Styrene C6H5CH:CH2 NO.124


Performance

Measuring Range

10 to 20 ppm

20 to 500 ppm

500 to 1500 ppm

Number of Pump Strokes

2

1

1/2

Correction Factor

1/2

1

3

Sampling Time

30 seconds per pump stroke

Detecting Limit

1 ppm (n=2)

Color Change

White Yellow

Reaction Principle

Styrene reacts with sulfuric acid fuming to form
a condensation polymer which is yellow stain.
C6H5CH:CH2+ H2S2O7 Condensation Polymer
Coefficient of Variation 15% (for 20 to 100 ppm), 10% (for 100 to 500 ppm)
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

Alcohols

0.5%

Plus error (Bleaching)

No discoloration

Esters

0.5%

Plus error (Bleaching)

No discoloration

Ketones

0.5%

Plus error (Bleaching)

No discoloration


Calibration gas generation Diffusion tube method


TLV-TWA TLV-STEL Explosive range
20ppm 40ppm 1.1 to 6.1%


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