Additional file 8 of Comparison between 5 extractions methods in either plasma or serum to determine the optimal extraction and matrix combination for human metabolomics

Additional file 8. Table S4. Ratio of remaining proteins to total proteins in plasma and serum for all extraction methods. The remaining protein results were obtained after BCA assay and the values were in Table I. Total proteins in plasma and serum refer to concentration of 70.000 ug/mL. MeOH : methanol; MeOH:ACN : methanol combined with acetonitrile; ACN: acetonitrile; SPE : solid preparation extraction; ESI : electrospray ionisation; RP: reverse phase.