Determination of trace silver in water, wastewater and ore samples using dispersive liquid-liquid microextraction coupled with flame atomic absorption spectrometry

作者：Rastegarzadeh Saadat^*; Pourreza Nahid; Larki Arash

来源：Journal of Industrial and Engineering Chemistry, 2015, 24: 297-301.

DOI：10.1016/j.jiec.2014.09.045

• Silver
• Dispersive liquid-liquid microextraction
• 2-Mercaptobenzimidazole

A fast and reliable dispersive liquid-liquid microextraction (DLLME) method for the determination of trace levels of silver by flame atomic absorption spectrometry (FAAS) was developed. The method is based on highly-efficient separation and preconcentration of silver by the complex formation of Ag(I) with 2-mercaptobenzimidazole and extracted by DLLME procedure using carbon tetrachloride as extraction and acetone as disperser solvent. After establishment of a cloudy solution, the phase separation is achieved and Ag(I) is determined in the enriched phase by FAAS. The method yields a linear calibration curve in the concentration range of 1-100 ng mL(-1) of Ag(I), and the limit of detection is 0.41 ng mL(-1). The proposed method was successfully applied to determine the trace amounts of silver in water, radiology film processing wastewater and ore samples.

• 出版日期2015-4-25