Ethanol C2H5OH NO.112
112


Performance

Measuring Range

0.01 to 0.05%

0.05 to 2.5%

2.5 to 7.5%

Number of Pump Strokes

2

1

1/2

Correction Factor

0.2

1

3

Sampling Time

3 minutes per pump stroke

Detecting Limit

0.004% (n=2)

Color Change

Pink Pale blue

Reaction Principle

Ethyl alcohol reduces cromic acid to discolor pale blue stain.
C2H5OH + Cr6+ + H2SO4 Cr3+
Coefficient of Variation 15% (for 0.05 to 0.5 %), 10% (for 0.5 to 2.5 %)
Shelf Life 3 Years
Corrections for
temperature & humidity		 Temperature correction is necessary
Store the tubes at cool and dark place.


Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change color by itself

Carbon monoxide

 -

No effect

No discoloration

Carbon dioxide

 -

No effect

No discoloration

Alcohols

 -

Plus error

Produce similar stain


Calibration gas generation Static gas dilution method


TLV-TWA TLV-STEL Explosive range
1000ppm - 3.3 to 19%


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