An improved method for the measurement of 3-monochloropropanediol esters by matrix solid-phase dispersionsupported liquid-liquid extraction

作者：Jiao, Bo; Hu, Hui; Shi, Aimin; Liu, Hongzhi; Liu, Li; Wang, Qiang^*; Fu, Wusheng; Adhikari, Benu

来源：International Journal of Food Science and Technology, 2017, 52(11): 2404-2411.

DOI：10.1111/ijfs.13524

• 3-Monochloropropanediol esters
• acid transesterification
• dispersed matrix solid-phase supported liquid-liquid extraction
• edible oil

3-Monochloropropanediol (3-MCPD) esters are contaminants produced from the high-temperature processing of edible oils. The accurate measurement of 3-MCPD using an easy-to-follow and reliable method that uses a readily available instrument is important. Here, we report an acid transesterification heptafluorobutyrylimidazole (HFBI) derivatisation method for the accurate measurement of 3-MCPD esters in edible oils. We developed a dispersed matrix solid-phase supported liquid-liquid extraction (DMSP-SLE) system to remove impurities. Both the transesterification and DMSP-SLE conditions were optimised. A good linear relationship was obtained within the range of 0.05-10 mg kg(-1) (R-2 >= 0.999) in both blank solvent and an oil sample. The limit of detection was 20.36 mu g kg(-1). The average recovery of the 3-MCPD esters spiked at 0.5, 1.0 and 2.0 mg kg(-1) into a blank oil matrix was in a range from 105.09 +/- 2.77% to 120.16 +/- 10.88%. The method we developed was further confirmed by performing detection on a Food Analysis Performance Assessment Scheme (FAPAS) sample.

• 出版日期2017-11
• 单位福州大学; 中国农业科学院