Isopropyl alcohol CH3CH(OH)CH3
(i-C3H7OH)		 NO.113L


Performance

Measuring Range

25 to 50 ppm

50 to 800 ppm

Number of Pump Strokes

2

1

Correction Factor

1/2

1

Sampling Time

3 minutes per pump stroke

Detecting Limit

5 ppm (n=2)

Color Change

Pink Pale blue

Reaction Principle

Isopropyl alcohol reduces potassium dichromate to
form chromic sulfate, which is blue in color
C2H5OH + K2Cr2O7 + H2SO4 Cr2(SO4)3
Coefficient of Variation 15% (for 50 to 200 ppm), 10% (for 200 to 800 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.

Other substance measurable with this detector tube

Substance

Correction Factor

Pump Strokes

Measuring Range

Divinyl methoxysilane

0.05

2

2.5 to 40 ppm

Ethylene glycol MEE

1.25

2

62.5 to 1000 ppm

Ethylene glycol MEEAc

0.12

3

6 to 96 ppm

1-Methoxy-2-propanol

1.0

4

50 to 800 ppm

Propyl alcohol

1.3

1

65 to 1040 ppm

Vinyl trimethoxysilane

0.05

2

2.5 to 40 ppm
Ethylene glycol MBE by scale 2 30 to 1000 ppm
Ethylene glycol MME by scale 2 15 to 900 ppm

Ethylene glycol MMEAc

 by scale 2,4 20 to1300 ppm


Calibration gas generation Diffusion tube method


TLV-TWA TLV-STEL Explosive range
400ppm 500ppm 2 to 12.7%


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