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简单介绍：
日本光明理化溴代甲烷CH3Br气体检测管157SB
日本光明理化溴代甲烷CH3Br气体检测管157SB ，溴代甲烷CH3Br气体检测管157SB METHYL BROMIDE 0.4-80ppm
详情介绍：
日本光明理化溴代甲烷CH3Br气体检测管157SB
日本光明理化溴代甲烷CH3Br气体检测管157SB ，溴代甲烷CH3Br气体检测管157SB METHYL BROMIDE 0.4-80ppm，日本光明理化工业株式会社从1947年开始，在气体分析领域开拓了六十余年 , 形成了驰名于世的 ” 北川 ” 式气体检测管。气体快速分析法 ” 北川 ” 的历史就是日本检测管的历史 。目前是世界上*大的检测管生产厂家，也是日本**家通过美国SEI的认证，欧盟的认证的检测管厂家。公司不仅有ISO9001:2000的认证，还获得了环境管理的ISO14001的认证。北川式手动气体采集器AP-20 备有采气完成指示计 , 可以清楚的判明采气是否完成 . • 有专门截留玻璃的截留槽 , 以防止检测管割尖时玻璃片飞溅 . • 有采气容积为 50 毫升和 100 毫升的两段式制动卡 . • 采气器极为小巧 , 并有便于携带的皮具包 。
1. PERFORMANCE
1) Measuring range ：5-80 ppm 2.5-40 ppm 0.9-7.3 ppm
Number of pump strokes 1(100ml) 2(200ml) 4(400ml)
2) Sampling time ：1.5 minutes/1 pump stroke
3) Detectable limit ：1 ppm(200ml)
4) Shelf life ：3 years(Necessary to store in a refrigerated place ; 0～10℃)
5) Operating temperature ：0～40℃
6) Temperature compensation ：Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading ：Direct reading from the scale calibrated by 1 pump stroke
8) Colour change ：White→Yellow
2. RELATIVE STANDARD DEVIATION
RSD-low：15％ RSD-mid.：10％ RSD-high：10％
3. CHEMICAL REACTION
By decomposing with an Oxidizer, Bromine is produced. Bromine reacts with o-Toluidine and yellow
Orthoquinone is produced.
CH3Br＋I2O5＋CrO3＋H2SO4→Br2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
5
10
15
20
30
40
60
80
ppm
100ml
GAS To pump
(Olive) (White)
PRETREAT TUBE DETECTOR TUBE
Tube No.
157SB METHYL BROMIDE
(NOTE)
When the concentration is below 5 ppm, 2 pump strokes can be used to determine the lower concentration.
Following formula is available for the actual concentration.
Actual concentration＝1/2×Temperature corrected value
Substance Interference ppm Coexistence
Halogen Similar stain is produced. Higher readings are given.
Halogenated hydrocarbons 〃〃
Hexane FIG.1 200 Lower readings are given.
0
50
60
70
80
30
40
Hexane〔ppm〕?
FIG.1 Influence of Hexane Methyl bromide indicating value 〔
ppm〕
100 200 300 400 500 600 700
20
10
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 5℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (41°F) (50°F) (68°F) (86°F) (104°F)
80 － 140 98 80 75 73
60 145 76 67 60 57 56
40 44 43 42 40 40 40
30 30 30 30 30 30 30
1) Measuring range ：5-80 ppm 2.5-40 ppm 0.9-7.3 ppm
Number of pump strokes 1(100ml) 2(200ml) 4(400ml)
2) Sampling time ：1.5 minutes/1 pump stroke
3) Detectable limit ：1 ppm(200ml)
4) Shelf life ：3 years(Necessary to store in a refrigerated place ; 0～10℃)
5) Operating temperature ：0～40℃
6) Temperature compensation ：Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading ：Direct reading from the scale calibrated by 1 pump stroke
8) Colour change ：White→Yellow
2. RELATIVE STANDARD DEVIATION
RSD-low：15％ RSD-mid.：10％ RSD-high：10％
3. CHEMICAL REACTION
By decomposing with an Oxidizer, Bromine is produced. Bromine reacts with o-Toluidine and yellow
Orthoquinone is produced.
CH3Br＋I2O5＋CrO3＋H2SO4→Br2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
5
10
15
20
30
40
60
80
ppm
100ml
GAS To pump
(Olive) (White)
PRETREAT TUBE DETECTOR TUBE
Tube No.
157SB METHYL BROMIDE
(NOTE)
When the concentration is below 5 ppm, 2 pump strokes can be used to determine the lower concentration.
Following formula is available for the actual concentration.
Actual concentration＝1/2×Temperature corrected value
Substance Interference ppm Coexistence
Halogen Similar stain is produced. Higher readings are given.
Halogenated hydrocarbons 〃〃
Hexane FIG.1 200 Lower readings are given.
0
50
60
70
80
30
40
Hexane〔ppm〕?
FIG.1 Influence of Hexane Methyl bromide indicating value 〔
ppm〕
100 200 300 400 500 600 700
20
10
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 5℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (41°F) (50°F) (68°F) (86°F) (104°F)
80 － 140 98 80 75 73
60 145 76 67 60 57 56
40 44 43 42 40 40 40
30 30 30 30 30 30 30