Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Patent
1987-07-07
1990-05-15
Richman, Barry S.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
422 681, 422101, 422102, 422103, 436 18, 436 54, 436179, 436180, 366 65, 366169, G01N 110
Patent
active
049256289
ABSTRACT:
There is disclosed a sample preparation chamber for a system for preparing samples of various compositions for assay by liquid chromatography. The sample preparation chamber is includes a container having a threaded cap and a threaded, lightweight, translucent plastic cup. A stirrer/grinder shaft driven by a motor and connected to a propeller/grinder passes through the cap. The cup has a sloped bottom with a sump region, and a fill/empty pipe passes through the cap and has its outlet at or near the sump. A nozzle/fill pipe arrangement allows the walls to be washed down as liquid is pumped into the cup. A second fill pipe with its outlet spaced up from the bottom of the cup is also used, and a sample metering valve having an inlet in said cup is present. The sample metering valve is used to isolate a known volume of the sample from the rest of the sample for release back into the cup after the remaining sample has been pumped to waste for purposes of diluting the known volume of sample to a known concentration.
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Grimm Peter
Metzger Andre
Nau Vance J.
Nohl Andre J.
Ciba-Geigy Corporation
Kummert Lynn M.
Richman Barry S.
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