Gasoline CnHm NO.101L


Performance

Measuring Range

30 to 1000 ppm

1000 to 2000 ppm

Number of Pump Strokes

2

1

Correction Factor

1

2

Sampling Time

2 minutes per pump stroke

Detecting Limit

5 ppm (n=2)

Color Change

Brownish yellow Dark green

Reaction Principle

Propylene reduces potassium dichromate to form
chromic sulfate, which is dark green in color
CnHm + K2Cr2O7 + H2SO4 Cr2(SO4)3
Coefficient of Variation

10% (for 30 to 300 ppm), 5% (for 300 to 1000 ppm)
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
Hydrogen sulfide -

Plus error

Dark brown

Acetylene

 -

Plus error

Dark brown
Aromatic HCs - Plus error Dark green
Esters, Ethers,Alcohols - Plus error Dark green
Sulfur dioxide - Plus error Dark green
Organic solvents (C3) - Plus error Dark green


Other substance measurable with this detector tube

Substance

Correction

No. of Pump Strokes

Measuring Range

Allyl chloride

Factor: 34

1/2

0.1 to 3.4%

Heptane

Factor: 1.0

1 or 2

30 to 2000 ppm

Isobutene

Factor: 22

1

0.07 to 2.2%


Calibration gas generation Static gas dilution method


TLV-TWA TLV-STEL Explosive range
300ppm 500ppm 1.4 to 7.6%


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