reverse isotopic dilution method

例句：

1. 1. The reverse isotopic dilution method was used to determine the concentration of heavy metals in soil samples.
   使用反同位素稀释法测定土壤样品中重金属的浓度。
2. 2. This technique involves using a radioactive isotope as a tracer and measuring its decay rate tocalculate the amount of the substance being analyzed.
   这种方法涉及使用放射性同位素作为示踪剂，测量其衰变速率以计算待分析物质的量。
3. 3.In this study, we applied the reverse isotopic dilution method to analyze the bioavailability of a new drug candidate.
   在本研究中，我们应用了反同位素稀释法来分析新型药物候选物的生物可用性。