Ethylene oxide C2H4O NO.163LL


Performance

Measuring Range

0.1 to 5 ppm

5 to 10 ppm

Number of Pump Stroke

4

2

Correction Factor

1

2

Sampling Time

1.5 minutes per pump stroke

Detecting Limit

0.05 ppm (n=4)

Color Change

Yellow Pale orange

Reaction Formula

C2H4O 2HCHO
3HCHO + (NH2OH)3H3PO4 H3PO4
H3PO4+ Base Phosphate
Coefficient of Variation 15% (for 0.1 to 0.5 ppm), 10% (for 1 to 5 ppm)
Shelf Life 1 Year
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

Aldehydes

 1/10 times

Plus error

Discolor pale orange
Ketones - Plus error Discolor pale orange
Alcohols 1/10 times No effect No discoloration


Calibration gas generation Permeation tube method


TLV-TWA TLV-STEL Explosive range
1ppm - 3.6 to 100%


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