气相色谱法中归一化定量为什么要用校正因子? 由于同一检测器对不同物质的响应值不同,所以当相同质量的不同物质通过检测器时,产生的峰面积(或峰高)不一定相等。为使峰面积能够准确地反映待测组分的含量,就必须先用已知量的待测组分测定在所用色谱条件下的峰面积,以计算定量校正因子。相对校正因子就是当组分i的质量与标准物质s相等时,标准物质的峰面积是组分i峰面积的倍数。若某组分质量为mi,峰面积Ai,则fi与Ai之积代表了质量为mi的标准物质的对应峰面积。也就是说,通过相对校正因子,可以把各个组分的峰面积分别换算成与其质量相等的标准物质的峰面积,于是比较标准就统一了。这就是归一法求算各组分百分含量的基础。扩展资料将所得的色谱信号予以校正,才能与组分的量一致,即需要用下式校正组分的重量:W=f′A式中f′为该组分的定量校正因子。依上式从色谱峰面积(或峰高)可得到相应组分的重量,进一步用下述方法之一计算出组分i在样品中的含量Wi:1、归一化法将组分的色谱峰面积乘以各自的定量校正因子,然后按下式计算此法的优点是方法简便,进样量与载气流速的影响不大;缺点是样品中的组分必须在色谱图中都能给出各自的峰面积,还必须知道各组分的校正因子。2、内标法,向样品中加入被称为。
气相色谱测含量,归一化法是怎样的 跟小学的归一化应用题一样的。归一化法就是 把所有的zhidao峰(面积、或者高)都加起来作为一,其中每一个专峰代表的物质以峰面积或者峰高在这个1 里面的比例作为物质含量的测量方法。因此此法要求,所有的待测物都应该出峰,物质属性比较接近。所以归一化法都是用在测量同类物质的。比如石油里的烃属类
求气相色谱分析法几个常用术语的英语解释 The stationary phase is the substance which is fixed in place for the chromatography procedure.A molecular sieve is a material containing tiny pores of a precise and uniform size that is used as an adsorbent for gases and liquids.When the mobile phase is gas,it is called eluant gas.The mobile phase is the phase which moves in a definite direction.In statistics,normalization refers to the division of multiple sets of data by a common variable in order to negate that variable's effect on the data,thus allowing underlying characteristics of the data sets to be compared.Microinjector is a kind of injector which can make injection in a very small volumn.An injector,ejector,steam ejector or steam injector is a pump-like device that uses the Venturi effect of a converging-diverging nozzle to convert the pressure energy of a motive fluid to velocity energy which creates a low pressure zone that draws in and entrains a suction fluid and then recompresses the mixed fluids by converting 。