同位素示踪法所利用的放射性核素,与自然界存在的相应普通核素化学性质是相同的,只是能够不断地放出特征射线。因此,用同位素作为一种标记,制成含有同位素标记的化合物,用核探测器追踪它的位置,就可让化学变化原理“原形毕露”。一、“侦查”氧化还原原理例1下列反应或转化中, The radionuclides used by the isotope tracer method are the same as the corresponding normal radionuclide compounds present in nature, but they can only emit characteristic rays continuously. Therefore, using isotopes as a marker to make compounds containing isotope labels and tracking their position with nuclear probes, the principle of chemical change can be described as “original.” I. “Investigative” redox principle Example 1 In the following reactions or transformations,