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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>111U1,2,4-三甲基苯C6H3(CH3)3气体检测管111U 20-250ppm

1,2,4-三甲基苯C6H3(CH3)3气体检测管111U 20-250ppm

简要描述:

1,2,4-三甲基苯C6H3(CH3)3气体检测管111U 1,2,4-TRIMETHYL BENZENE 20-250ppm,中文名称2: 假枯烯,英文名称2: pseudocumene,健康危害: 本品对眼、呼吸道有刺激作用;对中枢神经系统有抑制作用。

更新时间:2017-07-25

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1,2,4-三甲基苯C6H3(CH3)3气体检测管111U 20-250ppm

1,2,4-三甲基苯C6H3(CH3)3气体检测管111U 1,2,4-TRIMETHYL BENZENE 20-250ppm

Tube No.111U
1. PERFORMANCE
1) Measuring range :10-250 ppm
Number of pump strokes 1(100ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :1 ppm
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Reading :Graduations printed on the tube are calibrated by Ethyl acetate at 1 pump stroke
and 1,2,4-trimethyl benzene is determined by using a conversion chart.
7) Colour change :Yellow→Dark brown
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
Chromium oxide is reduced.
C6H3(CH3)3+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
DEHUMIDIFIER
(White)
250
200
150
100
50
30
10
ppm
111U C 1,2,4-TRIMETHYL BENZENE
Substance Interference Coexistence
Alcohols Brown stain is produced. Higher readings are given.
Esters 〃〃
Ketones 〃〃
Aromatic hydrocarbons 〃〃
Aliphatic hydrocarbons Double-layer stain is produced. If the
(more than C3) dcaanrk b ber oowbnta sintaeidn bisy citl.ear, the readings
Halogenated hydrocarbons 〃
No. 111U Tube reading(ppm)�
(100ml)�
Trimethyl benzene(ppm)�
1000
800
600
400
200
100
50
20
20
150
200
50
100
25

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