甲苯C6H5CH3氣體測(cè)毒管124SB TOLUENE 2-100ppm 返回列表頁(yè)

甲苯C6H5CH3氣體測(cè)毒管124SB TOLUENE 2-100ppm

1. PERFORMANCE
1） Measuring range ：2-100 ppm
Number of pump strokes 1（100ml）
2） Sampling time ：1.5 minutes/1 pump stroke
3） Detectable limit ：1 ppm
4） Shelf life ：3 years
5） Operating temperature ：0～40℃
6） Temperature compensation ：Necessary（0～10℃）（See "TEMPERATURE CORRECTION TABLE"）
7） Reading ：Direct reading from the scale calibrated by 1 pump stroke
8） Colour change ：White→Brown
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％
3. CHEMICAL REACTION
Iodine pentoxide is reduced.
C6H5CH3＋I(xiàn)2O5＋H2SO4→I2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
ppm
100
80
60
40
30
20
10
5
2
GAS To pump
Tube No.
124SB TOLUENE
0
100
50
Xylene〔ppm〕?
FIG.1 Influence of Xylene
Toluene indicating value 〔ppm〕
50 100
Interference
0
100
50
Ethyl benzene〔ppm〕?
FIG.2 Influence of Ethyl benzene
Toluene indicating value 〔ppm〕
50 100
Interference
Substance Interference Coexistence
Aromatic hydrocarbons FIG.1,FIG.2 Similar stain is produced. Higher readings are given.
Double-layer stain is produced. If
Hexane the brown stain is clear, the readings
can be obtained by it.
TEMPERATURE CORRECTION TABLE
Scale True Concentration （ppm）
Readings 0℃ 5℃ 15-40℃
（ppm） （32°F） （80°F） （95-104°F）
100 150 125 100
80 120 100 80
60 85 75 60
40 55 45 40
30 40 35 30
20 28 23 20
10 13 10 10
5 6 5 5
2 2 2 2