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首页>产品中心>日本光明北川式气体检测管>气体快速检测管>122SC环氧乙烷CH2CH2O气体检知管122SC ETHYLENE OXIDE 1-15ppm

环氧乙烷CH2CH2O气体检知管122SC ETHYLENE OXIDE 1-15ppm

简要描述:

环氧乙烷CH2CH2O气体检知管122SC ETHYLENE OXIDE 1-15ppm,负压式采样器设计的特点是可免去正压方式在推入时须掌握时间的麻烦和人工操作产生的人为误差,测量精度可以有较大提高。设有切割孔和胶嘴,省去砂轮片切割和加接胶管的烦琐。采样器一次导气量总容积100ml,1/2档位50ml。

更新时间:2017-09-11

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环氧乙烷CH2CH2O气体检知管122SC ETHYLENE OXIDE 1-15ppm

环氧乙烷CH2CH2O气体检知管122SC ETHYLENE OXIDE 1-15ppm

Tube No.122SC

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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