597
GC CHROMATOGRAMS |
ENVIRONMENTAL
Gasol ine Range Organics (GRO)
Texas UST: Alternate Boiling Point/Carbon Number Distribution Marker
Rtx®-5
1.
n
-hexane(C6)
2.
n
-octane(C8)
3.
n
-decane(C10)
4.
n
-dodecane(C12)
5.
n
-hexadecane(C16)
6.
n
-heneicosane(C21)
7.
n
-octacosane(C28)
8.
n
-pentatriacontane
9.
n
-hexatriacontane(C36)
Column:
Rtx
®
-5, 30m, 0.25mm ID, 0.50µm (cat.# 10238)
Sample:
1µL Alternate Boiling Point/Carbon Number Distribution Marker Stock
Solution (cat.# 31639), 200µg/mL each component in pentane
Carrier gas:
hydrogen @ 40cm/sec.
Oven temp.:
40°C (hold 2 min.) to 330°C @ 10°C/min. (hold 5 min.)
Inj. temp.:
250°C
Det. temp.:
330°C
Det.:
FID
GC_EV00691
Wisconsin GRO Mix, plus C12
Rtx®-502.2
6
1
2
3
4
7
9
10
5
8
min.
10
20
30
1. 3-methylpentane
2. 2,2,4-trimethylpentane (isooctane)
3. benzene
4. toluene
5. ethylbenzene
6.
m
-xylene
7.
o
-xylene
8. 1,2,4-trimethylbenzene
9. dodecane
10. naphthalene
FID
Column:
Rtx
®
-502.2, 105m, 0.53mm ID, 3.0µm (cat.# 10910)
Sample:
GRO Mix (WISC) + C12 (cat.# 30069)
Conc.:
200ppb each in 5mL of H
2
O.
Oven temp.:
40°C (hold 1 min.) to 100°C @ 5°C/min. to
240°C @ 8°C/min. (hold 8 min.)
Inj./det. temp.:
200°C/250°C
Carrier gas:
helium
Flow rate:
10mL/min.
Trap:
Tenax
®
, silica gel, charcoal
Purge:
12 min. @ 40mL/min.
Desorb preheat:
175°C
Desorb temp.:
180°C
Desorb time:
2 min.
Desorb flow:
10mL/min.
FID sensitivity:
16 x 10
-11
AFS
10
9
8
7 6
5
4
3
GC_EV00071
PID
min.
10
20
30
Website :
E-mail :
TelNo : 03 9762 2034 . . . in AUSTRALIA
Mar 2011
