Methyl ethyl ketone CH3COC2H5 NO.152
152


Performance

Measuring Range

0.02 to 0.6%

Number of Pump Strokes

2

Correction Factor

1

Sampling Time

2 minutes per pump stroke

Detecting Limit

0.002% (n=2)

Color Change

Orange Dark green

Reaction Principle

Methyl ethyl ketone reacts with potassium dichlomate to
form chromic sulfate, which produces a green color.
CH3COC2H5 + Cr6+ + H2SO4 + H2O Cr3+
Coefficient of Variation 10% (for 0.02 to 0.2 %), 5% (for 0.2 to 0.6 %)
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

Sulfur dioxide

500 ppm

Plus error

Produce green stain

Hydrogen sulfide

500 ppm

Plus error

Produce dark green

Alcohols, Esters, Ketones

 -

Plus error

Produce dark green

Propane

2000 ppm

Yes

Produce dark green for whole layer
2000 ppm()

Aromatic HCs.

500 ppm

Plus error

Produce dark green


Calibration gas generation Static gas dilution method


TLV-TWA TLV-STEL Explosive range
200ppm 300ppm 1.7 to 11.4%


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