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5492022 
Journal Article 
Room temperature silanization of Fe3O4 for the preparation of phenyl functionalized magnetic adsorbent for dispersive solid phase extraction for the extraction of phthalates in water 
Benrabha, AMF; Tay, K 
2019 
Green Processing and Synthesis
ISSN: 2191-9550 
De Gruyter 
8 
1 
54-61 
English 
WOS:000459811200008 
The preparation of magnetic solid adsorbents for solid phase extraction often involved time-consuming stepwise reaction and higherature 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 (Fe 3 O 4 @SiO 2 -Ph). The Fe 3 O 4 @SiO 2 -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 μg/l) and limit of quantitation (1.98-3.25 μg/l), wide linear dynamic range (0.5-100 μg/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%). © 2019 Walter de Gruyter GmbH, Berlin/Boston. 
butyl phthalate; di-ethylhexyl phthalate; di-n-octyl phthalate; water analysis