苯检测管121 Benzene C6H6    的详细介绍 

苯检测管121 Benzene C6H6

 

Benzene                                              No.121

 

C6H6

 

 

  Performance 

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 
temperature & humidityUnnecessaryStore the tubes at cool and dark place.
 

 

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