tert-Butyl mercaptan & Dimethyl Sulfide (CH3)3CSH NO.77
77


Performance (Simultaneous detector tube)
Detector Tube TBM Tube DMS Tube

Measuring Range

1 to 15 mg/m3

1 to 15 mg/m3

Number of Pump Stroke

1

1

Correction Factor

1

1

Sampling Time

3 minutes per pump stroke

Detecting Limit

0.2 mg/m3 (n=1)

Color Change

Yellow Pink

 Pink Pale yellow

Reaction Formula

tert-Butyl Mercaptan Tube
TBM reacts with mercuric chloride to liberate
hydrogen chloride to discolor the indicator to pink.

Dimethyl Sulfide Tube
DMS reduces potassium permanganate
to discolor the reagent to pale yellow.
Coefficient of Variation 10% (for 1 to 5 mg/m3), 5% (for 5 to 15 mg/m3)
Shelf Life 2 Years
Corrections for
temperature & humidity		 Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10oC (50oF) or below.


Possible coexisting substances and their interferences (NOTE)

For tert-Butyl Mercaptan Tube

Substance

Concentration

Interference

Change color by itself

Hydrogen sulfide

 -

Plus error

Discolor to Pink

Mercaptans

 -

Plus error

Discolor to Pink


For Dimethyl Sulfide Tube

Substance

Concentration

Interference

Change color by itself

Olefins

 -

Plus error

Discolor to Pale yellow

Tetrahydrothiophene

 -

Plus error

Discolor to Pale yellow


Calibration gas generation TBM Tube:Diffusion tube method
DMS Tube:Permeation tube method


TLV-TWA TLV-STEL Explosive range
- - -

Copyright(c) 2001 GASTEC CORPORATION. All rights reserved.