کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1227584 1494865 2016 6 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-standing chitosan film loaded with silver nanoparticles as a tool for selective determination of Cr(VI) by ICP-MS
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موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Self-standing chitosan film loaded with silver nanoparticles as a tool for selective determination of Cr(VI) by ICP-MS
چکیده انگلیسی


• Ecofriendly method for synthesis of silver nanoparticles and their incorporation in chitosan nanocomposite.
• Selective sorption of Cr(III) on self-standing chitosan film loaded with silver nanoparticles.
• Simple method for determination of Cr(VI) in surface waters usable in the routine analytical practice.

A fast, simple and sensitive method was developed for separation and speciation of Cr species using dispersive solid phase extraction prior determination by ICP-MS. The selective determination of toxic Cr(VI) in surface waters is achieved after separation of Cr(III) by sorption on self-standing chitosan film loaded with silver nanoparticles (CHS-AgNPs). Completely green synthetic procedure was used for the preparation of AgNPs, which includes d-(+) raffinose as a non-toxic, environmentally benign reducing and capping agent and NaOH as a base reaction catalyst. The raffinose-coated Ag NPs were blended with chitosan to form polyelectrolyte complex that was cast into stable self-standing film. The parameters affecting the extraction efficiency (pH, sorption time, sample volume) of nanocomposite film toward Cr(III) and Cr(VI) were carefully optimized. Effective separation of Cr species between solid and liquid phase is demonstrated by simply tuning the pH value of the sample solution. The analytical method developed is validated under optimized conditions - the detection limit of 0.02 μg L− 1 and determination limit of 0.06 μg L− 1 were achieved for both Cr species; the relative standard deviation varied from 3 to 5% for Cr concentrations in the sample solution over the range 0.05–5 μg L− 1. The accuracy is established by analyzing certified reference materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 129, November 2016, Pages 23–28
نویسندگان
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