Pre-concentration of cobalt (II) ions by cloud point extraction prior to the spectrophotometric determination
سال انتشار: 1400
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 230
فایل این مقاله در 9 صفحه با فرمت PDF و WORD قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ICCNRT04_057
تاریخ نمایه سازی: 20 مهر 1400
چکیده مقاله:
A simple, fast and environment-friendly cloud-point extraction (CPE) process was described for the determination of cobalt ion. The extraction of analyte involved the formation of the hydrophobic complex between cobalt ions and ammonium pyrrolidineditiocarbamate (APDC) and then its extraction into a surfactant-rich phase. ۱ ml ethanol was added to the surfactant-rich phase prior to its analysis by visible spectroscopy. The variables affecting extraction efficiency, such as sample pH, volume of surfactant, volume of APDC solution, amount of NaCl, centrifugation conditions, bath temperature and time were optimized. Under the selected optimized conditions, the calibration graph using the proposed method for cobalt was linear in the range of ۰.۵ - ۴.۵ mg L-۱ (r = ۰.۹۹۸۱). The precision (RSD) was ۳% (C = ۱ mg L-۱, n = ۸). The enrichment factor was found to be ۱۷ and the detection limit was ۰.۰۴۵ mg L−۱. The proposed method was successfully applied to the determination of cobalt ions in real samples
کلیدواژه ها:
نویسندگان
Zahra Habibi
Department of Chemistry, Faculty of Sciences, Arak University, Arak, Iran
Farzad Bamdad
Department of Chemistry, Faculty of Sciences, Arak University, Arak, Iran
Fatemeh Bagheri
Department of Chemistry, Faculty of Sciences, Arak University, Arak, Iran