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     话:  13861515733
    联系人: 朱国栋

      址: 宜兴市徐舍镇鲸塘工业园鲸龙路8号
      址: www.yxbohua.com

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    气相色谱仪

          气相色谱仪是一种色谱分析仪器。由载气带入,通过对欲检测混合物中组分有不同留存机能的气相色谱仪色谱柱,使各组分分离,依次导入检测器,以得到各组分的检测信号。按照导入检测器的先后次序,经由对比,可以区别出是什么组分,根据峰高度或峰面积可以计算出各组分含量。通常采用的检测器有:热导检测器,火焰离子化检测器,氦离子化检测器,光离子化检测器,声测管批发,电子捕捉检测器,火焰光度检测器,电化学检测器,桥梁声测管,质谱检测器等。

          (1)环境前提:对环境温度要求并不苛刻,一般在5~35℃的室温前提下即可正常操纵。但声测管对于环境湿度一般要求在20%~85%为宜。在高度湿润的地区,使用某些型号仪器的氢火焰离子化检测器时,会因湿度大而导致放大器绝缘机能下降,若在高敏捷度挡上操纵,响应值会下降。分析职员在使用仪器时,若碰到上述现象,应采取必要的措施。

          (2)气体纯度:所用气源纯度要求在99.99%以上。目前,很多操纵者对于不同检测器要求不同气源纯度的题目没有引起足够的正视,使用中,有可能因气源纯度不够而导致检测器检测限高且基线不不乱。例如用纯度为98%的氢气作为氢火焰离子化声测管的燃气气源,在检测器的104MΩ敏捷度挡上使用时,可能因为氢气纯度不够(含有甲烷等可燃性气体),导致基线严峻不稳,似乎有永远出不完的峰。假如载气纯度不高,义含有微量氧时,将会影响毛细管柱的寿命。

          (3)气流比例的选择:对下氢火焰离子化检测器,需要N2-H2-Air焰,点燃后应为富氧焰,即空气应过量,以保证氢气完全燃烧,3种气体的最佳比例为N2:H2=1:(0.85~1),Air:H2=(6~8):1或空气量更大。

          我公司专业生产销售声测管 本文由www.yxbohua.com提供

    A chromatographic analysis instrument. By the carrier to, through the test mixture components have different retention function of the gas chromatograph column, the separation of components, in order to import the detector, in order to get all the components of the signal. According to the sequence of import detector, by contrast, can be the difference between what is components, according to the peak height or peak area of each component content can be calculated. Usually adopted detector are: thermal conductivity detector, flame ionization detector, helium ionization detector, optical ionization detector, acoustic detecting tube wholesale, electron capture detector, flame photometric detector, electrochemical detector, acoustic detecting pipe bridge, mass spectrometry detector etc.
    Premise: (1) the environment temperature requirements for the environment is not strict, generally in 5 ~ 35 ℃ at room temperature under the premise of normal control. But the general requirements for the environment humidity was 20% ~ 20% advisable. In highly humid areas, use of certain type instrument of hydrogen flame ionization detector, can cause the amplifier because of high humidity insulation function drops, if on the skus in manipulation, response value will decline. Analysis of staff in the use of instruments, if encounter the above phenomenon, necessary measures should be taken.
    (2) gas purity: used in air purity over 99.99%. Now, many operators for different detector for the topic of air purity without enough face, in use, may be caused by air purity is not enough high and no baseline not disorderly detector. For example with a purity of 98% hydrogen as a hydrogen flame ionization detector of gas source, the detector of the 104 m Ω agility on block when using, probably because not enough hydrogen purity (contain combustible gases such as methane), severe instability lead to baseline, there seems to be a forever peak. If the carrier gas purity is not high, the righteous contains trace oxygen, will affect the service life of capillary column.
    Under the proportion of choice: (3) the airflow of the hydrogen flame ionization detector, need N2 - H2 - Air flame, lighting should be rich oxygen flame, after which should be excess Air, to ensure the complete combustion of hydrogen, three kinds of gas in the best ratio of N2: H2 = 1: (0.85 ~ 1), Air: H2 = (6 ~ 8) : 1 or more Air.

     

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