Assessment of Primary and Secondary Amine Adsorbents and Elution Solvents with or without Graphitized Carbon for the SPE Clean-Up of Food Extracts in Pesticide Residue Analysis
2007
He, Yan | Liu, Yan-Hong
Primary and secondary amine (PSA) is one of the most powerful solid-phase extraction adsorbent for clean-up of food matrices and multi-pesticide residue analysis. The present study investigates the influence of elution protocols on the capacity of PSA for removal of fatty acids and the root regarding poor recoveries of metamidophos and acephate. The uses of toluene, hexane and/or acetone in the elution severely reduce the capacity of PSA for removal of fatty acids. Water is essential in the elution for full recoveries of the polar pesticides. PSA cartridge alone, PSA/carbon serial cartridge design and the novel elution protocols have been developed for this kind of applications.
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