Liquid purification or separation – Processes – Chromatography
Patent
1987-11-12
1989-07-18
Therkorn, Ernest G.
Liquid purification or separation
Processes
Chromatography
73 611C, 2101982, 422 70, 436161, B01D 1508
Patent
active
048491101
ABSTRACT:
The invention relates to a liquid chromatography based on a very small liquid feeding rate, where a liquid sample containing components to be detected, such as anion species, is mixed with an eluting solution, the resulting liquid mixture is continuously passed through a separation column, whereby the components to be detected are held in the separation column, then a predetermined amount of an extraction liquid as an aliquot is injected into the stream of the liquid mixture, and the liquid mixture is continuously passed through the separation column after the injected extraction liquid has passed through the separation column. The thus obtained chromatogram has peaks corresponding to the consumptions of the components to be detected in the liquid mixture.
According to the present invention the unpractical problem that a very trace amount of a liquid sample has been so far injected when a flow rate of the eluting solution is low can be completely solved.
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Okada, "Formation Mechanism of Dip Peaks in Nonsuppressed Ion Chromatography" Anal. Chem. 1984, p. 56.
Iwabuchi Hitoshi
Takata Yoshinori
Hitachi , Ltd.
Therkorn Ernest G.
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