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室內空氣甲醛檢測管No.713 FORMALDEHYDE 0.01-0
氯乙烯CH2=CHCl氣體測毒管132SC VINYL CHLORID
氯乙烯CH2=CHCl氣體檢知管132SB VINYL CHLORID
二甲苯C6H4(CH3)2氣體檢測管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+I2O5+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.
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