Rtx-440&Rtx-CLPesticides2
Columns: ASub-10-MinuteAnalysis
Time (figures 2a&2b).
Figure 2a shows a separation of 20 commonly analyzed organochlorine pesticides obtained
in less than 10minutes by using anRtx-440 column. Only alpha-chlordane and endosulfan
I (peaks 10& 11) are not separated to baseline. The advantage of this column pair is the
difference in selectivity. ThisRtx-CLPesticides2 columnwhen run under the given
conditions (figure2b) that achieve a sub-7-minute analysis time result in 60% resolution
versus the 80% peak resolution of theRtx-440/Rtx-XLB pair. The column exhibits good
thermal stability as indicated by the baseline between the initial temperature and the
maximum temperature of the program, 330°C. In a dual-column approach to this
application, anRtx-440 column can be pairedwithanRtx-CLPesticides2 column. The latter
columnwill provide an equally fast separation (figure 2b) andnear equivalent resolution,
witha reverse inelution order for endrin aldehyde and 4,4’-DDT (peaks 17&18).
