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環(huán)氧乙烷CH2CH2O氣體檢知管122SC ETHYLENE OXIDE 1-15ppm,負壓式采樣器設計的特點(diǎn)是可免去正壓方式在推入時(shí)須掌握時(shí)間的麻煩和人工操作產(chǎn)生的人為誤差,測量精度可以有較大提高。設有切割孔和膠嘴,省去砂輪片切割和加接膠管的煩瑣。采樣器一次導氣量總容積100ml,1/2檔位50ml。
更新時(shí)間:2024-07-14
在線(xiàn)留言環(huán)氧乙烷CH2CH2O氣體檢知管122SC ETHYLENE OXIDE 1-15ppm
Tube 22SC
1. PERFORMANCE
1) Measuring range :1-15 ppm
Number of pump strokes :3(300ml)
2) Sampling time :4.5 minutes/3 pump strokes
3) Detectable limit :0.5 ppm
4) Shelf life :3 years
5) Operating temperature :10~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 3 pump strokes
8) Colour change :Pale 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+H2
HCHO+HIO4+H2SO4→HCOOH+HIO3
HCOOH+NaOH→Na(HCOO)+O2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
????
GAS ???? To pump
DETECTOR TUBE
(White)
PRETREAT TUBE
15
10
5
1
ppm
300
ml
122SC ETHYLENE OXIDE
Substance Interference Coexistence
Aldehydes FIG.2 Similar stain is produced. Higher readings are given.
Sulphur dioxide Pale yellow stain is produced. 〃
Hydrogen sulphide FIG.1 〃〃
0
20
10
Hydrogen sulphide〔ppm〕?
FIG.1 Influence of Hydrogen sulphide
Ethylene oxide indicating value 〔ppm〕
1 2
Coexistence
Interference
0
20
10
Formaldehyde〔ppm〕?
FIG.2 Influence of Formaldehyde
Ethylene oxide indicating value 〔ppm〕
10 20
Coexistence
Interference
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 10℃ 15-25℃ 30℃ 40℃
(ppm) (50°F) (59°F) (86°F) (77°F)
15 19 15 13 10
10 12.5 10 8.5 7
5 6 5 4 3.5
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