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Extracted ion chromatograms (XICs) of typical ions derived from detergent residues as found in TCL protein extracts after different acetone pellet treatments. In all cases protein pellets were solubilised by using the sTD method (i.e. 1% Na-DOC in 0.5M TEAB dissolution buffer). From top to bottom: Triton X-100 at 50 ppm used for comparison sake; single precipitation by acetone (pA); acetone precipitation plus acetone-wash step (pAwA); double precipitation by acetone (pApA).
