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GAS201L Total Sulphides Gastec Gas Detector Tubes 0.002 to 0.02 mg

GAS201L Total Sulphides Gastec Gas Detector Tubes 0.002 to 0.02 mg

SKU: GAS201L

GAS201L

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Excl. VAT: £29.50 Incl. VAT: £35.40

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Product Description

Details

GAS201L Sulphides Gastec Detector Tubes

1. The measured out mud and soil is put in the generation tube and 5mL of distilled water are added.
In case of muddy water, it suffices to add a small amount of distilled water (measured out in a graduated cylinder) to the gas generation tube.
Put the cap on the generation tube.

2. Both ends of the detector tube (No.201L) are broken off, and one end of the detector tube is connected to the gas generation tube and the other to the gas sampling pump

3. 18N 2 mL of sulphuric acid are added to the gas generation tube

4. Pull the handle of the gas sampling pump to draw in a sample of the generated hydrogen sulphide.
(By repeating this process several times, all sulphides become hydrogen sulphide several times repeatedly).
The scale in the detector tube is read, and the concentration of the sulphide in the sample is calculated.

Performance

Measuring Range	0.002 to 0.02 mg
Sampling Time	45 seconds per pump stroke
Detecting Limit	0.0002 mg (n=1)
Colour Change	White Brown
Reaction Principle	Gus generation tube: Sulphides + H₂SO₄ H₂S Detector tube: H₂S + Pb(CH₃COO)₂ PbS
Coefficient of Variation	5% (for 0.002 to 0.02mg)
Shelf Life	3 Years
Corrections for temperature & humidity	Unnecessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences

Substance	Concentration	Interference	Change colour by itself
Chloride ion	-	No error	No discoloration
Chromate ion	-	No error	No discoloration
Carbonate ion	-	No error	No discoloration