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Hydrogen  sulfide (H2S)
Item Item Details
(Price is for domestic US market only)
Hydrogen  sulfide (H2S)
Item Name:
Hydrogen sulfide (H2S)
Item #:
GAS-4L

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Hydrogen sulfide H2S NO.4L

4L


Performance

Measuring Range

1 to10 ppm

10 to 120 ppm

120 to 240 ppm

Number of Pump Strokes

10 to 2

1

1/2

Correction Factor

1/10 to 1/2

1

2

Sampling Time

30 seconds per pump stroke

Detecting Limit

0.2 ppm (n=10)

Color Change

White Brown

Reaction Principle

Hydrogen sulfide reacts with lead acetate to
form lead sulfide, which color is brown.

Coefficient of Variation 5% (for 10 to 120 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

Nitrogen dioxide

1/4 time

Minus erorr

No discoloration

Sulfur dioxide

1 time

Plus error

No discoloration

Mercaptans

-

No effect

No discoloration

Hydrogen chloride

-

Bleaching

No discoloration


Calibration gas generation Permeation tube method


TLV-TWA TLV-STEL Explosive range
10ppm 15ppm 4.0 to 44%

 
Range 1-240


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