This is a measure of the ability of a column to
separate two peaks. A resolution of 0.6 is
needed to separate a valley between two
peaks of equal heights. A value of 1.0 results in
2.3% overlap of two peaks of equal width and
is considered the minimum for a separation to
allow good quantitation. A resolution of 1.5 is an
overlap of only 0.1% for equal width peaks and
is considered sufficient for baseline resolution of
equal height peaks (Figure 6.6). The resolution
for a given stationary phase can be improved
by lengthening the column, thus increasing the N.