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This video shows a rapid "cleanup" method using a DPX-WAX (weak anion exchange sorbent) tip. An acetonitrile solution of protein precipitated whole blood is rapidly processed in 60 seconds by aspirating the solution into the DPX-WAX tip, mixing the solution with the sorbent by aspirating air, and then dispensing the "clean" solution back into the tube. Note the comparison of with and without "cleanup" at the end of the video.
This tip is designed to remove fatty acids from sample solutions.
Although this video shows a whole blood extract, this method works well
at removing fatty acid interferences from gastric contents, tissue
specimens, grain products, and even cocoa bean extracts (which contains
over 50% fat).
An application in food safety (pesticides in food with high fat
content) can be found in the application notes on this website.
Products are available in 1 mL size for automation applications, and 5
mL size with semi-automation (required to be used with an extractor.
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