Arsine ASH3 NO.19LA


Performance

Measuring Range

0.04 to 0.1ppm

0.1 to 1.5ppm

1.5 to 2.4 ppm

2.4 to 10 ppm

Number of Pump Stroke

10

5

3

1

Correction Factor

0.4

1

1.6

6.7

Sampling Time

1.5 minutes per pump stroke

Detecting Limit

0.02 ppm (n=10)

Color Change

Yellow Red

Reaction Formula

Arsine react with mercuric chloride to produce hydrogen chloride.
The indicator of the tube turns to red.
AsH3 + 3HgCl2 As(HgCl)3 + 3HCl
HCl + Basic compound chloride compounds
Coefficient of Variation 10% (for 0.1 to 0.5 ppm), 5% (for 0.5 to 1.5 ppm)
Shelf Life 2 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 chloride -

No effect

No stain by itself

Diborane

 -

No effect

No stain by itself

Phosphine

1/10 time

Plus error

Discolors red stain


Calibration gas generation High pressure gas cylinder method


TLVtoTWA TLVtoSTEL Explosive range
0.05ppm - -

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