1. Isotopic tracer technology is a technology that uses radioisotopes or enriched rare stable nuclides as tracers to study various scientific problems in the fields of physics, chemistry, biology, environment and materials.
2. A tracer is a substance consisting of tracer atoms or molecules.
3. Tracer atoms (also called labeled atoms) are atoms whose nuclear properties are easy to detect.
4. Compounds containing tracer atoms are called labeled compounds.
5. In theory, almost all compounds can be labeled by tracer atoms.
6. A compound whose atoms are labeled is called a single labeled compound; Compounds with two atoms labeled are called double labeled compounds (such as H2O).
