乙烯H2C=CH2氣體檢測(cè)管108B Ethylene 0.01-100ppm

Tube 08B
1. PERFORMANCE
1） Measuring range ：0.5-100 ppm 0.1-20 ppm
Number of pump strokes 1（100ml） 5（500ml）
2） Sampling time ：2 minutes/1 pump stroke
3） Detectable limit ：0.01 ppm（500ml）
4） Shelf life ：3 years
5） Operating temperature ：0～40℃
6） Reading ：Colour intensity method
7） Colour change ：Pale yellow→Blue
2. RELATIVE STANDARD DEVIATION
RSD-low：　　RSD-mid.：　　RSD-high：
3. CHEMICAL REACTION
Molybdate is reduced and molybdeum blue is produced.
H2C＝CH2＋PdSO4＋（NH4）2MoO4→Mo3O8
4. CALIBRATION OF THE TUBE
STANDARD GAS CYLINDER METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
GAS
REAGENT
First section Second section
（Pale yellow）
REAGENT
（Pale yellow）
To pump
108B ETHYLENE
Substance Interference ppm Coexistence
Whole reagent is discoloured to
Hydrogen（over 40℃） Similar stain is produced. 10% Blue and higher readings are
given.
Saturated hydrocarbons 〃Higher readings are given.
Acetylene Dark blue stain is produced. 〃
Carbon monoxide Green or Blue stain is produced. 〃
Hydrogen sulphide Black stain is produced. 1,000 〃
Hydrogen cyanide Original colour is faded to White. 〃
Benzene Yellowish orange or Yellowish
brown stain is produced.
Carbon disulphide 〃
Chlorine 〃
Nitrogen dioxide 〃1
Ammonia Original colour is faded. Lower readings are given.