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length
ID
df (µm)
cat.#
30m
0.53mm
3.0
18001
30m
0.32mm
1.8
18003
RestekTrademarks:
Rtx.
Other Trademarks:
Freon—E.I. du Pont deNemours&Co., Inc.
length
ID
df (µm)
cat.#
30m
0.53mm
2.0
18000
30m
0.32mm
1.2
18002
Rtx
®
-BAC1
Rtx
®
-BAC2
Elution Ret.
Elution Ret.
Order
Time Order Time
Compound
(min.)
(min.)
methanol
1
1.017
5
1.237
acetaldehyde
2
1.146
1
1.063
ethyl chloride
3
1.275
2
1.071
ethanol
4
1.299
8
1.648
diethyl ether
5
1.574
4
1.167
isopropanol
6
1.607 15
1.945
isoflurane
7
1.661 13
1.922
methylene chloride
8
1.805 11
1.849
Freon
®
113
9
1.864
3
1.145
enflurane
10
1.891 16
2.081
tert
-butyl alcohol
11
1.926 17
2.154
acetone
12
1.992 10
1.787
acetonitrile
13
1.997 20
2.553
n
-propanol
14
2.191 25
3.130
halothane
15
2.267 18
2.383
methyl
tert
-butyl ether
16
2.366
7
1.554
hexane
17
2.495
6
1.386
tert
-butyl nitrite
18
2.736
9
1.750
chloroform
19
2.870 27
3.290
sec
-butyl alcohol
20
2.962 30
3.793
isobutyl nitrite
21
2.973 12
1.853
sec
-butyl nitrite
22
3.059 14
1.939
isobutyl alcohol
23
3.460 32
5.100
tetrahydrofuran
24
3.736 24
2.845
methyl ethyl ketone
25
3.768 26
3.271
ethyl acetate
26
3.800 23
2.785
Rtx
®
-BAC1
Rtx
®
-BAC2
Elution Ret.
Elution Ret.
Order Time Order Time
Compound
(min.)
(min.)
carbon tetrachloride
27
3.842 21
2.565
1,1,1-trichloroethane
28
3.869 22
2.729
n
-butyl nitrite
29
3.879 19
2.469
benzene
30
4.186 28
3.392
n
-butyl alcohol
31
4.565 33
6.747
trichloroethylene
32
5.205 31
4.084
isoamyl nitrite
33
6.377 29
3.728
methoxyflurane
34
7.279 36
7.219
isoamyl alcohol
35
7.428 38
9.447
toluene
36
8.358 34
6.944
1,1,2-trichloroethane
37
8.498 39 10.138
methyl isobutyl ketone 38
9.510 37
7.964
tetrachloroethylene
39
9.681 35
7.081
chlorobenzene
40
11.810 41 11.012
ethylbenzene
41
12.279 40 10.704
p
-xylene
42
12.726 42 11.038
m
-xylene
43
12.727 43 11.046
o
-xylene
44
13.733 44 12.280
tetrachloroethane
45
14.106 50 16.968
isopropylbenzene
46
14.845 46 12.962
n
-propylbenzene
47
15.966 47 14.124
1,3,5-trimethylbenzene 48
16.565 48 14.711
decane
49
17.166 45 12.369
1,2,4-trimethylbenzene 50
17.586 49 15.904
butylbenzene
51
19.739 51 17.732
tetradecane
52
29.806 52 24.950
Results
All of the compounds involved in the study exhibited good peak
shape and responsewhen analyzed byGC on either stationary
phase. Both columnswere programmed to 240°Cwithout an ap-
preciable increase in stationary phase bleed, and they analyzed
some of the higher boiling point compounds found in the heav-
ier petroleum distillates. Each stationary phase exhibited a
unique selectivity for individual compounds. Coeluting com-
pounds on one stationary phasewere resolved on the compli-
mentary stationary phase.
Conclusions
Inhalant abuse can be detected accurately by analyzing biologi-
cal samples using headspace sampling combinedwith gas chro-
matography.When used in a dual-column setup, theRtx
®
-BAC1
andRtx
®
-BAC2 columns are very effective for identifying and
confirming the presence ofVOCs for detection of inhalant
abuse.
References
1. National Institute onDrugAbuse, ResearchReport Series, Inhalant
Abuse, June 6, 1996.
Table I: Inhalant RetentionTimes (Columns andConditions Listed inFigure 1)
Rtx
®
-BAC1GCColumns
Rtx
®
-BAC2GCColumns
Product Listing
