عنوان	Solid phase extraction of trace amounts of cadmium (II) ions in water and food samples using iron magnetite nanoparticles modified by SDS and 2-mercaptobenzothiazole
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	cadmium, flame atomic absorption spectrometry (FAAS), magnetite nanoparticles (MNPs), 2-Mercapto benzothiazole (MBT), sodium dodecyl sulfate (SDS)
چکیده	A new, simple and rapid method for solid phase extraction and preconcentration of trace amounts of cadmium ions using 2-mercaptobenzothiazole/sodium dodecyl sulfate immobilized on magnetite nanoparticles (MBT-SDS-MNPs) was proposed. The method is based on the extraction of cadmium ions via complexation with MBT immobilized on SDS coated MNPs and their determination by flame atomic absorption spectrometry. The effect of different parameters such as pH, eluent type and concentration and volume, amounts of salt and adsorbent, contact time and interfering ions on the adsorption of cadmium ions were studied. Under optimized conditions, the calibration curve was linear in the range of 10–5,000 μg L 1. Detection limit and relative standard deviation of the proposed method were 0.009 μg L 1 and 2.2%, respectively. The adsorption data were analyzed by Langmuir and Freundlich isotherm models and a maximum adsorption amount of 24.80 mg g 1 and a Langmuir adsorption equilibrium constant (b) of 4.62 and Freundlich constant (Kf) 6.075 and (n) 2.391 were obtained. Finally, this adsorbent was successfully used for extraction of cadmium from water and food samples.
پژوهشگران	شهریار عباسی (نفر اول)، مهدی شنبه دهبالایی (نفر دوم)، حسین خانی (نفر سوم)