Hexane CH3(CH2)4CH3 NO.102H
102H


Performance

Measuring Range

0.015 to 0.03%

0.03 to 0.6%

0.6 to 1.2%

Number of Pump Strokes

2

1

1/2

Correction Factor

1/2

1

2

Sampling Time

1 minute per pump stroke

Detecting Limit

0.003% (n = 2)

Color Change

Orange Dark green

Reaction Principle

Gasoline reduces potassium dichromate to form
chromic sulfate, which is dark green in color
CH3(CH2)4CH3+ Cr6+ + H2SO4 Cr3+
Coefficient of Variation 10% (for 0.03 to 0.2 %), 5% (for 0.2 to 0.6 %)
Shelf Life 3 Years
Corrections for
temperature & humidity		 Unnecessary
Store the tubes at cool and dark place.


Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change color by itself

Acetylene

3%

 -

Produce dark green to whole layer

Propane

0.2%

 -

Produce dark green to whole layer

Aromatic HCs

500 ppm

Plus error

Produce dark green

Alcohols, Esters, Ethers

 -

Plus error

Produce dark green

Halogenated HCs.

5000 ppm

Plus error

Produce dark green

Hydrogen sulfide

500 ppm

Plus error

Produce dark green

Sulfur dioxide

500 ppm

Plus error

Produce green


Other substance measurable with this detector tube

Substance

Correction

No. of Pump Strokes

Measuring Range

CycloHexane

Factor: 1.0

1/2, 1 or 2

0.015 to 1.2%

Methylchyclohexane

Factor: 1.4

1

0.04 to 0.84%


Calibration gas generation Static gas dilution method


TLVtoTWA TLVtoSTEL Explosive range
50ppm - 1.1 to 7.5%

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