03-914978-00:1
145
Troubleshooting
Set Up the Transfer-Line and Trap-Temperature
Conditions
1. Set the transfer line temperature to 260 °C.
2. Set the trap temperature to 150 °C.
3. Set the manifold temperature to 35 °C.
Set Up the Mass Spectrometer Acquisition Method
To set up the mass spectrometer acquisition method with:
1. Set the mass range to 40 to 350 at a scan rate of 1 scan/sec.
2. Set the background mass to 39.
3. Set a filament/multiplier delay of 180 sec.
4. Set a peak threshold of 1 count.
5. Set a mass defect value of 0.
6. Specify electron ionization (EI Auto).
7. Turn cal gas OFF.
The COLTEST test mixture contains the following compounds at levels of 1 to
5 ng/
µ
L.
No. Compound
Formula
Integer
Weight
Quantitation
Mass
1 decane
C
10
H
22
142 57
2 1-octanol
C
8
H
18
O 130 69
3 undecane
C
11
H
24
156 71
4 nonanal
C
9
H
18
O 142 67
5 2,6-dimethylphenol
C
8
H
10
O 122 107
6 2-ethylhexanoic
acid
C
8
H
16
O
2
144 73
7 2,6-dimethylaniline
C
8
H
11
N 121 106
8
decanoic acid, methyl ester
C
11
H
22
O
2
186 74
9
undecanoic acid, methyl
ester
C
12
H
24
O
2
200 87
10 dicyclohexylamine
C
12
H
23
N 181 138
11
dodecanoic acid, methyl
ester
C
13
H
26
O
2
214 143
12 hexachlorobenzene
C
6
Cl
6
282
284
The following is a typical chromatogram for this test mixture. Note that 2,6-
dimethylphenol and 2-ethylhexanoic acid coelute normally on a DB-5 column,
depending on column and injector.
