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環(huán)氧乙烷CH2CH2O氣體檢知管122SC ETHYLENE OXIDE 1-15ppm,負(fù)壓式采樣器設(shè)計的特點是可免去正壓方式在推入時須掌握時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(shè)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(dǎo)氣量總?cè)莘e100ml,1/2檔位50ml。
更新時間:2024-12-18
在線留言環(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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下一篇:122SD環(huán)氧乙烷CH2CH2O檢氣管122SD ETHYLENE OXIDE 0.1-14ppm
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