tert-Butyl mercaptan (CH3)3CSH NO.75L

75L


Performance

Measuring Range

0.5 to 1 mg/m3

1 to 15 mg/m3

15 to 30 mg/m3

Number of Pump Stroke

2

1

1/2

Correction Factor

1/2

1

2

Sampling Time

1 minute per pump stroke

Detecting Limit

0.1 mg/m3 (n=2)

Color Change

Yellow Pink

Reaction Formula

tert-Butyl Mercaptan reacts with mercuric chloride to liberate
hydrogen chloride which discolors the indicator to purple.

(CH3)3CSH +
HgCl2 (CH3)3CS-HgCl
HCl + Basic compounds Chlorides

Coefficient of Variation 10% (for 1 to 4 mg/m3), 5% (for 4 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)

Substance

Concentration

Interference

Change color by itself

Hydrogen sulfide

-

Plus error

Discolors pink stain

Other mercaptans

-

Plus error

Discolors pink stain


Other substance measurable with this detector tube

Substance

Correction Factor

No. of pump strokes

Measuring range

2-Mercaptoethanol

0.5

1

0.5 to 7.5 ppm


Calibration gas generation Diffusion tube method


TLV-TWA TLV-STEL Explosive range
- - -


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