Measuring and testing – Sampler – sample handling – etc. – Analyzer supplier
Patent
1987-01-22
1988-06-14
Levy, Stewart J.
Measuring and testing
Sampler, sample handling, etc.
Analyzer supplier
7386418, 422100, G01N 100
Patent
active
047503734
ABSTRACT:
An adjustable volume pipette sampler and pressure-generating device comprises a barrel slidably and rotatably containing a cross-shaped plunger of radial flanges which is manually rotatable around its axis in the barrel, at least one of the radial flanges having open-ended slots or notches. A stop disc is rigidly secured on the top flange of the barrel in such a manner that it does not interfere with the vertical motion of the plunger shaft when its axial position is such that adjacent flanges of the plunger straddle the stop disc. Otherwise, the stop disc cooperates within the notches to stop vertical movement of the plunger at a selected position corresponding top a selected pipette volume.
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Article by Ronald E. Majors, entitled, "Sample Preparation for HPLC and Gas Chromatography Using Solid-Phase Extraction", vol. 4, No. 10 of LG-GC.
Levy Stewart J.
Raevis Robert R.
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