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16
Figure 6
Smaller ID provides better detection limits. 0.25mm ID columns provide better signal-to-noise ratio.
(USEPAMethod 8080).
1. 2,4,5,6-tetrachloro-
m-xylene
2.
α
-BHC (
α
-HCH)
3.
γ
-BHC (lindane)
4.
β
-BHC (
β
-HCH)
5.
δ
-BHC (
δ
-HCH)
6. heptachlor
7. aldrin
8. heptachlorepoxide
9.
γ
-chlordane
10.
α
-chlordane
11. 4,4'-DDE
12. endosulfan I
13. dieldrin
14. endrin
15. 4,4'-DDD
16. endosulfan II
17. 4,4'-DDT
18. endrinaldehyde
19. methoxychlor
20. ensdosulfan sulfate
21. endrinketone
22. decachlorobiphenyl
On-column concentration:
16-160pg organochloride pesticidemixAB#2 (cat.#32292);
Oven temp.:
120°C (hold1min.) to 300°C (hold3min.)
@ 8.5°C/min.;
Inj. port:
Direct, Uniliner
®
sleeve (cat.# 20335), at 200°C;
Detector:
ECD, 300°CwithAnode Purge;
Dead time:
2.4min.;
Head pressure:
11.2psi (constant);
Flow rate:
0.64mL/min. @ 120°C, Helium.
Rtx
®
-CLPesticides2
30m, 0.25mm ID, 0.20µm (cat.# 11323)
Rtx
®
-CLPesticides
30m, 0.25mm ID, 0.25µm (cat.# 11123)
Figure 7
Fast screening of pesticides using hydrogen gas flowwith 15m columns.
1. 2,4,5,6-tetrachloro-m-
xylene
2.
α
-BHC (
α
-HCH)
3.
γ
-BHC (lindane)
4.
β
-BHC (
β
-HCH)
5.
δ
-BHC (
δ
-HCH)
6. heptachlor
7. aldrin
8. heptachlorepoxide
9.
γ
-chlordane
10.
α
-chlordane
11. 4,4'-DDE
12. endosulfan I
13. dieldrin
14. endrin
15. 4,4'-DDD
16. endosulfan II
17. 4,4'-DDT
18. endrinaldehyde
19. methoxychlor
20. ensdosulfan sulfate
21. endrinketone
22. decachlorobiphenyl
On-column concentration:
16-160pg organochloride pesticidemixAB#2 (cat.#32292);
Oven temp.:
115°C to 280°C (hold2min.)
@29°C/min.;
Inj. port:
Direct, Uniliner
®
sleeve (cat.#20335), at 200°C;
Detector:
ECD, 300°CwithAnode Purge;
Dead time:
0.73min.;
Head pressure:
4.5psi (constant);
Flow rate:
1.33mL/min. @120°C, Hydrogen.
Rtx
®
-CLPesticides2
15m, 0.32mm ID, 0.25µm (cat.# 11321)
Rtx
®
-CLPesticides
15m, 0.32mm ID, 0.50µm (cat.# 11136)
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