I have milk digesta and I need to quantify free fatty acids using FAME with GCMS. Can I extract the lipid fraction by Folch method then inject directly without further extraction of the free fatty acid fraction from the lipid fraction?
You can try to precipitate your own fatty acids with calcium ions, filter, acidify and extract with chloroform.
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Chapter Fatty Acids: Structural and Quantitative Analysis
Article Direct Method for the Quantification of Free Saturated Fatty...
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