Calibrated sample delivery apparatus accommodating offset error

Details Calibrated sample delivery apparatus accommodating offset error Calibrated sample delivery apparatus accommodating offset error

1976-02-19

1977-05-10

Swisher, S. Clement

Measuring and testing

Measuring vessel

G01N 110

Patent

active

040220656

ABSTRACT:
A sample measuring apparatus is disclosed. In the preferred embodiment, a syringe having a set of calibrations is used to collect a specimen. The syringe has a set of calibrations which are offset from actual zero. The extent of offset accommodates the connecting volume found in a sample injection valve between the end of the syringe's outlet and the front of the portion of the sample actually injected. This enables the sample to be injected into a high resolution liquid chromatography column when an injection valve is switched. This enables the injection of a specified calibrated sample. Moreover, sufficient sample is injected to overcome the connecting volume or offset occurring in the injection valve where a connecting volume in the valve captures and holds a certain portion of the specimen. This connecting volume is held to a practical minimum.

REFERENCES:
patent: 3827303 (1974-08-01), Shiina

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