Liquid chromatograph

Details Liquid chromatograph Liquid chromatograph

2005-01-13

2008-03-25

Therkorn, Ernest G. (Department: 1797)

Liquid purification or separation

With means to add treating material

Chromatography

C210S656000, C210S659000, C422S070000

Reexamination Certificate

active

07347936

ABSTRACT:
A liquid chromatograph has switching valves as a flow passage switching mechanism and an automatic sampler as an injection section. The liquid chromatograph can switch, by switching the switching valves between a concentration flow passage for concentrating the sample injected by the automatic sample via a flow passage which connects the automatic sampler to the trapping column; a concentration analysis flow passage for separating and analyzing the concentrated sample on a per-composition basis which connects the trapping column to the analysis column; and a direct analysis flow passage by separating the sample on a per-composition basis which connects the automatic sampler to the analysis column.

REFERENCES:
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patent: 5458783 (1995-10-01), Levy et al.
patent: 6780325 (2004-08-01), Murata et al.
patent: 6802967 (2004-10-01), Masuda et al.
patent: 6942793 (2005-09-01), Ito et al.
patent: 2003/0168392 (2003-09-01), Masuda et al.
patent: 2005/0218055 (2005-10-01), Hayashi et al.
patent: 2002-372522 (2002-12-01), None
Machine Translation of Japan Patent No. 2002-372522, pp. 1-7.

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