汽油檢測管101 CnHm Gasoline 的詳細介紹
 汽油檢測管101 CnHm Gasoline Gasoline                 No.101 CnHm
Performance
 
Measuring Range
0.015 to 0.03%
0.03 to 0.6%
0.6 to 1.2%
Number of Pump Strokes
2
1
1/2
Correction Factor
1/2
1
2
Sampling Time
1 minute per pump stroke
Detecting Limit
0.003% (n = 2)
Color Change
Orange → Dark green
Reaction Principle
CnHm + Cr6++ H2SO4 → Cr3+
Coefficient of Variation 10% (for 0.03 to 0.1 %), 5% (for 0.1 to 0.6 %)
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 color by itself
Acetylene
3%
Yes
Produce dark brown to whole layer
Propane
0.2%
Yes
Produce dark brown to whole layer
(2%)
Aromatic HCs
500 ppm
Plus error
Produce dark green
(5000ppm)
Alcohols, Esters, Ethers
-
Plus error
Produce dark green
Halogenated HCs.
5000 ppm
Plus error
Produce dark green
(5000ppm)
Hydrogen sulfide
500 ppm
Plus error
Produce dark green
(5000ppm)
Sulfur dioxide
500 ppm
Plus error
Produce green
(5000ppm)