restek-tnx14 - page 218

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Figure 48.
EPAMethod 8240 analysis using anRtx® -VMS column.Alcohols require scans below 35amu.
1. dichlorodifluoromethane
2. chloromethane
3. vinyl chloride
4. bromomethane
5. chloroethane
6. trichlorofluoromethane
7. ethanol
8. 1,1-dichloroethene
9. carbon disulfide
10. iodomethane
11. allyl chloride
12. methylene chloride
13. acetone
14. trans-1,2-dichloroethene
15. 1,1-dichloroethane
16. acrylonitrile
17. allyl alcohol
18. vinyl acetate
19. bromochloromethane
20. chloroform
21. carbon tetrachloride
22. propargyl alcohol
23. 1,1,1-trichloroethane
24. 2-butanone
25. benzene
26. propionitrile
27. methacrylonitrile
28. 1,2-dichloroethane-d4
29. isobutyl alcohol
30. 1,2-dichloroethane
31. trichloroethene
32. 1,4-difluorobenzene
33. dibromomethane
34. 1,2-dichloropropane
35. bromodichloromethane
36. methyl methacrylate
37. 1,4-dioxane
38. 2-chloroethanol
39. 2-chloroethyl vinyl ether
40. cis-1,3-dichloropropene
41. toluene-d8
42. toluene
43. pyridine
44. 4-methyl-2-pentanone
45. tetrachloroethene
46. trans-1,3-dichloropropene
47. ethyl methacrylate
48. 1,1,2-trichloroethane
49. dibromochloromethane
50. 1,2-dibromoethane
51. 2-hexanone
52. 2-picoline
53. chlorobenzene-D5
54. ethylbenzene
55. chlorobenzene
56. 1,1,1,2-tetrachloroethane
57. m-xylene
58. p-xylene
59. o-xylene
60. styrene
61. bromoform
62. 4-bromo-1-fluorobenzene
63. cis-1,4-dichloro-2-butene
64. 1,1,2,2-tetrachloroethane
65. 1,2,3-trichloropropane
66. trans-1,4-dichloro-2-butene
67. pentachloroethane
68. 1,3-dichlorobenzene
69. 1,4-dichlorobenzene
70. benzyl chloride
71. malononitrile
72. 1,2-dichlorobenzene
73. 1,2-dibromo-3-chloropropane
Instrumentation&Conditions Common toBOTHRUNS
Carrier gas: 1.3mL/min.@constant flow
Concentrator: Tekmar LSC-3000 Purge andTrap
Trap: Vocarb 3000 (typeK)
Purge: 11min.@40mL/min.@ambient temp.
Dry purge: 1min.@40mL/min. (MCS bypass)
Desorb preheat: 245 C
Desorb: 250 C for 2min., Flow 26mL/min.
Bake: 260 C for 8min.
Interface toGC: 0.32mm IDSiltek fused silica transfer line (cat. #10027)
1:20 split at injection port w/ 1mm ID sleeve.
GC: HP6890
Detector: HP5973MSD
Rtx ®-VMS 30m, 0.25mm ID, 1.40µm (cat.# 19915)
min. 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00
1
2
3 4 5 6
8-9
7
10
11 12
13
14
15
16
17
18
19
20
21,22
23
24
25 26-27
28,29
30
31,32
33
34 35
36,37
38
39 40
41 42
43
44-46
47
48
49
50
51
52
53-56
57,58
59,60
61
62,63
64 65,66
67 68 6970
71
72
73
1
2
3
4
6
7
8,9
10
11
12
13
14
15
16
17,18
19 20
21
22,
23
24
25-27
28,
29
30
31,32
33
34
35
36
37
38
39
40
41 42
43
44
45,46
47
48
49
50 51
52
53-55
56
57,58
60,61
59
62
63
65
66
64
67
68
69
70
72
71
73
min. 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00
5
methanol
slower run resolves these
Scan: 29-260amu
Increases responses for alcohols,
decreases responses for all other
analytes
Scan: 35-300amu
GC_EV00426
Top chromatogram:
Oven temp.: 40 C (hold 4min.) to 90 C@16 C/min. (no hold)
to 210 C@32 C/min. (hold 5min.)
Adjust dichlorodifluoromethane to a retention time of
2.27min.@40 C.
MSScanRange: 35-300amu
CompoundConcentrations, bymix: (in 5mLof ROwater)
Compounds at 100ppb (cat.# 30213, 30004, 30006, 30011, 30042)
Alcohols at 1ppm (cat.# 30214); 2-chloroethanol at 10ppm.
vinyl acetate at 500ppb (cat.#30216)
8240NitrileMix at 200ppb (cat.# 30215)
8240Mix 1Aat 300ppb (cat.# 30217)
8240Mix 2Aat 500ppb (cat.# 30218)
Bottom chromatogram:
Oven temp.: 45 C (hold 4min.) to 110 C@19 C/min. (hold 5min.) to
220 C@32 C/min. (hold 5min.)
Adjust dichlorodifluoromethane to 2.23min.@45 C.
MSScanRange: 29-260amu, for 2-chloroethanol response
CompoundConcentrations, bymix: (in 5mLof ROwater)
Compounds at 100ppb (cat.# 30213, 30004, 30006, 30011, 30042)
Alcohols at 1ppm (cat.# 30214) (seeMS scan)
vinyl acetate at 100ppb (cat.# 30216)
8240NitrileMix at 400ppb (cat.# 30215)
8240Mix 1Aat 300ppb (cat.# 30217)
8240Mix 2Aat 500ppb (cat.# 30218)