Table 5:
Table 6:
Calibrationmixes and other referencematerials for oxygenates analysis.
ReferenceMaterial
Restek cat.# / lot#
Internal Standard&Surrogate StandardMix
cat.# 30240
lot#A025538
custom
lot# 03010401s
cat.# 30074
lot#A022472
CalibrationMix
cat.# 30475A lot#A020908
cat.# 30465
lot#A024826
cat.# 30006
lot#A024175
cat.# 30042
lot#A024616
QCSecond SourceCalibrationMix
cat.# 553595
lot#A025888
UnleadedGasoline (Unweathered)
cat.# 30096
lot#A022384
Non-OxygenatedUnleadedGasoline (Unweathered)
custom
lot#OFR-TK253
Efficient recovery of ppb oxygenates, using anRtx
®
-VMS column.
1ppm 1ppm
1ppm Non-oxygenated Gasoline
5-Point
5-Point
Method 5ppb Non-oxygenated Standard,
Composite
Curve
Curve
Blank Standard Standard
5ppbSpike Standard
Compound
(RF)
(%RSD)
(%Recov.) (%Recov.) (%Recov.)
(%Recov.) (%Recov.)
methyl-d3-
tert
-butyl ether (IS)
tert
-butyl alcohol (x5)*
0.13
17
93
90
methyl-
tert
-butyl ether
0.91
7
99
92
6.2ppb
diisopropyl ether
1.08
7
100
94
ethyl-
tert
-butyl ether
1.21
8
98
90
tert
-amyl-methyl ether
1.15
5
105
98
<D.L.
pentafluorobenzene (IS)
acetone (x2.5)*
0.05
12
62
<D.L.
N.D.
dibromofluoromethane (SS)
0.43
3
102
89
106
97
98
1,4-difluorobenzene (IS)
1,2-dichloroethane-d4 (SS)
0.22
6
103
111
102
100
102
toluene-d8 (SS)
1.02
4
101
108
98
97
98
toluene (CCC)
0.78
3
106
94.4ppb
89.6ppb 81.9ppb
bromofluorobenzene (SS)
0.45
2
91
103
90
90
95
chlorobenzene-d5 (IS)
chlorobenzene (SPCC)
1.06
6
108
ethylbenzene (CCC)
1.71
5
110
21.4ppb
24.9ppb 23.9ppb
1,4-dichlorobenzene-d4 (IS)
naphthalene
2.08
3
93
4.7ppb
8.8ppb
5.0ppb
*Compound added at 5 times or 2.5 times the concentration of other target analytes.
<D.L. - below detection limit. N.D. - not detected.
Column: Rtx
®
-VMS, 30m x 0.25mm x 1.4µm (cat.# 19915)
Conditions: given in text
Restek Corporation • (800) 356-1688 •
