Sample injector

Details Sample injector Sample injector

1979-04-19

1981-01-06

Swisher, S. Clement

Measuring and testing

Measuring vessel

73423A, G01N 112

Patent

active

042429099

ABSTRACT:
An apparatus is described for withdrawing liquid samples from vials and injecting them into a chromatographic column or other analyzing device, which minimizes wastage, cross contamination, and dilution of the samples, and which can be automated with a minimum of complexity. The apparatus includes a sample loop for receiving a sample, and then delivering the sample by means of an injector valve into the flow stream of a chromatographic column, wherein an outer end of the loop is detachably connected to the valve by a loop end seal. The outer loop end can be lifted from the loop end seal and dipped into a vial, and a syringe connected via the valve to the inner loop end can be operated to draw sample liquid into the loop. The outer loop end then can be lifted from the vial and reinserted into the loop end seal, and upon operation of the valve the outer loop end is connected into the flow stream that is injected into the column to carry the sample to the column.

REFERENCES:
patent: 3530721 (1970-09-01), Hrdina
patent: 3733909 (1973-05-01), Golovistikov
patent: 3916692 (1975-11-01), Abraham et al.
patent: 3918913 (1975-11-01), Stevenson et al.
patent: 3961534 (1976-06-01), Gundlefinger
patent: 4022065 (1977-05-01), Ramin et al.
patent: 4094196 (1978-06-01), Friswell
patent: 4182184 (1980-01-01), Bakalyar

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