气相色谱分析中,液体样品大多采用微量注射器进样。定量重现性不好,影响检测结果的准确性。中国科学院大连化学物理研究所编“《气相色谱法》”一书166页介绍,在商品微量注射器上装一固定卡子,可使进样重现性得到改善。但抽取样品时难以排尽注射器针管内气体,定量精度仍不理想。本定量器制作简单,无需更动注射器本体,重现性好。其具体制作和使用法见图及说明在设计制作时,需从l_0定值开始,但l_0不一定必须相当于一整数值(μl),只要求是一固定值,能保证标准与样品进样体积相等即可。例如设计l_0相当 In gas chromatography, most liquid samples are injected using a micro syringe. Poor quantitative reproducibility, the accuracy of the test results. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, “” Gas Chromatography "a book on page 166 introduced in the commodity micro-syringe mounted on a fixed clamp, injection reproducibility can be improved. However, it is difficult to drain the sample syringe needle gas, quantitative accuracy is still not ideal. The doser is easy to make and does not need to change the syringe body, so the reproducibility is good. The specific production and use of law see the map and instructions in the design and production, starting from the l_0 value set, but l_0 does not necessarily have to be equivalent to an integer value (μl), the only requirement is a fixed value, to ensure standard and sample injection Equal volume can be. For example, design l_0 quite