Summary
The functions of gas sample injection and column backflushing have been combined in a chromatographic system incorporating switching valves only of the three port solenoid type, installed away from injected sample contact. The system pressures are dynamically adjusted during analytic cycles by a simple dome-loaded regulator network. A sulfur analysis (natural gas odorant) application is demonstrated which also includes a foreflush-to-vent sidestream. The coefficient of variation found for the target analytes was less than 0.8%.
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References
D. R. Deans, J. Chromatogr.18, 477 (1965).
D. R. Deans, J. Chromatogr.289, 43 (1984).
P. A. Hilling, P. A. Dawes, W. David, J. High Resolut. Chromatogr. Chromatogr. Commun.11, 353 (1988).
J. Å. Jönsson, J. Vejrosta, J. Novák, J. Chromatogr.236, 307 (1982).
J. M. Allen, R. K. M. Jayanty, Anal. Chem.59, 1882 (1987).
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Colson, E.R. Combined gas sample injection and column backflushing without multiport chromatography valves. Chromatographia 31, 95–97 (1991). https://doi.org/10.1007/BF02290504
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DOI: https://doi.org/10.1007/BF02290504