A preliminary comparison of time-of-flight laser ionization and secondary ion mass spectrometry in solids analysis
A preliminary comparison of time-of-flight laser ionization and secondary ion mass spectrometry in solids analysis
复制标题
DOI：
10.1016/j.sab.2020.105824
复制
发表时间：
2020-05
期刊：
影响因子：
--
通讯作者：
Zhouyi Xu;Le Hang;Qiao Lu;Ning Guo;W. Hang
中科院分区：
文献类型：
--
作者：
Zhouyi Xu;Le Hang;Qiao Lu;Ning Guo;W. Hang
本文对缓冲气体辅助激光电离飞行时间质谱（LI-TOFMS）和飞行时间二次电离质谱（TOF-SIMS）进行了初步比较。参考钢样品和土壤样品被用作实验中的代表性金属和氧化物固体样品。重点比较了它们的光谱特性和固体样品中元素的无标定量能力。针对氧离子产额低的特点，提出了一种新的无标样氧化物定量分析方法，该方法利用被测元素的共同氧化态计算氧浓度，从而得到氧的强度。结果表明，两种方法均能满足无标样半定量分析的要求。然而，LI-TOFMS提供的光谱干扰少，并导致更多的确定元素和准确的定量结果。
In this work, a preliminary comparison was made between buffer-gas-assisted laser ionization time-of-flight mass spectrometry (LI-TOFMS) and time-of-flight secondary ionization mass spectrometry (TOF-SIMS). A reference steel sample and a soil sample were used as representative metal and oxide solid samples in the experiment. The comparison was focused on their spectral characteristics and standard-less quantitative capability in determine elements in solid samples. Since the oxygen has low ion yield, a new standard-less quantitative method was proposed for oxides analysis, which derives the oxygen intensity from other detected elements using their common oxidation states in calculation of oxygen concentration. The results indicate that both techniques meet the needs of standard-less semi-quantitative analysis. However, LI-TOFMS offers spectra with less interference, and leads to more determined elements and accurate quantitative results.