主题：【讨论】低温方法去除前处理过程中的油脂

Optimized method for the determination of organophosphorus pesticides in meat and fatty matrices
RenéK. Juhler

Abstract
A method was developed and optimized for determination of residues of organophosphorus pesticides (OPs) in meat and fatty matrices. The method was developed for the national Danish monitoring programme, whereby priority was given to simplify the clean-up, avoid use of toxic and harmful organic solvents and allow quantification at ppb level using gc with nitrogen-phosphorus detection (NPD). Homogenized meat was extracted using ethyl acetate, the co-extracted water being removed using anhydrous Na2SO4. The clean-up was done through fat precipitation by cooling the extract flowed by solid-phase extraction on C18 mini-columns. Pesticide residues were determined by gc-NPD using a DB1701 capillary column. The limit of detection was 1 to 20 ppb and limit of determination was 2 to 33 ppd and the method is feasible for control of fat-soluble OPs according to the maximum residue limits set by the European Communities. The method developed covers a broad polarity range from polar OPs, such as acephate and methamidophos, through medium polar OPs to non-polar pesticides, such as prothiofos.

Journal of Chromatography A
Volume 786, Issue 1, 24 October 1997, Pages 145-153

Low-temperature clean-up method for the determination of organophosphorus insecticides in olive oil
Lentza-Rizos, E. J. Avramidesa and Frédérique Cherasco
Abstract
A simple, extremely low-cost method using low-temperature lipid precipitation has been developed for the rapid analysis of virgin olive oil for organophosphorus insecticides and triazine herbicides commonly used in olive groves. The method gives good clean-up for gc analysis with nitrogen–phosphorus detection and recoveries between 77 and 104%, with RSD values of 7–16%. Matrix enhancement was observed for some pesticides and metabolites.

Journal of Chromatography A
Volume 912, Issue 1, 30 March 2001, Pages 135-142

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原文由 hotdoglet 发表:
Low-temperature clean-up method for the determination of organophosphorus insecticides in olive oil
Lentza-Rizos, E. J. Avramidesa and Frédérique Cherasco
Abstract
A simple, extremely low-cost method using low-temperature lipid precipitation has been developed for the rapid analysis of virgin olive oil for organophosphorus insecticides and triazine herbicides commonly used in olive groves. The method gives good clean-up for gc analysis with nitrogen–phosphorus detection and recoveries between 77 and 104%, with RSD values of 7–16%. Matrix enhancement was observed for some pesticides and metabolites.

Journal of Chromatography A
Volume 912, Issue 1, 30 March 2001, Pages 135-142

如果需要这三篇文献的全文可以到文献求助-应助版进行求助。

非常感谢这位高人的无私帮助，这些资料对我来说太好了，再次感谢。