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简单介绍：
甲基溴气体检测管157SB
甲基溴气体检测管157SB,甲基溴气体检测管157SB METHYL BROMIDE 20-250ppm,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
详情介绍：
甲基溴气体检测管157SB
甲基溴气体检测管157SB,甲基溴气体检测管157SB METHYL BROMIDE 20-250ppm,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 。
157SB
1. PERFORMANCE
1) Measuring range ：10-500ppm
Number of pump strokes 1(100ml)
2) Sampling time ：2 minutes/1 pump stroke
3) Detectable limit ：1 ppm
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→Reddish orange
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 red Orthoquinone
is produced.
CH3Br＋I2O5＋CrO3＋H2SO4→Br2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
10
30
50
100
150
200
300
400
500
ppm
100ml
GAS To pump
(Brown) (White)
PRETREAT TUBE DETECTOR TUBE
Tube No.
157SA METHYL BROMIDE
Substance ppm Interference ppm Coexistence
Chlorine 1 Similar stain is produced. 1 Higher readings are given.
Bromine 1 〃1 〃
Nitrogen dioxide 1 〃1 〃
Dichloromethane 500 〃500 〃
Chloroform 50 〃50 〃
Ethylene dibromide 50 〃50 〃
Trichloroethylene 50 〃50 〃
Tetrachloroethylene 50 〃50 〃
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 5℃ 10℃ 15℃ 20℃ 30℃ 40℃
(ppm) (32°F) (41°F) (50°F) (59°F) (68°F) (86°F) (104°F)
500 － － － 620 500 430 390
400 － － 630 475 400 360 325
300 － 675 430 345 300 280 260
200 580 320 235 210 200 190 175
150 260 185 160 150 150 140 130
100 120 110 100 100 100 95 90
50 50 50 50 50 50 50 50
185
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
1. PERFORMANCE
1) Measuring range ：10-500ppm
Number of pump strokes 1(100ml)
2) Sampling time ：2 minutes/1 pump stroke
3) Detectable limit ：1 ppm
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→Reddish orange
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 red Orthoquinone
is produced.
CH3Br＋I2O5＋CrO3＋H2SO4→Br2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
10
30
50
100
150
200
300
400
500
ppm
100ml
GAS To pump
(Brown) (White)
PRETREAT TUBE DETECTOR TUBE
Tube No.
157SA METHYL BROMIDE
Substance ppm Interference ppm Coexistence
Chlorine 1 Similar stain is produced. 1 Higher readings are given.
Bromine 1 〃1 〃
Nitrogen dioxide 1 〃1 〃
Dichloromethane 500 〃500 〃
Chloroform 50 〃50 〃
Ethylene dibromide 50 〃50 〃
Trichloroethylene 50 〃50 〃
Tetrachloroethylene 50 〃50 〃
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 5℃ 10℃ 15℃ 20℃ 30℃ 40℃
(ppm) (32°F) (41°F) (50°F) (59°F) (68°F) (86°F) (104°F)
500 － － － 620 500 430 390
400 － － 630 475 400 360 325
300 － 675 430 345 300 280 260
200 580 320 235 210 200 190 175
150 260 185 160 150 150 140 130
100 120 110 100 100 100 95 90
50 50 50 50 50 50 50 50
185
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