甲苯C6H5CH3气体检测管124SA TOLUENE 10-500ppm 返回列表页

甲苯C6H5CH3气体检测管124SA TOLUENE 10-500ppm

1. PERFORMANCE
1） Measuring range ：10-500 ppm
Number of pump strokes 1（100ml）
2） Sampling time ：2 minutes/1 pump stroke
3） Detectable limit ：2 ppm
4） Shelf life ：3 years
5） Operating temperature ：0～40℃
6） Reading ：Direct reading from the scale calibrated by 1 pump stroke
7） Colour change ：White→Brown
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：10％　RSD-high：5％
3. CHEMICAL REACTION
Iodine pentoxide is reduced.
C6H5CH3＋I2O5＋H2SO4→I2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
500
400
300
200
100
50
25
10
GAS To pump
Tube No.
124SA TOLUENE
Substance ppm Interference ppm Coexistence
The top of discoloured layer
Benzene Brownish green stain is produced. 10 becomes unclear and higher
readings are given.
Xylene FIG.1 5 Similar stain is produced. 20 Higher readings are given.
Ethyl benzene FIG.2 5 〃10 〃
Hexane 0.1％ Whole layer is discoloured to 0.1％ Pale brown. 〃
Methyl alcohol Tafhfeec atecdc.uracy of readings is not 1％ 〃
Coexistence
Interference
0
600
400
200
Xylene〔ppm〕�
FIG.1 Influence of Xylene
Toluene indicating value 〔ppm〕
200 400 600
Coexistence
Interference
0
600
400
200
Ethyl benzene〔ppm〕�
FIG.2 Influence of Ethyl benzene
Toluene indicating value 〔ppm〕
100 200 300