Method for controlling an evaporative light scattering...

Details Method for controlling an evaporative light scattering... Method for controlling an evaporative light scattering...

2005-08-30

2005-08-30

Therkorn, Ernest G. (Department: 1723)

Liquid purification or separation

Processes

Chromatography

C210S656000, C210S198200, C073S061580, C250S574000, C436S161000

Reexamination Certificate

active

06936174

ABSTRACT:
Method allowing control of an evaporative light scattering detector which is coupled to a liquid chromatography column, substantially independently of the elution conditions for the chromatographic separation.A given adjustable constant calibrated volume of the flow which originates from the chromatography column is removed at a given adjustable frequency, this flow being constituted by an eluent which contains compounds to be analysed which have been dissolved therein, and the volume removed in this manner is transferred to a secondary circuit, to which the evaporative light scattering detector is connected, by being conveyed by means of an auxiliary pump with a specific carrier fluid which is independent of the eluent having a predetermined flow, and the successive fractions of the flow which originates from the chromatography column are mixed with the carrier fluid which conveys these fractions upstream of the evaporative light scattering detector.

REFERENCES:
patent: 6077438 (2000-06-01), Zambias et al.
patent: 6151113 (2000-11-01), O'Donohue et al.
patent: 6402946 (2002-06-01), Spraul et al.
patent: 2001/0038071 (2001-11-01), Nichols et al.
patent: 2002/0072126 (2002-06-01), Chervet et al.
patent: 1275961 (2003-01-01), None

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