Isobutyl alcohol (CH3)2CHCH2OH
(i-C4H9OH)		 NO.116


Performance

Measuring Range

10 to 150 ppm

Number of Pump Strokes

2

Correction Factor

1

Sampling Time

3 minutes per pump stroke

Detecting Limit

1 ppm (n=2)

Color Change

Yellow Pale blue

Reaction Principle

Isobutyl alcohol reduces potassium dichromate to
form chromic sulfate, which is blue in color
(CH3 )2CHCH2OH + K2Cr2O7 + H3PO4 Cr2(SO4)3
Coefficient of Variation 15% (for 5 to 50 ppm), 10% (for 50 to 150 ppm)
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

Alcohols

 -

Plus error

Produce similar stain by themselves.


TLV-TWA TLV-STEL Explosive range
50ppm - 1.7 to 10.6%


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