Extraction method
Number of detected peaks
a
in polar phase
Number of detected peaks
a
in non-polar phase
Methanol
299
No phase separation
Biphasic-neutral
210
151
Biphasic-acidic
282
190
Biphasic-basic
216
251
a
The total peak number with the peak height cut off at 12,000.
Table 2:
Comparison of total detected peak numbers and the yields of intracellular metabolites extracted from different solvent systems.
