Phosphine PH3 NO.7
7


Performance

Measuring Range

2.5 to 5 ppm

5 to 50 ppm

50 to 100 ppm

Pump Strokes

4

2

1

Correction Factor

1/2

1

2

Sampling Time

1.5 minutes per pump stroke

Detecting Limit

0.5 ppm (n = 4)

Color Change

White Pale yellow

Reaction Principle

Phosphine reacts with mercuric chloride to produce
mercuric phosphochloride which is pale yellow in color.
Coefficient of Variation 10% (for 5 to 10 ppm), 5% (for 10 to 50 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

Arsine

20 ppm

Plus error

Produces brown stain

Hydrogen selenide

20 ppm

Plus error

Produces brown stain

Hydrogen sulfide

10 ppm

Plus error

Produces dark brown stain


Calibration gas generation High pressure gas cylinder method


TLV-TWA TLV-STEL Explosive range
0.3ppm 1ppm -


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