Duplex sampling apparatus and method

Patent · 31 December 1991

OSTI ID:868373

Brown, Paul E ^[1]; Lloyd, Robert ^[2]

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1. Pittsburgh, PA
2. West Mifflin, PA

An improved apparatus is provided for sampling a gaseous mixture and for measuring mixture components. The apparatus includes two sampling containers connected in series serving as a duplex sampling apparatus. The apparatus is adapted to independently determine the amounts of condensable and noncondensable gases in admixture from a single sample. More specifically, a first container includes a first port capable of selectively connecting to and disconnecting from a sample source and a second port capable of selectively connecting to and disconnecting from a second container. A second container also includes a first port capable of selectively connecting to and disconnecting from the second port of the first container and a second port capable of either selectively connecting to and disconnecting from a differential pressure source. By cooling a mixture sample in the first container, the condensable vapors form a liquid, leaving noncondensable gases either as free gases or dissolved in the liquid. The condensed liquid is heated to drive out dissolved noncondensable gases, and all the noncondensable gases are transferred to the second container. Then the first and second containers are separated from one another in order to separately determine the amount of noncondensable gases and the amount of condensable gases in the sample.

• Research Organization: Westinghouse Electric Corporation
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5127258
• OSTI ID: 868373
• Country of Publication: United States
• Language: English

Related Subjects

/73/95/96/
adapted
admixture
amount
amounts
apparatus
capable
components
condensable
condensable vapor
condensed
condensed liquid
connected
connecting
container
containers
cooling
determine
differential
differential pressure
disconnecting
dissolved
drive
duplex
duplex sampling
form
free
gaseous
gaseous mixture
gases
heated
improved
improved apparatus
independently
leaving
liquid
measuring
method
mixture
mixture components
noncondensable
noncondensable gas
noncondensable gases
pressure
pressure source
provided
sample
sampling
sampling apparatus
selectively
selectively connect
separated
separately
series
serving
single
source
specifically
transferred
vapors