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Method 8081B: Organochlorine Pesticides Analysis by GC (Extended)

Seven EPA Methods on One Column Many labs extend the list of compounds tested using Method 8081B to include other organochlorine pesticides. Rtx-CLPesticides and Rtx-CLPesticides2 columns are ideal for these determinations and can be used in a parallel dual-column configuration to reliably quantify 38 commonly analyzed organochlorine pesticides, as well as many other compounds. Full separations are achieved between both columns and the unique, optimized selectivity allows additional compounds to be included. (Note that since extended compound lists vary among laboratories the lists compared here are not identical.)

Vendor Column Pair Analysis Time (min) Coelutions Restek Advantage
Restek Rtx-CLPesticides /
Rtx-CLPesticides2
24 / 23 1 / 2
  • Best balance of speed and selectivity.
  • All compounds are resolved on at least one column.
Competitor A column 1 / column 2 27 / 29 0 / 3
Competitor B column 1 / column 2 NDP / 16 NDP / 3
Comparison based on published competitor data. All columns tested were 0.32 mm ID. NDP = no data published

The unique selectivity of the Rtx-CLPesticides column pair allows easy separation of extended lists of organochlorine pesticides. View larger

PeaksConc.
(ng/mL)
1.1,2-Dibromo-3-chloropropane100
2.Hexachloro- cyclopentadiene100
3.Tetrachloro-m-xylene (SS)100
4.cis-Diallate500
5.Hexachlorobenzene100
6.trans-Diallate500
7.α-BHC40
8.γ-BHC40
9.β-BHC40
10.δ-BHC40
11.Heptachlor40
12.Aldrin40
13.Chlorpyrifos100
14.Isodrin100
15.Oxychlordane50
16.Heptachlor epoxide40
17.trans-Chlordane*40
18.2,4'-DDE100
19.trans-Nonachlor100
PeaksConc.
(ng/mL)
20.cis-Chlordane*40
21.Endosulfan I40
22.Captan100
23.4,4'-DDE100
24.Dieldrin80
25.2,4'-DDD100
26.Endrin80
27.Chlorobenzilate500
28.2,4'-DDT100
29.cis-Nonachlor100
30.4,4'-DDD80
31.Endosulfan II80
32.4,4'-DDT80
33.Endrin aldehyde80
34.Endosulfan sulfate80
35.Methoxychlor400
36.Mirex100
37.Endrin ketone80
38.Decachloro-biphenyl100
* For information regarding the nomenclature used for cis-chlordane and trans-chlordane, visit www.restek.com/chlordane-notice
Organochlorine Pesticides by EPA Method 8081B on Rtx-CLPesticides/Rtx-CLPesticides2 (extended list)
GC_EV1193
ColumnsRtx-CLPesticides2 30 m, 0.32 mm ID, 0.25 µm (cat.# 11324)
and Rtx-CLPesticides 30 m, 0.32 mm ID, 0.32 µm (cat.# 11141)
using Rxi guard column 5 m, 0.32 mm ID (cat.# 10039)
with deactivated universal “Y” Press-Tight connector (cat.# 20405-261)
SampleOrganochlorine pesticide mix AB #2 (cat.# 32292)
Organochlorine pesticide mix C #1 (cat.# 32296)
2,4,5,6-Tetrachloro-m-xylene (cat.# 32027)
Decachlorobiphenyl (BZ #209) (cat.# 32029)
Chlorpyrifos (cat.# 32212)
2,4'-DDE (cat.# 32099)
2,4'-DDD (cat.# 32098)
Chlorobenzilate (cat.# 32211)
Captan (cat.# custom)
cis-Nonachlor (cat.# custom)
Mirex (cat.# custom)
Oxychlordone (cat.# custom)
Diallate (cat.# custom)
Diluent:Hexane
Injection
Inj. Vol.:1 µL splitless (hold 0.3 min)
Liner:Cyclo double taper (4 mm) (cat.# 20896)
Inj. Temp.:250 °C
Oven
Oven Temp.:80 °C to 175 °C at 8 °C/min to 195 °C at 11 °C/min to 235 °C at 7 °C/min to 320 °C at 25 °C/min (hold 3 min)
Carrier GasHe, constant flow
Linear Velocity:28 cm/sec
DetectorMicro-ECD @ 330 °C
Make-up Gas Flow Rate:60 mL/min
Make-up Gas Type:N2
InstrumentAgilent/HP6890 GC
NotesThis chromatogram was obtained using an Agilent micro-ECD. To obtain comparable results, you will need to employ a micro-ECD in addition to confirmational dual columns connected to a 5-meter guard column using a “Y” Press-Tight connector.

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