Sample liquid dilution system for analytical measurements

Details Sample liquid dilution system for analytical measurements Sample liquid dilution system for analytical measurements

1991-07-25

1993-06-22

Housel, James C.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

422103, 422 81, 436179, 436180, 436174, 436 52, 436 53, B01L 1100, G01N 100

Patent

active

052215210

ABSTRACT:
A liquid dilution system which dilutes a sample to be analyzed with a carrier to supply a diluted sample-containing liquid to an analytical measurement apparatus of flow type. The inventive dilution system features simplicity and versatility as compared to conventional automatic apparatus with robot concept, and the present system comprises: a first carrier pump for feeding a first carrier; a sample injection unit for injecting the sample into the first carrier; a main passage for flowing a liquid from the sample injection unit to a detector unit of an analytical measurement apparatus; a branching device located downstream of the sample injection unit for forming a branched passage to remove a liquid mass partially from the main passage; a confluence unit located downstream of the branching unit for confluencing a second carrier; and a second carrier pump for feeding the second carrier to the confluence unit. Dilution and mixing of the sample with a carrier is done twice, once at the sample injection and then again at confluence.

REFERENCES:
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patent: 5080866 (1992-01-01), Petty et al.
J. Ruzicka et al., Analytica Chimica Acta, 114 (1980) pp. 19-44.
Clark et al., Analytical Chemistry, vol. 61, No. 15, pp. 1773-1778 (1989).

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