Isopropyl acetate CH3CO2CH(CH3)2
(i-CH3CO2C3H7)		 NO.146


Performance

Measuring Range

20 to 500 ppm

Number of Pump Strokes

2

Correction Factor

1

Sampling Time

4 minutes per pump stroke

Detecting Limit

5 ppm (n=2)

Color Change

Yellow Blackish brown Pale blue after few minutes

Reaction Principle

Isopropyl acetate reduces cromic acid to produce blackish brown.
Coefficient of Variation

15% (for 20 to 100 ppm), 10% (for 100 to 500 ppm)
Shelf Life 2 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

Alcohols

 -

Plus error

Produce blackish brown
then turns to pale blue

Ketones

 -

Plus error

Esters

 -

Plus error


Calibration gas generation Diffusion tube method


TLV-TWA TLV-STEL Explosive range
250ppm 310ppm 1.8 to 8%


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