前言有机化合物纯度测定对于化学制品的质量检定和控制以及研究工作都是很重要的。通常人们利用物质掺入杂质后,熔点或冰点的降低来确定杂质的含量或物质的纯度。但这种传统的分析方法不但耗时长(数小时至几天)、使用样品量大(几十至上百克),而且要求有准确的测温装置,又缺少商品化仪器,因而其应用范围受到一定限制,特别对难制备的化合物或样品量不多的情况下,这类方法的缺点更为突出。60年代 Preface Determination of the purity of organic compounds for chemical quality control and research work are very important. Usually people use the material after the incorporation of impurities, melting point or freezing point to determine the reduction of the content of impurities or material purity. However, this traditional analysis method not only takes a long time (hours to days) but also uses a large amount of samples (tens to hundreds of grams), and requires an accurate temperature measuring device and lack of commercial instruments, so its application is limited Some limitations, especially for difficult to prepare compounds or small sample size, the shortcomings of such methods is more prominent. the 60’s