Two position rotary valve for injecting sample liquids into an a

Details Two position rotary valve for injecting sample liquids into an a Two position rotary valve for injecting sample liquids into an a

1975-09-02

1976-06-08

Swisher, S. Clement

Measuring and testing

Measuring vessel

G01N 110

Patent

active

039615340

ABSTRACT:
A two-position rotary valve for injecting a liquid sample into a stream of solvent flowing through a liquid chromatographic column, without interrupting solvent flow is disclosed. The valve is switchable between a load position and an inject position. Associated with the valve is a sample loop whose downstream end is connected to a needle cavity axially extending along the valve rotor. In the load position the upstream end of the sample loop is vented to the atmosphere. This facilitates the loading of the sample into the sample loop through the needle cavity at atmospheric pressure with a conventional syringe needle. After sample loading the syringe needle is replaced by a wire-like plug which together with a compressible seal are capable of withstanding high pressure in the needle cavity when the latter is switched to the inject position. In this position solvent flows through the sample loop and the needle cavity from the solvent source to the column, forcing the previously loaded sample onto the column.

REFERENCES:
patent: 3346486 (1967-10-01), Winter et al.
patent: 3827303 (1974-08-01), Shiina

Affiliated with

Also associated with

Rating

Two position rotary valve for injecting sample liquids into an a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two position rotary valve for injecting sample liquids into an a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two position rotary valve for injecting sample liquids into an a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1092562