醋酸乙烯酯CH3CO2CH=CH2气体检测管237S VINYL ACETATE 5-120ppm 返回列表页

醋酸乙烯酯CH3CO2CH=CH2气体检测管237S VINYL ACETATE 5-120ppm

Tube No.237S

1. PERFORMANCE
1） Measuring range ：10-120 ppm 5-60 ppm
Number of pump strokes 1（100ml） 2（200ml）
2） Sampling time ：1.5 minutes/1 pump stroke
3） Detectable limit ：1 ppm（200ml）
4） Shelf life ：2 years
5） Operating temperature ：0～40℃
6） Reading ：Direct reading from the scale calibrated by 1 pump stroke
7） Colour change ：Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3CO2CH＝CH2＋Cr6＋＋H2SO4→Cr3＋
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
100
ml
ppm
GAS To pump
DEHUMIDIFIER
（White）
120
100
80
60
40
20
10
237S VINYL ACETATE
Substance Interference ppm Coexistence
Acetic acid The accuracy of readings is not
affected.
Ethylene 150 The top of discoloured layer becomes
unclear.
Alcohols Similar stain is produced. Higher readings are given.
Ethers 〃〃
A（mlipohrea ttihca hny Cdr3o）carbons tWo hBorloew lany. er is discoloured 〃
Aromatic hydrocarbons 〃〃
Halogenated hydrocarbons 〃〃
Esters 〃〃
Ketones 〃〃
（NOTE）
In case of 2 pump strokes, following formula is available for the actual concentration.
Actual concentration＝1/2×Reading value