苯檢測管121 Benzene C6H6    的詳細(xì)介紹 
苯檢測管121 Benzene C6H6
 
Measuring Range
2.5 to 5 ppm
5 to 60 ppm
60 to 120 ppm
Number of Pump Strokes
4
2
1
Correction Factor
1/2
1
2
Sampling Time
1.5 minutes per pump stroke
Detecting Limit
0.5 ppm (n=4)
Color Change
White → Dark Green
Reaction Principle
C6H5  + I2O5→ H2S2O7  + I2
Coefficient of Variation10% (for 5 to 20 ppm), 5% (for 20 to 60 ppm)Shelf Life3 YearsCorrections for  
Possible coexisting substances and their interferences(NOTE) 
 
Substance
Concentration
Interference
Change color by itself
Esters
2000 ppm
Plus error
No discoloration
Aromatic HCs
-Plus error
Produce dark green stain
 
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