Process for flow injection extraction

Details Process for flow injection extraction Process for flow injection extraction

1983-04-04

1985-10-08

Turk, Arnold

Chemistry: analytical and immunological testing

Including sample preparation

Liberation or purification of sample or separation of...

422 82, 436 53, G01N 100, G01N 3508

Patent

active

045460884

ABSTRACT:
A process and an apparatus for flow extraction whereby a substance dissolved in a first solvent is extracted over to a second solvent which is insoluble in the first. The two solvents are brought together via two legs in a T-tube, and the mixture exits through the third leg, the cross-sectional areas of the legs being dimensioned to produce segmented flow with alternating plugs of the second and first solvents. The ratio between the cross-sectional areas of the tube legs for the first and second solvents is 2-8:1, preferably 4:1. Between the first and third legs carrying the confluent flows, the ratio between the cross-sectional areas thereof is reduced to 0.7-1.2:1, preferably 1:1, at a distance from the juncture which is 1-3 times the inner diameter of the third leg. The confluent flow is led through a spiral hose, producing a powerful extraction due to the counter-current turbulence.

REFERENCES:
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patent: 3640822 (1972-02-01), Hrdina
patent: 3695281 (1972-10-01), Leon
patent: 3726297 (1973-04-01), Heimann et al.
patent: 3743103 (1973-07-01), Isreeli et al.
patent: 4022575 (1977-05-01), Hansen
patent: 4212845 (1980-07-01), Stelling et al.

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