Simultaneous determination of 17 phthalate esters in edible vegetable oils by GC-MS with silica/PSA-mixed solid-phase extraction.
A quantified method for the determination of 17 phthalate esters (PAEs) in edible vegetable oil by GC-MS with the pretreatment of acetonitrile extraction and silica/N-(n-Propyl)ethylenediamine-mixed SPE column was established. By the quantification of internal standard of D(4)-di(2-ethylhexyl) phthalate, a good linearity range of related 17 PAEs 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 PAEs 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, PAEs were determined in 30 plastic buckets of edible vegetable oil from supermarkets in Hangzhou city of China. The survey of 30 oil samples showed di(2-ethylhexyl) phthalate (DEHP) had the 100% (30/30) detection rate. The levels of diisobutyl phthalate with 86.7% (26:30), di-n-butyl phthalate (DBP) with 70% (21:30) and diethyl 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 PAEs in oil with plastic package.
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China.
PingGu
P
Wu
DaJin
D
Yang
Liqun
L
Zhang
XiangHong
X
Shen
XiaoDong
X
Pan
LiYuan
L
Wang
Jing
J
Zhang
Ying
Y
Tan
Liang
L
Feng
Ying
Y
Ying
D000327:Adsorption; D004952:Esters / Q000737:chemistry* / Q000302:isolation & purification; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010795:Phthalic Acids / Q000737:chemistry* / Q000302:isolation & purification; D010938:Plant Oils / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*
D004952:Esters; D010795:Phthalic Acids; D010938:Plant Oils; C032279:phthalic acid; D012822:Silicon Dioxide