Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1987-06-16
1989-06-06
Levy, Stewart J.
Measuring and testing
Sampler, sample handling, etc.
Capture device
B01L 302
Patent
active
048360376
ABSTRACT:
A sample metering valve for both liquid samples and slurry samples with entrained gas bubbles. The sample metering valve for liquids is comprised of a piston with sample chambers formed in the side thereof said piston moving freely into and out of a cylinder having an aperture matching the size of the piston. Sealing is provided by a seal which has no dead volume which cold flows under a spring bias to maintain the seal under various operating conditions. The sample metering valve for slurry samples includes a syringe embodiment having separately moving piston and valve in a cylinder. The syringe valve sucks up sample with a piston, isolates the sample with the valve and compresses the entrained gas bubbles with the piston. Another embodiment uses three, three way valves which are coupled to a pump and a means to compress the sample. The valves are operated to suck a portion of sample up into the tubes connecting the valves, isolate the sample from the sample container, compress the sample using the compressed gas and trap a known volume of the compressed sample in the tube between valves. The trapped sample is then flushed out of the system with diluent to prepare the sample for analysis.
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"An Apparatus for Sample Preparation in a Measurement and/or Control System and the Application of this Apparatus," Priority: Swiss, Aug. 28, 1986, Ciba-Geigy AG, Case 7-16068/CIT.
Messan Von Stoffspezifischen Groben in der Chemischen Produktion Erfahrungen, Trends, by Altermatt et al., 6 pages of photocopies, Sep. 1986.
Metzger Andre
Nau Vance J.
Nohl Andre J.
Ciba-Geigy Corporation
Levy Stewart J.
Raevis Robert R.
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