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Table 3 The partition coefficients (K values) of UstA in different solvent systems

From: Extraction and purification of ustiloxin A from rice false smut balls by a combination of macroporous resin and high-speed countercurrent chromatography

Solvent system Ratio
(v/v)
Settling time
(s)
K-value
Chloroform/Methanol/n-Butanol/H2O 4:3:0.2:2 17 0
Ethyl acetate/n-Butanol/H2O 4:1:5 12 0
Ethyl acetate/n-Butanol/Methanol/H2O 4:1:0.5:6 9 0
n-Heptane/n-Butanol/Methanol/H2O 2:4:1:4 11 0
MTBE/Acetonitrile/H2O 2:2:3 7 0
n-Butanol/Acetic Acid/H2O 4:1:5 23 0.13
n-Butanol/TFA/H2O 1:0.01:1 14 0.11
n-Butanol/TFA/H2O 1:0.02:1 13 0.35
n-Butanol/TFA/H2O 1:0.05:1 14 0.62