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                      首頁(yè)>產(chǎn)品中心>日本光明北川式氣體檢測(cè)管>氣體快速檢測(cè)管>157SB溴代甲烷CH3Br氣體檢測(cè)管157SB METHYL BROMIDE 0.4-80ppm

                      溴代甲烷CH3Br氣體檢測(cè)管157SB METHYL BROMIDE 0.4-80ppm

                      簡(jiǎn)要描述:

                      溴代甲烷CH3Br氣體檢測(cè)管157SB METHYL BROMIDE 0.4-80ppm 溴甲烷CH3Br 英文名稱 bromomethane;methyl bromide 又稱溴代甲烷或甲基溴,甲基溴,又稱溴代甲烷或甲基溴,, 溴甲烷CH3Br 英文名稱 bromomethane;methyl bromide

                      更新時(shí)間:2024-12-26

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                      溴代甲烷CH3Br氣體檢測(cè)管157SB METHYL BROMIDE 0.4-80ppm

                      溴代甲烷CH3Br氣體檢測(cè)管157SB METHYL BROMIDE 0.4-80ppm

                      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+I(xiàn)2O5+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

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