Monitoring of trace amounts of heavy metals in different food and water samples by flame atomic absorption spectrophotometer after preconcentration by amine-functionalized graphene nanosheet
- سال انتشار: 1394
- محل انتشار: دومین کنفرانس ملی زئولیت ایران
- کد COI اختصاصی: NZEOLITE02_002
- زبان مقاله: انگلیسی
- تعداد مشاهده: 821
نویسندگان
Department of Chemistry, Damghan University, Damghan, ۴۱۱۶۷-۳۶۷۱۹, Iran.
چکیده
We are introducing graphene oxide modified with amine groups as a new solid phase for extraction of heavymetal ions including cadmium(II), copper(II), nickel(II), zinc(II), and lead(II). Effects of pH value, flow rates, type,concentration, and volume of the eluent, breakthrough volume, and the effect of potentially interfering ions were studied.Under optimized conditions, the extraction efficiency is > 97 %, the limit of detections are 0.03, 0.05, 0.2, 0.1, and 1 μgL−1 for the ions of cadmium, copper, nickel, zinc, and lead, respectively, and the adsorption capacities for these ionsare178, 142, 110, 125, and 210 mg g−1. The aminofunctionalized graphene oxide was characterized by thermogravimetricanalysis, transmission electron microscopy, scanning electron microscopy, and Fourier transform infrared spectrometry.The proposed method was successfully applied in the analysis of environmental water and food samples. Good spikedrecoveries over the range of 95.8–100.0% were obtained. This work not only proposes a useful method for samplepreconcentration but also reveals the great potential of modified graphene as an excellent sorbent material in analyticalprocesses.کلیدواژه ها
Amine-functionalized graphene oxide ; Solid phase extraction ; Preconcentration ; Heavy metalsاطلاعات بیشتر در مورد COI
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