The chemical tracer, especially the perfluorocarbon tracer and sulphur hexafluoride, has been used much more popularly than the radioactive tracer nowadays. 化學示蹤劑已取代放射性示蹤劑在混相驅中的主導地位，其中，全氟環烷烴和六氟化硫是目前現場廣泛試驗和應用的化學氣體示蹤劑。
The highly sensitive radio tracer technique is often used to follow tagged synthetic soil ingredients. 高靈敏度的放射性示蹤技術，已經常用於跟蹤標誌污垢成分的試驗。
The chemical tracer, especially the perfluorocarbon tracer and sulphur hexafluoride, has been used much more popularly than the radioactive tracer nowadays. 化學示蹤劑已取代放射性示蹤劑在混相驅中的主導地位，其中，全氟環烷烴和六氟化硫是目前現場廣泛試驗和應用的化學氣體示蹤劑。
