一、前言气相色谱是现代科研和生产中一项非常有效的分离、分析工具。但是,气相色谱分析工作中的“取样”,要保证在任何情况下都能取到“代表性样品”,却并非易事。此外,还由于色谱进样技术本身存在的特殊性,致使取样更加复杂化。所以色谱进样技术长期以来一直是人们十分关心的问题。色谱实践证明,分析结果的准确度和方法的适用范围,除与被分析样品的物化性质(物理状态,极性和挥发性)、浓度范围等有关外,还与进样系统的结构,进样方式和进样技巧等操作因素有关。因此,在已经发展得相当完善的色谱分析技术中,进样技术 I. Introduction GC is a very effective separation and analysis tool in modern scientific research and production. However, the “sampling” of gas chromatography work is not easy to ensure that “representative samples” can be obtained under any circumstances. In addition, due to the particularity of chromatographic sampling technology itself, resulting in more complicated sampling. So chromatographic injection technology has long been a matter of great concern to people. Chromatography has proved that the accuracy of the analytical results and the scope of the method, in addition to the physical and chemical properties of the sample being analyzed (physical state, polarity and volatility), the concentration range, etc., but also with the injection system structure, injection Methods and injection techniques and other operating factors. Therefore, in the already well developed chromatographic analysis technology, injection technology