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Introduction
The ta3000R Process Gas Analyzer is a trace level gas chromatograph
capable of detecting ppb concentrations of contaminants in sample gas
matrices. The system consists of a microprocessor controlled gas chro-
matograph utilizing Ametek's, Trace Analytical unique Reduction Gas
Detector (RGD) supplied by Ametek Process Instruments.
Functional Overview
I
n order to achieve specified performance, the ta3000R performs these
primary functions:
Carrier Gas Purification
A catalytic combustor is included as an integral component of the carrier
gas flow path. Reactive impurities are reduced to a level of less than 1
ppb.
Sample Introduction and Component Separation
Samples are introduced into the instrument via air actuated gas sampling
valves or manual injections. Components of interest are separated in a
1/8" Column(S) inside a heated, column oven.
Reduction Gas Detection
Species eluting from the RGD column set pass immediately into the
heated bed of mercuric oxide (HgO) and the photometric detector. Within
the HgO bed, the general reaction occurs:
X + HgO (solid) => XO + Hg (vapor)
where X is any appropriate reducing gas. The resulting mercury vapor
is quantified by means of an ultraviolet photometer located immediately
downstream of the mercuric oxide bed. The relative ease of measuring
mercury vapor at low concentrations lends the technique its inherent
sensitivity.
OVERVIEW
User Manual | 11
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