Journal
GREEN PROCESSING AND SYNTHESIS
Volume 8, Issue 1, Pages 54-61Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/gps-2017-0171
Keywords
butyl phthalate; di-ethylhexyl phthalate; di-n-octyl phthalate; water analysis
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Funding
- Ministry of Higher Education Malaysia [FP042-2016]
- University of Malaya [PG020-2016]
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The preparation of magnetic solid adsorbents for solid phase extraction often involved time-consuming stepwise reaction and high-temperature reaction. In this study, the coating of silica and the functionalization of magnetite were performed in a single step at room temperature. The prepared solid adsorbent was phenyl functionalized magnetic adsorbent (Fe3O4@SiO2-Ph). The Fe3O4 @ SiO2-Ph was used for the determination of phthalates (butyl phthalate, butyl benzyl phthalate, di-ethylhexyl phthalate and di-n-octyl phthalate) in water. Under optimized conditions, this developed magnetic solid phase extraction method achieved the pre-concentration factor of 100, low method detection limit (0.62-1.02 mu g/l) and limit of quantitation (1.98-3.25 mu g/l), wide linear dynamic range (0.5-100 mu g/l) with good coefficient of determination (>0.9980) and good repeatability (relative standard deviation <5%) during the extraction of the selected phthalates. The developed method was also successfully applied to analyze drinking water, mineral water and lake water with good extraction efficiency (70%-102%) and a high degree of precision (<= 5%).
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