Galvanic Applied Sciences ProTech903, Operation Manual

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Revision 14
13 August 02, 2019
Section 1 ProTech903 H
2
S and Total Sulfur Analyzer
1.1 Overview
The Galvanic Applied Sciences ProTech903 H
2
S and Total Sulfur Analyzer is designed to
measure Hydrogen Sulfide (H
2
S) and total sulfur (with the optional total sulfur option) in up to
four gaseous streams.
1.2 Principle of Operation
When Hydrogen Sulfide (H
2
S) reacts with Lead Acetate (which is white), Lead Sulfide is
formed as shown in Equation 1-1.
Pb(CH
3
COO)
2
+ H
2
S

PbS + 2 CH
3
COOH 1-1
If a paper tape that has been impregnated with Lead Acetate is exposed to Hydrogen Sulfide,
brown stains will be seen on the tape. The rate of colour change on the tape is directly
proportional to the concentration of Hydrogen Sulfide in the gas stream. When the rate of
colour change is measured, the concentration of Hydrogen Sulfide in the gas stream can be
determined. The ASTM Methods used by the ProTech903 are
D 4084-94, D4323-97 and
D4468-95. Analysis of Hydrogen Sulfide in Gaseous Fuels (Lead Acetate Reaction Rate
Method).
The total sulfur option includes a high temperature oven that is used to convert sulfur
containing compounds to H
2
S using H
2
.
The analyzer can use two different analysis algorithms to determine the concentration of H
2
S
in the sample.
• Standard Analysis (Peak Detect ) - In the standard analysis method, the rate of stain
formation on the tape is monitored. The point at which the rate of stain is at a maximum
represents the concentration of H
2
S in the sample gas.
• Timed Analysis
. In the timed analysis algorithm the average rate of stain on the tape is
calculated over a fixed period of time.
1.3 Analyzer Configurations
The analyzer is available in one of three different configurations:
1.3.1 Hydrogen Sulfide Only
The hydrogen sulfide only configuration allows the user to measure the hydrogen sulfide
content of a gas stream.
1.3.2 Hydrogen Sulfide and Total Sulfur
The hydrogen sulfide and total sulfur configuration allows the user to measure the hydrogen
sulfide and the total sulfur content of a gas stream. In this case the analyzer is equipped with
a total sulfur conversion furnace which will convert any sulfur bearing compounds in the gas