Trichloroethylene Cl2C:CHCl NO.132LL


Performance

Measuring Range

0.125 to 0.25ppm

0.25 to 4.0ppm

4.0 to 8.8ppm

Number of Pump Strokes

2

1

1/2

Correction Factor

1/2

1

2.2

Sampling Time

1.5 minutes per pump stroke

Detecting Limit

0.05 ppm (n=2)

Color Change

Yellow Purple

Reaction Principle

Trichloroethylene is decomposed by nascent oxygen by oxidizing agent
to liberate hydrogen chloride which discolors indicator to reddish purple.
Cl2C:CHCl + PbO2 + H2SO4 HCl
HCl + Basic Compound Chloride
Coefficient of Variation 10% (for 0.25 to 1 ppm), 5% (for 1 to 4 ppm)
Shelf Life 2 Years
Corrections for
temperature & humidity		 Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10oC (50oF) or below.


Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change color by itself

Hydrogen chloride, Chlorine,
Bromine

1/2 time

Plus error

Produce purple stain

Tetrachloroethylene

1/2 time

Plus error

Produce purple stain

1,1,1-Trichloroethane

80 ppm or less

No effect

No discoloration up to 80 ppm

Toluene, Xylene

 -

No effect

No discoloration


Other substance measurable with this detector tube

Substance

Correction Factor

Pump Strokes

Measuring Range

1,2-Dichloroethylene

1.5

1

0.4 to 6 ppm


Calibration gas generation Diffusion tube method


TLV-TWA TLV-STEL Explosive range
50ppm 100ppm -

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