Preparation of a hydrophilic-lipophilic composite solid phase extraction material and application in food safety inspection

• Published in: Sepu Vol. 31; no. 9; p. 825
• Main Authors: Bao, James Jianmin, Xie, Dan, Sun, Chaohui, Li, Youxin, Wang, Junju
• Format: Journal Article
• Language: Chinese; English
• Published: China 01-09-2013
• Subjects: Alcoholic Beverages - analysis; Animals; Chromatography, High Pressure Liquid; Food Contamination - analysis; Food Safety; Meat - analysis; Solid Phase Extraction; Swine
• ISSN: 1000-8713
• DOI: 10.3724/SP.J.1123.2013.03002

A copolymer of divinylbenzene and N-vinyl pyrrolidone (DVB-NVP) was synthesized for the purpose of solid phase extraction (SPE). Its performance as an SPE resin was evaluated using six model compounds having different polarities. Aqueous samples containing those compounds were applied to SPE cartridges containing the aforementioned copolymer as well as the classic C18 and Oasis HLB for comparison, and the SPE processed samples were analyzed by using high performance liquid chromatography (HPLC) for quantitation. Then, the copolymer DVB-NVP was sulfonated to modify the surface properties. The surface modified materials were used to analyse complex samples. The results showed that DVB-NVP had high recoveries for the six compounds ranging from 95.55% to 101.08% which were better than those of the C18 and were comparable to those of Oasis HLB. In applying to real samples, the recoveries for dimethyl phthalate, diethyl phthalate and dibutyl phthalate in liquor were 102.55%, 102.99% and 102.11%, with the RSDs of 2.11%, 1.69%, 0.79% respectively. Similarly, the recoveries for clonidine and cyproheptadine in pork were 89.23% and 91.42% with the RSDs of 8.21% and 8.86%, respectively.