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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
環氧乙烷CH2CH2O氣體檢測管122SB ETHYLENE OXIDE 5-100ppm
Tube 22SB
1. PERFORMANCE
1) Measuring range :5-100 ppm
Number of pump strokes 2(200ml)
2) Sampling time :3 minutes/2 pump strokes
3) Detectable limit :0.5 ppm(200ml)
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 2 pump strokes
8) Colour change :Pink→Yellow
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
By decomposing with an Oxidizer, Formic acid is produced and PH indicator is discoloured.
CH2CH2O+H2SO4→HOCH2CH2OH
HOCH2CH2OH+HIO4→2HCHO+HIO3+H2O
HCHO+HIO4+H2SO4→HCO2H+HIO3
HCO2H+NaOH→Na(HCOO)+H2O
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
????
GAS To pump
DETECTOR TUBE
(White)
PRETREAT TUBE
100
80
60
40
20
10
5
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????
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122SB ETHYLENE OXIDE
Substance Interference Coexistence
Formaldehyde Similar stain is produced. Higher readings are given.
Propylene 〃〃
Acetone Ytheell ogwas s itnalient ies dpgroed. uced a little on Lower readings are given.
Diethyl ether Plitatlele o onr athneg eg assta ininle its e pdrgoed.uced a 〃
TEMPERATURE CORRECTION TABLE
Scale Corrected Concentration (ppm)
Readings 0℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (50°F) (68°F) (86°F) (104°F)
100 - 125 100 80 70
80 - 100 80 64 56
60 140 75 60 48 42
40 80 50 40 32 28
20 32 25 20 17 14
10 15 12 10 9 7
5 7 6 5 5 4
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