论文部分内容阅读
中子活化分析具有极高灵敏度(10~(-7)％),控制电位电解可从1千倍量以上的其他物质中分出少于微克量的杂质而具有很高选择性,热解石墨,即纯度极高的石墨,其放射化截面很小,故结合三者用于同时测定几种极少量元素,而在其质谱上仍能容易分辨出其放射化强度的光度峯。由于热解石墨的背景很小(截面小),故方法的灵敏度只决定于元素的放射化分析的灵敏度(元素的放射化截面)和反应器的流量。
Neutron activation analysis with high sensitivity (10 ~ (-7)%), the control potential electrolysis can be separated from less than one microgram amount of other substances in less than micrograms of impurities and has a high selectivity, pyrolytic graphite , That is extremely pure graphite, the radiation cross section is very small, so the combination of three for the simultaneous determination of several very small amount of elements, and in its mass spectrometry can still be easily identified the radiometric intensity of the peak. Because pyrolytic graphite has a small background (small cross section), the sensitivity of the method depends only on the sensitivity of the element’s radiometric analysis (elemental radiochemical cross-section) and the reactor flow rate.