Hydrogen sulfide + Sulfur dioxide H2S+SO2 NO.45H
45H


Performance

Measuring Range

0.02 to 0.2%

0.2 to 4.0%

4.0 to 8.0%

Number of Pump Stroke

2 to 10

1

1/2

Correction Factor

1/2 to 1/10

1

2

Sampling Time

1 minute per pump stroke

Detecting Limit

0.002% (n=10)

Color Change

Brown Pale Yellow

Reaction Formula

Hydrogen sulfide and sulfur dioxide react with iodine to
produce hydrogen iodide which color is pale yellow.
H2S + I2 2HI + S
SO2 +I2 + H2O 2HI + H2SO4
Coefficient of Variation

10% (for 0.2 to 1 %), 5% (for 1 to 4 %)
Shelf Life 3 Years
Corrections for
temperature & humidity		 Unnecessary
Store the tubes at cool and dark place.


Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change color by itself
Reducing gases for
Sulfur compounds		 -

Plus error

Discolor pale yellow stain


Calibration gas generation High pressure gas cylinder method


TLV-TWA TLV-STEL Explosive range
- - -


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