Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1988-03-18
1989-06-06
Tokar, Michael J.
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386425, 422 64, B01L 302
Patent
active
048360384
ABSTRACT:
An automated sampler-injector apparatus and method of sampling, for taking samples from multiple sources and repetitively injecting small portions of a quantity sampled from a single source into a liquid chromatograph column for analysis. The apparatus comprises a syringe and injector tube forming a syringe loop for drawing a quantity of sample from a sample container. A carousel for positioning a selected sample container beneath the syringe loop is provided, and an injector valve having a sample loop therein is further provided for receiving portions of a quantity of sample from the syringe loop and retaining such portion in the sample loop and further transferring the portion of sample from the sample loop into a liquid chromatograph for analysis. The method comprises a procedure for utilizing the apparatus so as to repetitively inject portions of the sampled quantity into the valve, switching the valve from a load position to an inject position to inject the portion of sample into the liquid chromatograph, and repeating the process until the quantity of sample contained in the syringe loop is exhausted.
REFERENCES:
patent: 3530721 (1970-09-01), Hrdina
patent: 4068529 (1978-01-01), Konig
patent: 4311667 (1982-01-01), Gocho
patent: 4478095 (1984-10-01), Bradley et al.
patent: 4577515 (1986-03-01), Someya et al.
patent: 4756201 (1988-07-01), Uffenheimer
Aim Instruments Ltd.
Raevis Robert R.
Tokar Michael J.
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