Optimizing the Analysis of Volatile Organic Compounds

58
Choosing Columns for Subsets of
Method 502.2/8021 Compound Lists
Table X shows the elution times for compounds
listed in EPA Method 502.2 under
the GC conditions given. Analysts monitoring
subsets of Method 502.2 compounds
may find one of these columns to be more
suitable for the analysis than a commonly
used volatile phase.
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Table X.
Elution times for Method 502.2 compounds on various Rtx ® GC columns.
Column: 60m x 0.53mm x 3.00 mdf
Flow: ~10mL/min., dead time 1.80 min.
Oven: 35 C (hold 9 min.) to 220 C @ 11 min. (hold 10 min.)
Elution Time in Minutes Rtx-VGC Rtx-502.2 Rtx-VRX Rtx-624 Rtx-1 Rtx-1701 Rtx-200 Rtx-35 Rtx-50
dichlorodifluoromethane 2.31 2.18 2.54 2.59 2.16 1.99 1.95 2.04 1.96
chloromethane 2.64 2.51 2.75 2.94 2.30 2.36 2.18 2.39 2.39
vinyl chloride 2.78 2.67 2.99 3.16 2.51 2.51 2.23 2.51 2.47
bromomethane 3.35 3.35 3.46 3.86 2.89 3.16 2.62 3.21 3.27
chloroethane 3.58 3.44 3.66 4.07 3.04 3.32 2.85 3.21 3.27
trichlorofluoromethane 3.83 3.91 4.50 4.56 3.80 3.45 2.85 3.46 3.25
1,1-dichloroethene 4.83 4.93 5.32 5.75 4.74 4.57 3.34 4.58 4.46
Freon ® 113 4.91 4.61 5.77 5.68 4.93 4.17 3.56 3.78 3.38
methylene chloride 6.10 6.02 5.68 7.39 4.62 6.64 3.97 6.07 6.40
trans-1,2-dichloroethene 6.49 6.78 7.07 8.07 5.85 6.68 4.20 6.40 6.59
methyl-tert-butyl-ether 6.80 6.67 7.68 8.21 6.28 6.34 4.88 5.76 5.52
tert-butyl alcohol 7.19 5.76 5.99 8.40 4.62 7.61 4.86 5.08 5.48
1,1-dichloroethane 8.10 8.08 7.74 9.74 6.16 8.68 5.54 8.00 8.30
cis-1,2-dichloroethene 9.80 10.14 9.47 11.51 7.59 10.75 6.12 10.27 10.50
2,2-dichloropropane 10.10 10.01 10.24 11.37 8.22 10.15 7.41 9.60 9.41
bromochloromethane 10.33 11.05 9.88 12.13 7.91 11.66 6.12 11.46 12.06
chloroform 10.61 10.65 10.11 12.38 8.21 11.79 5.69 10.66 11.02
carbon tetrachloride 10.87 12.31 12.60 12.87 11.39 11.26 6.44 11.80 11.72
1,1,1-trichloroethane 11.07 11.68 11.85 12.59 10.28 11.31 7.59 11.40 11.25
1,1-dichloropropene 11.39 12.09 12.31 12.98 10.89 11.67 7.79 11.74 11.62
benzene 11.97 12.72 12.70 13.43 11.13 12.44 8.66 12.86 12.95
1,2-dichloroethane 12.44 12.73 11.67 13.70 8.78 13.38 9.52 12.90 13.60
fluorobenzene 12.90 13.22 13.24 14.11 11.70 13.27 10.55 13.25 13.38
trichloroethene 13.24 14.08 14.09 14.83 12.89 13.79 9.52 13.93 13.98
dibromomethane 14.03 14.97 13.89 15.63 12.47 15.23 10.03 15.51 16.02
1,2-dichloropropane 14.25 14.44 14.00 15.39 12.51 14.83 12.04 14.54 14.77
bromodichloromethane 14.39 14.92 14.20 15.94 12.83 15.48 9.68 15.22 15.60
2-chloroethyl vinyl ether 15.48 15.57 14.92 16.52 13.80 16.08 13.32 15.81 16.01
cis-1,3-dichloropropene 15.54 15.96 15.46 16.76 14.18 16.21 13.19 16.20 16.36
toluene 15.95 16.53 16.74 17.23 15.48 16.30 13.55 16.58 16.57
tetrachloroethene 16.58 17.67 17.92 18.13 16.94 16.88 13.77 17.51 17.35
trans-1,3-dichloropropene 16.61 16.87 16.23 17.78 14.91 17.39 14.47 17.16 17.45
2-bromo-1-chloropropane 16.71 17.13 16.48 17.88 15.46 17.28 14.43 17.32 17.52
1,1,2-trichloroethane 16.91 17.13 16.45 18.10 15.13 17.76 14.23 17.49 17.74
dibromochloromethane 17.18 18.01 17.20 18.71 16.03 18.28 13.30 18.50 18.86
1,3-dichloropropane 17.36 17.57 16.86 18.38 15.33 17.99 15.64 17.91 18.10
1,2-dibromoethane 17.56 18.35 17.58 18.92 16.34 18.46 14.49 18.77 19.16
chlorobenzene 18.42 19.05 18.97 19.69 17.79 18.91 16.31 19.27 19.38
ethyl benzene 18.47 19.15 19.31 19.79 18.26 18.83 16.14 19.25 19.09
1,1,1,2-tetrachloroethane 18.53 19.13 18.87 19.83 17.78 19.14 16.02 19.29 19.39
m-xylene 18.69 19.28 19.62 19.98 18.48 19.02 16.42 19.27 19.17
p-xylene 18.71 19.28 19.62 19.99 18.48 19.02 16.45 19.27 19.17
1-chloro-2-fluorobenzene 19.08 19.44 19.14 20.20 18.16 19.50 17.28 19.61 19.67
o-xylene 19.37 20.01 20.22 20.66 19.07 19.74 17.26 20.07 20.02
styrene 19.45 20.04 20.10 20.69 18.93 19.92 17.44 20.25 20.33
bromoform 19.49 20.56 19.96 21.08 18.58 20.64 15.88 21.19 21.63
isopropyl benzene 19.86 20.60 20.77 21.23 19.80 20.20 17.54 20.54 20.35
bromobenzene 20.47 21.30 21.09 21.83 19.92 21.08 18.32 21.65 21.78
n-propyl benzene 20.51 21.22 21.43 21.89 20.46 20.87 18.20 21.19 20.99
1,4-dichlorobutane 20.56 20.71 19.95 21.54 18.94 21.14 19.02 21.01 21.16
1,1,2,2-tetrachloroethane 20.62 20.83 20.21 21.84 19.06 21.49 17.72 21.19 21.41
2-chlorotoluene 20.76 21.47 21.55 22.10 20.42 21.22 18.66 21.68 21.66
1,3,5-trimethylbenzene 20.81 21.52 21.88 22.17 20.75 21.15 18.50 21.42 21.31
1,2,3-trichloropropane 20.84 21.08 20.42 21.93 19.22 21.61 18.81 21.45 21.65
4-chlorotoluene 21.03 21.59 21.67 22.28 20.52 21.46 19.04 21.68 21.76
tert-butylbenzene 21.32 22.04 22.26 22.69 21.31 21.62 19.06 21.98 21.72
1,2,4-trimethylbenzene 21.42 22.11 22.44 22.78 21.32 21.79 19.15 22.09 22.02
sec-butylbenzene 21.60 22.38 22.59 23.04 21.69 21.95 19.16 22.29 22.04
p-isopropyl toluene 21.81 22.60 22.87 23.26 21.91 22.17 19.30 22.49 22.24
1,3-dichlorobenzene 21.95 22.77 22.66 23.33 21.54 22.49 19.87 22.95 23.03
1,4-dichlorobenzene 22.09 22.93 22.77 23.48 21.64 22.68 20.00 23.15 23.30
n-butylbenzene 22.47 23.25 23.46 23.92 22.53 22.85 20.12 23.18 22.89
1,2-dichlorobenzene 22.76 23.52 23.30 24.10 22.13 23.36 20.73 23.84 23.96
4-bromo-1-chlorobenzene 23.77 24.82 22.18 25.28 23.37 24.50 21.55 25.15 25.33
1,2-bromo-3-chloropropane 24.02 24.75 23.96 25.38 22.78 24.98 21.70 25.26 25.54
hexachlorobutadiene 25.03 26.37 26.42 26.82 25.55 25.53 22.42 26.41 26.15
1,2,4-trichlorobenzene 25.13 26.16 25.95 26.66 24.79 25.77 22.96 26.37 26.55
naphthalene 25.64 26.61 26.30 27.13 24.98 26.40 23.70 27.18 27.45
1,2,3-trichlorobenzene 25.94 27.04 26.63 27.57 25.41 26.72 23.81 27.46 27.65