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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CH3CHCH2O气体检测管122SC ETHYLENE OXIDE 3-70ppm

环氧乙烷CH3CHCH2O气体检测管122SC ETHYLENE OXIDE 3-70ppm

简要描述:

环氧乙烷CH3CHCH2O气体检测管122SC ETHYLENE OXIDE 3-70ppm,检测管特点: (1)对大多存在可燃性易爆气体、有毒气体及窒息性气体,放射性物质的放射性都可定量测量 ①操作简便:将检测管插在手动气泵上抽(100ml)定量气体即可。 ②分析速度快:一般仅需几十秒至几分钟即可得知结果,其分析速度是任何化学分析和仪器方法不能比拟的。 ③测量精度高:该方法准确度误差一般有效量程为7%~15%, ④适应性好:每种检测管都有1种到几种不等的大小范围的选择。

更新时间:2017-08-23

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环氧乙烷CH3CHCH2O气体检测管122SC ETHYLENE OXIDE 3-70ppm

环氧乙烷CH3CHCH2O气体检测管122SC ETHYLENE OXIDE 3-70ppm

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
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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
1 1 1 1 1

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