1-Butanol CH3CH2CH2CH2OH
(CH3(CH2)3OH)		 NO.114
114


Performance

Measuring Range

10 to 150 ppm

Number of Pump Strokes

3

Correction Factor

1

Sampling Time

3 minutes per pump stroke

Detecting Limit

1 ppm (n=3)

Color Change

Yellow Pale blue

Reaction Principle

n-Butyl alcohol reduces potassium dichromate to form chromic sulfate,
which is pale blue in color
CH3 ( CH2) 3OH+ K2Cr2O7 + H3PO4 Cr2(SO4)3
Coefficient of Variation 15% (for 2.5 to 30 ppm), 10% (for 30 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.


Calibration gas generation Diffusion tube method


TLV-TWA TLV-STEL Explosive range
- - 1.4 to 11.2%

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