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Matrix removal ability of several new types of Solid Phase Extraction (SPEs) column was tested. E-HyCu is made of new type of material, chemically-modified carbon fibers, and can remove food components, monoacylglycerols, tocopherols, and sterols, etc. Z-Sep+ and Z-Sep/C18 are also new types of materials that contain zirconium dioxide. Z-Sep+ and Z-Sep/C18 are used for high lipid samples as the dispersive SPE in the QuEChERS method. We evaluated these sorbents as filled up columns. In our previous study, we reported that when the analytical method based on the multiresidue method is applied, monoacylglycerols are the most significant components that cause a matrix enhancement effect on pesticides in food using GC-MS. These new types of SPEs could remove not only monoacylglycerols, but also fatty acids, tocopherols, flavonoids, and sterols. The matrix enhancement effects of approximately 260 pesticides spiked in brown rice extracts pretreated with these SPEs were dramatically reduced. © Pesticide Science Society of Japan

Decrease in the matrix enhancement effect on pesticides analysis with GC-MS using new types of solid-phase extraction column