Abstract
A Raman multichannel system is described which is feasible for the on-line identification of fractions separated by gas chromatographic columns. In Raman multichannel systems, the sensor, i.e., the laser focus, is small enough and the possible recording times are short enough to avoid any affliction of the separation process, even with capillary columns in use. At the measurements described, capillary columns with a length of 15 m and an inner diameter of 0.25 mm were employed. The detection limit was at about 1 to 10 nl of one fraction corresponding to about 1 to 10% of the total amount of sample suited for capillary columns.
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References
1.
McFadden
W. H.
, Techniques of Combined Gas Chromatography/Mass Spectrometry: Applications in Organic Analysis . (Wiley , New York , 1973 ).
2.
Wolf
W. R.
, Anal. Chem. 48 , 1717 (1976 ).
3.
Griffiths
P. R.
, Appl. Spectrosc. 31 , 497 (1977 ).
4.
Kreuzer
L. B.
, Anal. Chem. 50 , 597A (1978 ).
5.
Ambrose
D.
Ambrose
B. A.
, Gas Chromatography (G. Newnes Ltd. , London , 1961 ).
6.
Fassel
V. A.
, Pure Appl. Chem. 30 , 655 (1972 ).
7.
D'Orazio
M.
Schrader
B.
, J. Raman Spectrosc . 2 , 585 (1974 ).
8.
Kato
Y.
Takuma
H.
, J. Chem. Phys. 54 , 5398 (1971 ).
9.
Schrötter
H. W.
Strey
G.
, in Proceedings of the VI Conference on Raman Spectroscopy, Bangalore , (1978 ), Vol. 1 , p. 179 .
10.
Junk
G. A.
, Int. J. Mass Spectrosc. Ion Phys . 8 , 1 (1972 ).
11.
Griffiths
P. R.
, Appl. Spectrosc. 31 , 284 (1977 ).
12.
Moenke
H.
Moenke-Blankenburg
L.
, Laser Micro-Spectrochemical Analysis (Hilger Ltd. , London , 1973 ).
13.
Hester
R. E.
, J. Raman Spectrosc . 7 , 74 (1978 ).
14.
Desty
D. H.
Douglas
A. A.
, J. Chromatogr. 142 , 39 (1977 ).
15.
Kiefer
W.
Bernstein
H. J.
Wieser
H.
Danylak
M.
, J. Mol. Spectrosc. 43 , 393 , (1973 ).