548
GC CHROMATOGRAMS |
ENVIRONMENTAL
Volat i les
Volatile Organics
US EPA Method 8260 (80 ppb Standard)
Rtx®-VMS
GC_EV00685
Column:
Rtx
®
-VMS, 30m, 0.25mm ID, 1.4µm (cat.# 19915)
Sample:
Calibration, internal standard, surrogate standard
mixes (cat.# 30475B, 30465, 30006, 30240, 30074)
Purge and trap conditions:
O.I. Analytical 4560 with 4551A Autosampler
Trap:
#10 (Tenax
®
/silica gel/carbon molecular sieve)
Purge time:
11 min.
Purge flow rate:
38mL/min.
Desorb flow rate: 32mL/min.
Desorb time:
1.0 min.
Bake time:
10 min.
Sample size:
10mL
Water management: 110°C purge, 0°C desorb, 240°C bake
Split ratio:
1:25
Temperatures:
Sample:
40°C
Trap:
20°C purge, 190°C desorb, 210°C bake
6-Port valve:
110°C
Transfer line:
110°C
Sparge mount:
45°C
Desorb preheat:
150°C
Valve manifold:
50°C
Other conditions:
pre-purge, pre-heat, dry purge OFF
Chromatography:
Inj. temp.:
250°C
Carrier gas:
helium, constant flow
Flow rate:
1.3 mL/min.
Dead time:
1.47 min. @ 35°C
Oven temp.:
35°C (hold 7 min.) to 90°C @ 4°C/min.(no hold)
to 220°C @ 45°C/min. (hold 1 min.).
Det.:
Agilent 5971A GC/MS
Transfer line temp.: 280°C
Scan range:
35-260amu
Tune:
PFTBA/BFB
*carbon dioxide
1. dichlorodifluoromethane
2. chloromethane
3. vinyl chloride
4. bromomethane
5. chloroethane
6. trichlorofluoromethane
7. diethylether
8. 1,1-dichloroethene
9. carbon disulfide
10. Freon
®
113
11. iodomethane
12. allyl chloride
13. methylene chloride
14. acetone
15.
trans
-1,2-dichloroethene
16. methyl-d3-
tert
-butyl-ether
17. methyl acetate
18. methyl-
tert
-butyl-ether
19.
tert
-butyl alcohol
20. acetonitrile
21. diisopropyl ether
22. chloroprene
23. 1,1-dichloroethane
24. acrylonitrile
25. ethyl-
tert
-butyl ether
26.
cis
-1,2-dichloroethene
27. 2,2-dichloropropane
28. bromochloromethane
29. chloroform
30. carbon tetrachloride
31. tetrahydrofuran
32. methyl acrylate
33. 1,1,1-trichloroethane
34. dibromofluoromethane
35. 1,1-dichloropropene
36. 2-butanone
37. benzene
38. propionitrile
39. methacrylonitrile
40. 1,2-dichloroethane-d4
41. pentafluorobenzene
42.
tert
-amyl-methyl ether
43. 1,2-dichloroethane
44. isobutyl alcohol
45. trichloroethene
46. 1,4-difluorobenzene
47. dibromomethane
48. 1,2-dichloropropane
49. bromodichloromethane
50. methyl methacrylate
51.
cis
-1,3-dichloropropene
52. 2-chloroethyl vinyl ether
53. toluene-d8
54. toluene
55. 2-nitropropane
56. tetrachloroethene
57. 2-bromo-1-chloropropane
58. 4-methyl-2-pentanone
59.
trans
-1,3-dichloropropene
60. 1,1,2-trichloroethane
61. ethyl methacrylate
62. dibromochloromethane
63. 1,3-dichloropropane
64. 1,2-dibromoethane
65. 2-hexanone
66. chlorobenzene-d5
67. chlorobenzene
68. ethylbenzene
69. 1,1,1,2-tetrachloroethane
70.
m
-xylene
71.
p
-xylene
72.
o
-xylene
73. bromoform
74. stryrene
75. isopropylbenzene
76. 4-bromo-1-fluorobenzene (SS)
77. bromobenzene
78.
cis
-1,4-dichloro-2-butene
79. 1,4-dichlorobutane
80.
n
-propylbenzene
81. 1,1,2,2-tetrachloroethane
82. 2-chlorotoluene
83. 1,2,3-trichloropropane
84. 1,3,5-trimethylbenzene
85.
trans
-1,4-dichloro-2-butene
86. 4-chlorotoluene
87.
tert
-butylbenzene
88. pentachloroethane
89. 1,2,4-trimethylbenzene
90.
sec
-butylbenzene
91.
p
-isopropyltoluene
92. 1,3-dichlorobenzene
93. 1,4-dichlorobenzene-d4
94. 1,4-dichlorobenzene
95.
n
-butylbenzene
96. 1,2-dichlorobenzene
97. 1,2-dibromo-3-chloropropane
98. nitrobenzene
99. hexachlorobutadiene
100. 1,2,4-trichlorobenzene
101. naphthalene
102. 1,2,3-trichlorobenzene
GC_EV00686
Acknowledgments: Purge & trap courtesy of O.I. Analytical.
free
literature
Analysis of Trace Oxygenates
in Petroleum-Contaminated
Wastewater, Using Purge-and-
Trap/GC/MS (US EPA Methods
5030B & 8260)
This 8-page note describes a
practical, effective approach to
monitoring oxygenates in
wastewater. We evaluated the
Rtx®-VMS stationary phase for
oxygenates recovery, adjusted
purge and trap conditions to
increase responses for oxy-
genates, and optimized GC
conditions to eliminate coelu-
tions of ion-sharing analytes.
The result is a sensitive, accurate
analysis for gasoline oxygenates
in wastewater, in the presence
of much higher total gasoline
content.
Download your free copy from
Applications Note
lit. cat.# 59856
restek
innovation
!
Good choice for alcohols &
oxygenates!
Website :
E-mail :
TelNo : 03 9762 2034 . . . in AUSTRALIA
Mar 2011
