ADV06-15_1-412

117 / 413

Figure 1 Using an Rxi®-624Sil MS column under optimized conditions assures good resolution with minimal downtime.
Column: Rxi®-624Sil MS, 30 m, 0.25 mm ID, 1.40 µm (cat.# 13868)
Sample: 8260A Surrogate Mix (cat.# 30240)
8260A Internal Standard Mix (cat.# 30241)
8260B MegaMix® Calibration Mix (cat.# 30633)
VOA Calibration Mix #1 (ketones) (cat.# 30006)
8260B Acetate Mix (revised) (cat.# 30489)
California Oxygenates Mix (cat.# 30465)
502.2 Calibration Mix #1 (gases) (cat.# 30042)
Conc.: 25 ppb in RO water
Injection purge and trap split (split ratio 30:1)
Inj. Temp.: 225 °C
Purge and Trap
Instrument: OI Analytical 4660
Trap Type: 10 Trap
Purge: 11 min. @ 20 °C
Desorb Preheat Temp.: 180 °C
Desorb: 0.5 min. @ 190 °C
Bake: 5 min. @ 210 °C
Interface Connection: injection port
Oven
OvenTemp: 35 °C (hold 5 min.) to 60 °C at 11 °C/min. to 220 °C
at 20 °C/min. (hold 2 min.)
Carrier Gas: He, constant flow
Flow Rate: 1.0 mL/min.
Detector: MS
Mode: Scan
Transfer Line Temp.: 230 °C
Analyzer Type: Quadrupole
Source Temp.: 230 °C
Quad Temp.: 150 °C
Electron Energy: 70 eV
Solvent Delay Time: 1.5 min.
Tune Type: BFB
Ionization Mode: EI
Scan Range: 36-260 amu
Instrument:
Agilent 7890A GC & 5975C MSD
Notes
Other Purge and Trap Conditions:
Sample Inlet: 40°C
Sample: 40°C
Water Management:
Purge 110°C, Desorb 0°C, Bake, 240°C
Peaks RT (min.)
1. Dichlorodifluoromethane
(CFC-12) 2.198
2. Chloromethane 2.459
3. Vinyl chloride 2.659
4. Bromomethane 3.226
5. Chloroethane 3.434
6. Trichlorofluoromethane
(CFC-11) 3.876
7. Diethyl ether (ethyl ether) 4.440
8. 1,1-Dichloroethene 4.909
9. 1,1,2-Trichlorotrifluoroethane
(CFC-113) 4.998
10. Acetone 5.029
11. Iodomethane 5.195
12. Carbon disulfide 5.323
13. Acetonitrile 5.637
14. Allyl chloride 5.715
15. Methyl acetate 5.723
16. Methylene chloride 5.981
17. tert-Butyl alcohol 6.234
18. Acrylonitrile 6.451
19. Methyl tert-butyl ether
(MTBE) 6.509
20. trans-1,2-Dichloroethene 6.512
21. 1,1-Dichloroethane 7.315
22. Vinyl acetate 7.359
23. Diisopropyl ether (DIPE) 7.407
24. Chloroprene 7.429
25. Ethyl tert-butyl ether (ETBE) 7.970
26. 2-Butanone (MEK) 8.193
27. cis-1,2-Dichloroethene 8.193
28. 2,2-Dichloropropane 8.193
29. Ethyl acetate 8.265
30. Propionitrile 8.276
31. Methyl acrylate 8.318
32. Methacrylonitrile 8.476
33. Bromochloromethane 8.507
34. Tetrahydrofuran 8.521
35. Chloroform 8.651
36. 1,1,1-Trichloroethane 8.843
37. Dibromofluoromethane 8.848
38. Carbon tetrachloride 9.026
39. 1,1-Dichloropropene 9.037
40. 1,2-Dichloroethane-d4 9.246
41. Benzene 9.262
42. 1,2-Dichloroethane 9.334
43. Isopropyl acetate 9.340
44. Isobutyl alcohol 9.421
45. tert-Amyl methyl ether
(TAME) 9.421
46. Fluorobenzene 9.598
47. Trichloroethene 9.976
48. 1,2-Dichloropropane 10.243
49. Methyl methacrylate 10.290
50. 1,4-Dioxane (ND) 10.299*
51. Dibromomethane 10.326
52. Propyl acetate 10.346
53. 2-Chloroethanol (ND) 10.368*
54. Bromodichloromethane 10.496
55. 2-Nitropropane 10.698
56. cis-1,3-Dichloropropene 10.904
57. 4-Methyl-2-pentanone
(MIBK) 11.026
58. Toluene-D8 11.148
59. Toluene 11.210
60. trans-1,3-Dichloropropene 11.407
61. Ethyl methacrylate 11.435
62. 1,1,2-Trichloroethane 11.585
63. Tetrachloroethene 11.662
64. 1,3-Dichloropropane 11.729
65. 2-Hexanone 11.749
66. Butyl acetate 11.837
67. Dibromochloromethane 11.921
68. 1,2-Dibromoethane (EDB) 12.035
69. Chlorobenzene-d5 12.412
70. Chlorobenzene 12.440
71. Ethylbenzene 12.507
72. 1,1,1,2-Tetrachloroethane 12.507
73. m-Xylene 12.612
74. p-Xylene 12.612
75. o-Xylene 12.935
76. Styrene 12.949
77. n-Amyl acetate 13.018
78. Bromoform 13.118
79. Isopropylbenzene (cumene) 13.226
80. cis-1,4-Dichloro-2-butene 13.268
81. 4-Bromofluorobenzene 13.385
82. 1,1,2,2-Tetrachloroethane 13.456
83. trans-1,4-Dichloro-2-butene 13.496
84. Bromobenzene 13.515
85. 1,2,3-Trichloropropane 13.526
86. n-Propylbenzene 13.565
87. 2-Chlorotoluene 13.657
88. 1,3,5-Trimethylbenzene 13.699
89. 4-Chlorotoluene 13.751
90. tert-Butylbenzene 13.965
91. Pentachloroethane 14.007
92. 1,2,4-Trimethylbenzene 14.010
93. sec-Butylbenzene 14.140
94. 4-Isopropyltoluene
( p-cymene) 14.254
95. 1,3-Dichlorobenzene 14.263
96. 1,4-Dichlorobenzene-D4 14.321
97. 1,4-Dichlorobenzene 14.340
98. n-Butylbenzene 14.579
99. 1,2-Dichlorobenzene 14.635
100. 1,2-Dibromo-3-chloropropane
(DBCP) 15.252
101. Nitrobenzene 15.407
102. 1,2,4-Trichlorobenzene 15.935
103. Hexachloro-1,3-butadiene 16.040
104. Naphthalene 16.196
105. 1,2,3-Trichlorobenzene 16.396
* ND = not detected; retention time
determined by wet needle injection
GC_EV1169
Analyze up to 36 runs per shift by syncing
instrument and purge and trap cycles.
Critical pairs resolved using an Rxi ®-624Sil MS column
under synchronized conditions:
Peak #s Compounds
26/29 2-butanone (MEK)/ethyl acetate
31/32 methyl acrylate/methacrylonitrile
41/42 benzene/1,2-dichloroethane
41/45 benzene/ tert-amyl methyl ether (TAME)
7
Website : E-mail : TelNo : 03 9762 2034 . . . in AUSTRALIA