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Methanol (CH3OH)
Item Item Details
(Price is for domestic US market only)
Methanol (CH3OH)
Item Name:
Methanol (CH3OH)
Item #:
GAS-111LL

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Methanol CH3OH NO.111LL

111LL


Performance

Measuring Range

2 to 20ppm

20 to 56ppm

Number of Pump Strokes

4

2

Correction Factor

1

2.8

Sampling Time

2 minutes per pump stroke

Detecting Limit

0.2 ppm (n=4)

Color Change

Pale yellow Pale bluish green

Reaction Principle

Methyl alcohol is reduced by cromic acid to produce pale bluish green color.
CH3OH + Cr6+ + H2SO4 Cr3+

Coefficient of Variation

15% (for 2 to 5 ppm), 10% (for 5 to 20 ppm)

Shelf Life 2 Years
Corrections for
temperature & humidity
Temperature correction is necessary
Store the tubes at cool and dark place.


Possible coexisting substances and their interferences

Substance

Concentration

Interference

Change color by itself

Alcohols

-

Plus error

Produce similar stain by themselves

Aromatic hydrocarbons - Plus error Produce similar stain by themselves

Calibration gas generation Diffusion tube method


TLV-TWA TLV-STEL Explosive range
200ppm 250ppm 6 to 36%


 

 
Range 2-56


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