TY - JOUR
T1 - Magnetic iron-cobalt/silica nanocomposite as adsorbent in micro solid-phase extraction for preconcentration of arsenic in environmental samples
AU - Magoda, Cuma
AU - Nomngongo, Philiswa N.
AU - Mabuba, Nonhlangabezo
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - A new method for separation/preconcentration of trace As in environmental samples by micro solid-phase extraction (μ-SPE) using CoFe2O4@SiO2 magnetic nanoparticles (MNPs) prior to ICP-OES determination, has been developed. The morphological characteristic of the magnetic nanomaterial was characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDS), and X-ray diffractometer (XRD). Optimal experimental conditions including pH, adsorbent mass, and eluent acid concentration were found to be 3, 100 mg and 5 mol L-1 HCl, respectively. The adsorption capacity of the MNPs of As was found to be 8.5 mg g-1. Under optimum conditions, the analytical limits of detection (LOD) and limits of quantification (LOQ) were found to be 2.8 and 9.2 μg L-1, respectively. The accuracy of the method was tested by analyzing certified wastewater (CWW-TM-D) and the recoveries were found to be greater than 90%. The method was successfully applied to the determination of trace amounts of As in river and tap water samples.
AB - A new method for separation/preconcentration of trace As in environmental samples by micro solid-phase extraction (μ-SPE) using CoFe2O4@SiO2 magnetic nanoparticles (MNPs) prior to ICP-OES determination, has been developed. The morphological characteristic of the magnetic nanomaterial was characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDS), and X-ray diffractometer (XRD). Optimal experimental conditions including pH, adsorbent mass, and eluent acid concentration were found to be 3, 100 mg and 5 mol L-1 HCl, respectively. The adsorption capacity of the MNPs of As was found to be 8.5 mg g-1. Under optimum conditions, the analytical limits of detection (LOD) and limits of quantification (LOQ) were found to be 2.8 and 9.2 μg L-1, respectively. The accuracy of the method was tested by analyzing certified wastewater (CWW-TM-D) and the recoveries were found to be greater than 90%. The method was successfully applied to the determination of trace amounts of As in river and tap water samples.
KW - Arsenic
KW - ICP-OES
KW - Magnetic nanoparticles
KW - Preconcentration
KW - Tap and river water
UR - http://www.scopus.com/inward/record.url?scp=84967006937&partnerID=8YFLogxK
U2 - 10.1016/j.microc.2016.05.005
DO - 10.1016/j.microc.2016.05.005
M3 - Article
AN - SCOPUS:84967006937
SN - 0026-265X
VL - 128
SP - 242
EP - 247
JO - Microchemical Journal
JF - Microchemical Journal
ER -
