Phosphine PH3 NO.7J
7J


Performance

Measuring Range

2.5 to 25 ppm

25 to 500 ppm

500 to 1000 ppm

Pump Strokes

2 to 10

1

1/2

Correction Factor

1/2 to 1/10

1

2

Sampling Time

1 minute per pump stroke

Detecting Limit

1 ppm (n = 10)

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 2.5 to 100 ppm), 5% (for 100 to 500 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

1/3 time

Plus error

Produces brown stain

Hydrogen selenide

1/5 time

Plus error

Produces brown stain

Hydrogen sulfide

1/5 time

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.