پديدآورندگان :
Sobhi Hamid Reza Department of Chemistry, Payame Noor University, Tehran, Iran , Esrafili Ali Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran , Ghambarian Mahnaz ghambarian.m@gmail.com Iranian Research and Development Center for Chemical Industries, ACECR, Tehran, Iran, , Behbahani Mohammad Faculty of Engineering, Shohadaye Hoveizeh University of Technology, Dasht-e Azadegan, Susangerd, Iran , Esrafili Leili Department of Chemistry, Tarbiat Modares University, Tehran, Iran
كليدواژه :
Hg(II) , Imide , based nanomagnetic sorbent , Dispersive solid phase extraction , Aquatic samples
چكيده فارسي :
Hg(II) has been regarded as one of the most hazardous substances because it may cause several health problems in humans and environmental samples [1, 2]. Therefore, an efficient extraction method leading to the determination of Hg(II) levels in various seems to be vital [3, 4]. In this research work, a nanomagnetic imide-based sorbent was synthesized through an imide-formation reaction and subsequently used as magnetic solid phase extracting agent for AAS measurement of Hg(II) concentration in several aquatic samples. It is noted that the nanosorbent was previously characterized by scanning electron microscopy, energy dispersive X-ray, X-ray diffraction and Fourier transform Infra-red techniques. Various factors affecting the sorption and desorption of the target ion were investigated and the optimized conditions were then applied for the trace detection of Hg(II). The calibration curve was linear over the concentration range of 0.5-25 µg L-1.The obtained assay accuracy in real sample analysis was in the range of 85-112%, while the precision varied in the range of 3.9-7.8%. Finally, the introduced method was successfully applied for the determination of low levels of Hg(II) in various real samples such as river, well and tap water.
