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Simultaneous determination of 17 phthalate esters in edible vegetable oils by GC ‐ MS with silica/ PSA ‐mixed solid‐phase extraction
Author(s) -
Wu PingGu,
Yang DaJin,
Zhang Liqun,
Shen XiangHong,
Pan XiaoDong,
Wang LiYuan,
Zhang Jing,
Tan Ying,
Feng Liang,
Ying Ying
Publication year - 2012
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201200462
Subject(s) - phthalate , detection limit , chemistry , chromatography , solid phase extraction , extraction (chemistry) , vegetable oil , diethyl phthalate , dimethyl phthalate , food science , organic chemistry
A quantified method for the determination of 17 phthalate esters ( PAE s) in edible vegetable oil by GC ‐ MS with the pretreatment of acetonitrile extraction and silica/ N ‐( n ‐ P ropyl)ethylenediamine‐mixed SPE column was established. By the quantification of internal standard of D 4 ‐ d i(2‐ethylhexyl) phthalate, a good linearity range of related 17 PAE s was observed. The correlation coefficient was ranged at 0.994∼1.000, and the standard lowest quantified level was 0.05∼0.15 mg/L. The spiking recoveries of 17 PAE s were 78.3∼108.9% with the relative standard deviations of 4.3∼12.1% ( n = 6). The method detection limits were 0.1∼0.2 mg/kg. Meanwhile, PAE s were determined in 30 plastic buckets of edible vegetable oil from supermarkets in H angzhou city of C hina. The survey of 30 oil samples showed d i(2‐ethylhexyl) phthalate ( DEHP ) had the 100% (30/30) detection rate. The levels of d iisobutyl phthalate with 86.7% (26:30), d i‐ n ‐butyl phthalate ( DBP ) with 70% (21:30) and d iethyl phthalate with 10% (3:30) were detected. It was worth note that DBP with 16.7% (5:30) samples and DEHP with 10% (3:30) samples were beyond the regular migrating limit, which indicated that more attention should be paid to the PAE s in oil with plastic package.