在廿世纪的初期,示踪原子开始应用于解决化学部门中理论上和生产上的各种问题。特别是对于一些比较复杂的问题;例如生物化学反应,有机化学中的反应历程等,示踪原子就具有更大的价值。大家都知道,一个有机化学反应,它所经过的路程,常常是一个争论的中心。一个反应过程常常有许多个反应机构(Mechanism)。其中那一个是正确的,使用示踪原子就能区别开来。关于示踪原子的一般技术和理论已有文章可以参考,因此,本文中 At the beginning of the twentieth century, tracer atoms began to be used to solve both theoretical and production problems in the chemical sector. Especially for some of the more complex issues; for example, biochemical reactions, reaction processes in organic chemistry, tracer atoms have greater value. As we all know, an organic chemical reaction, the distance it takes, is often at the center of a debate. There are often many reaction mechanisms in a reaction process. One of them is correct, using tracer atoms can distinguish them. There are articles on the general techniques and theories of tracer atoms that can be referred to, therefore, in this article