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催化动力学分析法是通过测量受均相催化所加速的化学反应的速度,对该反应的催化剂(或活化剂、阻抑剂等)进行定量测定的痕量分析方法,它具有很高的灵敏度和较好的重现性,但选择性较差。Otto等指出,单靠改变催化反应的条件,有时仍不能提高催化分析认的选择性,这时可把样品预先分离。包括色谱法在内的分离技术与催化动力学分析法相结合,是增加其选择性的有效途径之一。初期的工作是把纸色谱、薄层色谱和柱色谱用作样品预分离的手段,后为高效液相色谱、气相色谱与催化动力学分析法联用也取得了成功。本文拟就上述内容作简要综述,分三方面介绍应用实例。
Catalytic kinetic analysis is a method of trace analysis that quantitatively measures the catalyst (or activator, inhibitor, etc.) of the reaction by measuring the rate of the chemical reaction accelerated by the homogeneous catalysis. It has high sensitivity And better reproducibility, but less selective. Otto et al. Show that the selectivity of catalysis can sometimes not be improved by simply changing the conditions of the catalytic reaction, in which case the sample can be separated beforehand. The combination of separation techniques including chromatography and catalytic kinetic analysis is one of the effective ways to increase their selectivity. The initial work was to use paper chromatography, thin-layer chromatography and column chromatography as a means of pre-separation of samples, followed by high-performance liquid chromatography, gas chromatography and catalytic kinetic analysis was also successful. This article intends to make a brief summary of the above contents, and introduces application examples in three aspects.