二甲苯C6H4（CH3）2氣體檢測(cè)管143SA XYLENE 5-1000ppm 返回列表頁

二甲苯C6H4（CH3）2氣體檢測(cè)管143SA XYLENE 5-1000ppm

Tube 43SA
1. PERFORMANCE
1） Measuring range ：5-1,000 ppm
Number of pump strokes 2（200ml）
2） Sampling time ：4 minutes/2 pump strokes
3） Detectable limit ：2 ppm
4） Shelf life ：1.5 years
5） Operating temperature ：0～40℃
6） Reading ：Direct reading from the scale calibrated by 2 pump strokes
7） Colour change ：White→Brown
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：10％　RSD-high：10％
3. CHEMICAL REACTION
Iodine pentoxide is reduced.
C6H4（CH3）2＋I(xiàn)2O5＋H2SO4→I2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
800
400
600
1000
200
100
50
25
10
5
ppm
143SA XYLENE
Substance Interference ppm Coexistence
Benzene Similar stain is produced. 5 Higher readings are given.
Toluene 〃5 〃
Methyl alcohol Tafhfeec atecdc.uracy of readings is not 1％ 〃
Hexane Pale brown stain is produced. 0.1％ The top of discoloured layer becomes
unclear and higher readings are given.