Evaluation of Polyvinyl Chloride Functionalized with ۳-(۲-Thiazolylazo)-۲,۶-diaminopyridineas a New Chelating Resin for On-line Pre-concentration and Determination of Traces of Cadmium in Real Samples by Flame Atomic Absorption Spectrometry
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ANALCH-8-1_004
تاریخ نمایه سازی: 16 بهمن 1401
Abstract:
In the present work, an on-line solid-phase extraction system is proposed for the preconcentration and accurate determination of trace amounts of cadmium(II) ions by flame atomic absorption spectrometry. The preconcentration of cadmium(II) ions was performed using polyvinyl chloride functionalized with ۳-(۲-thiazolylazo)-۲,۶-diaminopyridine in a minicolumn system. The adsorbed cadmium(II) ions were then eluted from the sorbent by the eluent. The important influencing parameters such as the sample solution pH, type and concentration of the eluent used for stripping cadmium(II) ions from the sorbent, flow rate of the sample and the eluent, and amount of adsorbent were investigated in detail. Under the optimum experimental conditions, the linear dynamic range of the method was found to be in the range of ۲.۰–۴۰.۰ µg L−۱ (with the determination coefficient equal to ۰.۹۹۸۷). The limit of detection and improvement factor were ۰.۷ µg L−۱ and ۵۲.۴, respectively. The inter assay precession (RSD%, n=۷) was in the range of ۰.۸-۴.۱% at the concentration levels of ۵.۰۰, ۹.۰۰, and ۲۵.۰ µg L−۱. The validated method was successfully employed for determination of cadmium(II) ions at trace levels in the spiked water and soil samples with satisfactory results.
Keywords:
Cadmium(II) , Solid-phase extraction , Preconcentration , Flame atomic absorption spectrometry , ۳-(۲-Thiazolylazo)-۲ , ۶-diamino pyridine , Polyvinyl chloride
Authors
Ghadamali Bagherian
College of Chemistry, Shahrood University of Technology, Shahrood, P. O. Box: ۳۶۱۵۵-۳۱۶, Iran
Amin Pourbahramian
College of Chemistry, Shahrood University of Technology, Shahrood, P.O. Box ۳۶۱۵۵-۳۱۶, Iran
Bahram Bahramian
College of Chemistry, Shahrood University of Technology, Shahrood, P. O. Box: ۳۶۱۵۵-۳۱۶, Iran
Mansour Arab Chamjangali
College of Chemistry, Shahrood University of Technology, Shahrood, P. O. Box: ۳۶۱۵۵-۳۱۶, Iran
Motahare Ashrafi
College of Chemistry, Shahrood University of Technology, Shahrood, P. O. Box: ۳۶۱۵۵-۳۱۶, Iran
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