一、引言 迄今为止,把放射性卤素特别是它的短寿命核素引入有机化合物的主要方法是同位素交换法。但在实际工作中对某些体系,由于交换速度太小而常常不便使用,近年来发展了若干快速交换法,如衰变诱导交换,酶仅交换,熔融交换,和其它方法。这些方法在某些情况下使用,确较一般同位素交换法更为有效。 I. INTRODUCTION So far, the main method of introducing radioactive halogen, especially its short-lived nuclides into organic compounds, is the isotope exchange method. However, in practical work, some systems are often inconvenient to use due to the small exchange rate. In recent years, several rapid exchange methods have been developed, such as decay-induced exchange, enzyme-only exchange, melt exchange, and other methods. These methods are used in some cases and indeed more effective than the general isotope exchange method.