基苄基)(Rhodenylene)配体和1-十二醇分别作为络合剂和萃取溶剂。通过对pH、配体浓度、溶剂萃取性质及用量、加盐效果、萃取时间、萃取温度、搅拌速率等因素的优化，获得了银的最佳萃取效率。研究了不同离子对银回收的影响。以3SB/m定义的检出限为1.55 ngL−1。测定10 μ l−1和100 μ l−1银的3 ~ 8次灵敏度为1.55 μ l−1。0.20 μgL−1银的相对标准偏差(RSD)为±2.3%。对井水、矿泉水和城市饮用水样品进行了银含量分析。微萃取法可用于各种环境水体中银的测定。

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来源期刊

Chemical Methodologies CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

3.10

自引率

1.80%

发文量