TY - JOUR
A2 - Afzali, Daryoush
AU - Karimi, Mohammad Ali
AU - Mohadesi, Alireza
AU - Hatefi-Mehrjardi, Abdolhamid
AU - Mohammadi, Sayed Zia
AU - Yarahmadi, Javad
AU - Khayrkhah, Azadeh
PY - 2014
DA - 2014/03/02
TI - Separation/Preconcentration and Speciation Analysis of Trace Amounts of Arsenate and Arsenite in Water Samples Using Modified Magnetite Nanoparticles and Molybdenum Blue Method
SP - 248065
VL - 2014
AB - A new, simple, and fast method for the separation/preconcentration and speciation analysis of arsenate and arsenite ions using cetyltrimethyl ammonium bromide immobilized on alumina-coated magnetite nanoparticles (CTAB@ACMNPs) followed by molybdenum blue method is proposed. The method is based on the adsorption of arsenate on CTAB@ACMNPs. Total arsenic in different samples was determined as As(V) after oxidation of As(III) to As(V) using potassium permanganate. The arsenic concentration has been determined by UV-Visible spectrometric technique based on molybdenum blue method and amount of As(III) was calculated by subtracting the concentration of As(V) from total arsenic concentration. MNPs and ACMNPs were characterized by VSM, XRD, SEM, and FT-IR spectroscopy. Under the optimal experimental conditions, the preconcentration factor, detection limit, linear range, and relative standard deviation (RSD) of arsenate were 175 (for 350 mL of sample solution), 0.028 μg mL−1, 0.090–4.0 μg mL−1, and 2.8% (for 2.0 μg mL−1, n=7), respectively. This method avoided the time-consuming column-passing process of loading large volume samples in traditional SPE through the rapid isolation of CTAB@ACMNPs with an adscititious magnet. The proposed method was successfully applied to the determination and speciation of arsenic in different water samples and suitable recoveries were obtained.
SN - 2090-9063
UR - https://doi.org/10.1155/2014/248065
DO - 10.1155/2014/248065
JF - Journal of Chemistry
PB - Hindawi Publishing Corporation
KW -
ER -