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Determination of Hg(II) in Environmental Water Samples by Dispersive Liquid Phase Microextraction Combined with Flame Atomic Absorption Spectrometry
Author(s) -
Bahar Soleiman,
Zakerian Razieh
Publication year - 2013
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201200218
Subject(s) - chemistry , detection limit , tap water , extraction (chemistry) , enrichment factor , analytical chemistry (journal) , reagent , atomic absorption spectroscopy , chromatography , trace amounts , solvent , mineral water , medicine , physics , alternative medicine , organic chemistry , quantum mechanics , pathology , environmental engineering , engineering , archaeology , history
Abstract In this study, a method of dispersive liquid phase microextraction combined with the flame atomic absorption spectrometry was proposed for the determination of trace Hg using diphenylthiocarbazone as chelating reagent. Several factors which have effect on the microextraction efficiency of Hg, such as pH, extraction and dispersive solvent type and their volume, concentration of the chelating agent, extraction time were investigated, and the optimized experimental conditions were established. After extraction, the enrichment factor was 68. The detection limit of the method was 45 ng mL −1 , and the relative standard deviation for eight determinations of 2 μg mL −1 Hg was 1.7%. The results for the determination of Hg in environmental water samples (tap water, well water, mineral water and Caspian sea water) have demonstrated the applicability of the proposed method.