TABLE I

Statistical Analysis of RRF Data for Compounds within a Defined RT Window

Statistical Parameter	Retention Time Window (Min)
Statistical Parameter	All	4–8	8–12	12–16	16–20	20–24	24–28	28–32	>32
Number	2393	211	331	450	412	333	304	193	159
Mean	0.6049	0.4416	0.5195	0.5376	0.5949	0.6722	0.7304	0.7296	0.6830
STDEV	0.30049	0.2327	0.2381	0.2431	0.2560	0.2950	0.3704	0.3325	0.3580
% RSD	49.7	52.7	45.8	45.2	43.0	43.9	50.7	45.6	52.4
Minimum	0.100	0.119	0.1103	0.102	0.100	0.102	0.108	0.106	0.101
Maximum	2.300	1.7876	1.39	1.69	1.445	1.915	2.300	1.778	1.655
Median	0.5680	0.3970	0.4840	0.5135	0.573	0.675	0.7085	0.735	0.617

% RSD, percent relativestandard deviation ; RRF, relative response factor; RT, retention time; STDEV, standard deviation.