Browse Prior Art Database

Dilution Meter for a Plasma Chromatograph

IP.com Disclosure Number: IPCOM000082620D
Original Publication Date: 1975-Jan-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Corl, EA: AUTHOR [+2]

Abstract

This is an inexpensive mechanical alternative to the conventional dilution flask that is used in analytical chemistry, for bleeding a controlled volume of unknown gas samples into a plasma chromatograph (PC).

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Dilution Meter for a Plasma Chromatograph

This is an inexpensive mechanical alternative to the conventional dilution flask that is used in analytical chemistry, for bleeding a controlled volume of unknown gas samples into a plasma chromatograph (PC).

The dilution meter consists of an accurately controlled, variable-speed motor 4, driving a gear box 6 which rotates a two-port, solid-plug stopcock 8. The carrier gas enters stopcock 8 from tube 10 which fits into a groove 18 cut in stopcock 8. The unknown (sample) gas enters only at port 2 from tube 14.

When tube 10 engages plug 1, carrier gas flow is interrupted just prior to entry of the sample gas at port 2. As the stopcock continues to rotate, tube 14 is disengaged from port 2, causing the sample gas to cease to flow, while tube 10 disengages from plug 1 causing the carrier gas to flow again.

Gas flow can be varied by varying the hole size of sample port 2, providing more than one port or varying the motor's speed.

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