氮氧化物檢測管11L Nitrogen oxides 的詳細介紹
 氮氧化物檢測管11L  Nitrogen oxides
Nitrogen oxides       No.11LNO+NO2
Performance
 
MeasuringRange
0.04 to 0.08ppm
0.08 to 0.2ppm
0.2 to 5.0 ppm
5.0 to 16.5ppm
Number of Pump Strokes
8
4
2
1
CorrectionFactor
0.2
0.4
1
3.3
SamplingTime
2 minutes per pumpstroke
DetectingLimit
0.01ppm(n=8)
ColorChange
White → Yellowishorange
ReactionPrinciple
NO + Cr6++ H2SO4→NO2
NO2 + o-Tolidine 仺 Yellowish orangeproduct
Coefficient ofVariation 10% (for0.2 to 1 ppm), 5% (for 1 to 5 ppm)
ShelfLife 3Years
Correctionsfor
temperature & humidity Unnecessary
Store the tubes at cool and darkplace.

Possible coexisting substances and theirinterferences (NOTE)


Substance
Concentration
Interference
Change color by itself
Chlorine,Bromine,
Chlorine dioxide
-
Plus error
Produce similarstain
Sulfurdioxide
25 ppm
Minus error
Nodiscoloration
Hydrogensulfide
25 ppm
Minus error
Nodiscoloration