where A1, peak area of methanol or ethanol obtained
from GC analysis; A2, peak area of 2-pentanol or acetonitrile
obtained from GC analysis; W1, weight in lg of
methanol or weight in mg of ethanol used in analysis;
W2, weight in lg of 2-pentanol or weight in mg of acetonitrile
used in analysis.
The r2 values of two regression equations for determination
of RRF were found to be higher than 0.999.