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Gastec 211LL Ion Sulphide S2- detector tube (0.5 ~ 20 ppm)

Indicator: 0.5 ~ 20 ppm
Measuring Range: 0.5 ~ 20 ppm
Sampling Time:  3 minute
Colour Change: White → Brown
Reaction Principle: S2- + Pb(CH3COO)2 → PbS 
Nr. of tests: 10

Details

Catalog

Performance
Measuring Range 0.5 to 20 ppm
Sampling Time 3 minutes
Detecting Limit 0.2 ppm
Colour Change White → Brown
Reaction Principle S2- + Pb(CH3COO)2 → PbS
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 colour by itself to
SO32- 20 ppm No No ( 1%)
Cl- 100 ppm No No ( 5%)
Cr6+ ≧ 0.2 ppm Yellow ( ≧ 1ppm)
CO32- 500 ppm No No ( 1%)
S2O32- 20 ppm No No ( 1%)
I- 200 ppm No Yellow ( ≧ 3000ppm)
SO42- 100 ppm No No( 1%)
PO43- 100 ppm No No ( 1%)
Detector tubes for dissolved substances
(i.e. in solution).
Dissolved sulphide detector tube
211H / 211M / 211 / 211LL
Liquid detector tube
 
Ozone: 218
Chloride ion: 221L / 221LL
Mercury: 271
Hexavalent chromium: 273
Bivalent iron: 281
Copper: 284
Zinc: 285
Nicke: 291
To measure, simply immerse the detector tube in a sample of liquid (placed in a beaker or other container). Anyone can measure concentrations quickly, easily and accurately on site.

* Adjustment for pH is required when measuring with liquid detector tubes.
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