I need to prepare plasma sample for Freeze-drying and Re-dissolved, than analysis by LC/GC MS, I have some questions :
- Does anyone have this kind of protocol ?
- between LC & GC MS which is better for me ?
- methanol, which % (M:H2O, vol/vol) is better for metabolites extraction?
- which solvent is better for Re-dissolve plasma when methanol was used before Freeze-drying?