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                    1. 韩国三级大全久久网站_色噜噜一区二区三区_高清欧美性猛交xxxx黑人猛_激情五月开心婷婷_来一水AV@lysav

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                      首頁>產(chǎn)品中心>日本光明北川式氣體檢測管>氣體快速檢測管>190U1,1,2,2-四溴乙烷CHBr2CHBr2氣體檢測管190U 4-100ppm

                      1,1,2,2-四溴乙烷CHBr2CHBr2氣體檢測管190U 4-100ppm

                      簡要描述:

                      1,1,2,2-四溴乙烷CHBr2CHBr2氣體檢測管,1,1,2,2-Tetrabromoethane 4-100ppm,別名:四溴化乙炔,英文名稱 1,1,2,2-Tetrabromoethane;Acetylene tetrabromide,分子式 C2H2Br4;Br2HCCHBr2,健康危害:對(duì)中樞神經(jīng)系統(tǒng)有抑制作用,對(duì)呼吸道有刺激作用,可引起肝、腎損害及單核細(xì)胞增多,可引起皮炎。

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

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                      1,1,2,2-四溴乙烷CHBr2CHBr2氣體檢測管190U 4-100ppm

                      1,1,2,2-四溴乙烷CHBr2CHBr2氣體檢測管190U 4-100ppm

                      Tube 90U
                      0
                      30
                      40
                      50
                      20
                      10
                      Ethanol〔ppm〕?
                      FIG.1 Influence of Ethanol
                      Ethyl cellosolve indicating value 〔ppm〕
                      100 200 300 400 500
                      (300ml)? (100ml)?
                      0
                      300
                      400
                      500
                      200
                      100
                      1,1,1-Trichloroethane〔ppm〕?
                      FIG.2 Influence of 1,1,1-Trichloroethane
                      Ethyl cellosolve indicating value 〔ppm〕
                      100 200 300 400 500 600
                      (300ml)?
                      1. PERFORMANCE
                      1) Measuring range :5-500 ppm
                      Number of pump strokes 3(300ml)
                      2) Sampling time :4.5 minutes/3 pump strokes
                      3) Detectable limit :2 ppm
                      4) Shelf life :2 years
                      5) Operating temperature :10~35℃
                      6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
                      7) Reading :Direct reading from the scale calibrated by 3 pump strokes
                      8) Colour change :Yellow→Pale blue
                      2. RELATIVE STANDARD DEVIATION
                      RSD-low:10% RSD-mid.:10% RSD-high:10%
                      3. CHEMICAL REACTION
                      Chromium oxide is reduced.
                      C2H5OCH2CH2OH+Cr6++H2SO4→Cr3+
                      4. CALIBRATION OF THE TUBE
                      GAS CHROMATOGRAPHY
                      5. INTERFERENCE AND CROSS SENSITIVITY
                      GAS To pump
                      500
                      400
                      500
                      200
                      150
                      100
                      50
                      20
                      5
                      300ml
                      ppm
                      (White)
                      DEHUMIDIFIER
                      ?? ?? ??
                      ????
                      190U ETHYL CELLOSOLVE
                      Substance Interference Coexistence
                      Alcohols FIG.1 Similar stain is produced. Higher readings are given.
                      Ethers 〃〃
                      (Pmaroarfefi nth haynd Cro3c)arbons Whole reagent is changed to Brown. 〃
                      Aromatic hydrocarbons 〃〃
                      Esters 〃〃
                      Ketones 〃〃
                      Halogenated hydrocarbons FIG.2 〃〃
                      TEMPERATURE CORRECTION TABLE
                      Scale True Concentration (ppm)
                      Readings 10℃ 15℃ 20℃ 25℃ 30℃ 35℃
                      (ppm) (50°F) (59°F) (68°F) (77°F) (80°F) (95°F)
                      500 800 620 500 410 335 265
                      400 620 490 400 325 260 200
                      300 450 365 300 245 195 145
                      200 290 245 200 160 125 95
                      150 215 185 150 120 90 70
                      100 145 125 100 80 60 45
                      50 75 65 50 40 30 25
                      20 30 25 20 15 12 10
                      5 10 7 5 4 3 2

                      韩国三级大全久久网站_色噜噜一区二区三区_高清欧美性猛交xxxx黑人猛_激情五月开心婷婷_来一水AV@lysav
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