547
GC CHROMATOGRAMS |
ENVIRONMENTAL
Volat i les
Volatiles by EPA Method 8260 on Rxi®-624Sil MS (30m, 0.25mm ID, 1.40μm)
Resolution of critical pairs, low
bleed, and high inertness make
this a great column for volatiles!
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
XIC — = m/z 43
— = m/z 72
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