摘要
采用降低电子轰击型离子源(EI源)中轰击电子能量的方法定量分析了西安地区天然空气中的Ne。将EI源中的轰击电子能量设置为43.5 eV,以去除40Ar2+对20Ne+的干扰。以此参数为核心,优化了其他离子源参数。利用在线同位素稀释法对西安地区天然空气中的氖进行了5次分析,相对标准偏差为0.6%,平均值与文献值在2%以内符合,说明这种去干扰的方法可用于氖的定量分析。
Natural Neon of Xi＇an area was quantitatively analyzed by lowering impact electron energy in EI ion source.Impact electron energy was set to 43.5 eV to eliminate the 40Ar2＋ interference with 20Ne＋.Based on this core parameter,other parameters of EI ion source were optimized.Then on-line isotope dilution method was used to analyze natural neon of Xi＇an area for five times,the relative standard deviation was 0.6% and the average value accords with the reported data in 2%.So this eliminating interference method can be used to quantitatively analyze neon.
出处
《同位素》
CAS
2010年第3期158-162,共5页
Journal of Isotopes
关键词
氖
定量分析
电子轰击能量
EI源
Neon
quantitative analysis
electron impact energy
EI ion source
