DETector Engineering
&
Technology, inc.
486 N.Wiget Lane, Walnut Creek, CA 94598 USA
DET
telephone: (925) 937-4203
fax: (925) 937-7581
innovations in chemical detection
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CATALYTIC COMBUSTION IONIZATION DETECTION FORGC
selectivity for compounds containing chains of CH
2
functional groups in
PETROLEUM, BIOFUEL, and FAME (Fatty Acid Methyl Ester) samples
AUTO DIESELSAMPLE (Valero, 04/09, N. Calif.)
18
12
10
14
9
16
FlO
32768pA full scale
20
22
16
18
TID-i-Air
Air=60 Nitr.=i0mLlmin
n-alkanes
(Cx)
source heat=2.
20
2048pA full s
12
14
10
9
1
/42
x
=
8
j
+
i
L
r
40A
cale
1
d
TID-i -Nitrogen
a
Air=5 Nitr.=60 mLlmin
ion source heat=2.30A
64 pA full scale
The conventional FlO detected hundreds of
compounds in this diesel sample, while the hot
(300-400°C) TIO-1 ceramic in the Air environment
selectively ignited combustion ionization from
just Methylene (CH
2)
groups in the Linear Alkane
components of the sample.
cale
36
36
31
16 23
12
12
10
14
8
6
FAMEs MIXTURE
1
12
FID
2
3
4
14-22
6
+-+
1280 pA full
5
8
10
23·29
9
111 13
-. 30·37
6
7\
\
\
--
II
v--,
TID-i-AIR
256
pA
f.s.
T10-1 ion source
2.45 A, 90 V
TID-i-~
256pA f.s.
8
16 23 31 36
0-1
ion source
6
.50
A, 90 V
4
7
10
1/
7
14
30 36
6
3
1
f"-1.1
\
ru
I,
TI
2
TID-i detection of long chains of CH
2
groups in Fatty
Acid Methyl Esters (FAMEs). Mixture analyzed
contained both Saturated and Unsaturated FAME
compounds. TID-i-Air detected only the Saturates.
