Determination of trace amounts of cobalt (II) by atomic absorption spectrometry method after solvent drop microextraction
- سال انتشار: 1388
- محل انتشار: اولین کنفرانس بین المللی منابع آب با رویکرد منطقه ای
- کد COI اختصاصی: ICWR01_145
- زبان مقاله: انگلیسی
- تعداد مشاهده: 2018
نویسندگان
Faculty of Chemistry, Shahrood University of Technology, Shahrood, Iran
Faculty of Chemistry, Shahrood University of Technology, Shahrood, Iran
چکیده
A simple, low cost and sensitive method based on solvent microextraction (SME) for separation/ preconcentration coupled with flam atomic absorption spectrometry was proposed for the determination of trace amounts of cobalt (II). The analytical procedure involved the formation of a hydrophobic complex by mixing the analyte solution with an 2-Nitroso-1-naphtol (2NP) solution. The effect of affenent parameters such as pH, concentration of ligand, kind of buffer, kind and volume organic solvent, extraction time, stirring rate of sample solution, temperature and ionic strength were investigated. Also effects of foreign ions were stadied. In the suitable conditions, the complex of cobalt-2NP entred into micro organic phase and separation of analyte from the matrix was achieved. Under the optimized chemical and instrumental conditions a linear calibration curve in the range of 10-400 μg L−1 , with detection limit 0.20 μg L−1 and enrichment facror of 25.83 were achieved, respectively the relative standard deviation for six replicate determination of 80, 160 and 300 μg L−1 of cobalt were %2.18, %1.73 and %2.33, respectively. The metod was successfully applied for determination of cobalt (II) in the natural and spiked water samples.کلیدواژه ها
Cobalt, 2-nitroso-1-naphtol, solvent drop microextraction, precincentration, flame atomic absorption spectroscopyمقالات مرتبط جدید
اطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.