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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>119U甲醇CH3OH气体检测管119U METHYLALCOHOL(METHANOL)20-1000ppm

甲醇CH3OH气体检测管119U METHYLALCOHOL(METHANOL)20-1000ppm

简要描述:

甲醇CH3OH气体检测管119U METHYL ALCOHOL(METHANOL) 20-1000ppm,甲醇是一种无色、透明、易燃、易挥发的有毒液体,常温下对金属无腐蚀性(铅、铝除外),略有酒精气味。分子量32.04,相对密度0.792(20/4℃),熔点-97.8℃,沸点64.5℃,闪点12.22℃,自燃点463.89℃,蒸气密度 1.11,蒸气压 13.33KPa(100mmHg 21.2℃),蒸气与空气混合物爆炸极限 6~36.5 %(体积比) ,能与水、乙醇、乙醚、苯、酮、卤代烃

更新时间:2017-08-17

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甲醇CH3OH气体检测管119U METHYLALCOHOL(METHANOL)20-1000ppm

甲醇CH3OH气体检测管119U METHYL ALCOHOL(METHANOL) 20-1000ppm

Tube No.119U

1. PERFORMANCE
1) Measuring range :20-1,000 ppm
Number of pump strokes 1(100ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :5 ppm
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Temperature compensation :Necessary(0~20℃)(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 1 pump stroke
8) Colour change :Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low:15% RSD-mid.:10% RSD-high:10%
3. CHEMICAL REACTION
Potassium dichromate is reduced
CH3OH+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
20
50
100
200
400
600
800
1000
ppm
GAS To pump
DEHUMIDIFIER
(White)
119U
METHYL ALCOHOL
(METHANOL)
Substance Interference Coexistence
Alcohols FIG.1 Similar stain is produced. Higher readings are given.
Esters FIG.2 〃
Paraffin (morefi nth haynd Cro3c)arbons Whole reagent is changed to Brown. 〃
Aromatic hydrocarbons 〃〃
Ketones 〃〃
Halogenated hydrocarbons 〃〃
0
500
1000
Ethanol〔ppm〕�
FIG.1 Influence of Ethanol
Methanol indicating value 〔ppm〕
500
Coexistence
Interference
0
500
1000
Ethyl acetate〔ppm〕�
FIG.2 Influence of Ethyl acetate
Methanol indicating value 〔ppm〕
500
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 10℃ 20-40℃
(ppm) (32°F) (50°F) (68-104°F)
1000 1200 1100 1000
800 960 880 800
600 600 660 600
400 480 440 400
200 240 220 200
100 120 110 100
50 60 50 50
20 24 20 20

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