A small high irradiance laser ablation and ionization time-of-flight mass spectrometer with orthogonal sample introduction was described. Nearly uniform relative sensitivity coefficients as well as satisfactory resolving power(~2200) were achieved for most of metal elements. Fairly good signal stability was obtained by automated step moving of the sample stage in short time intervals. Interferences of multiply charged ions and polyatomic ions were nearly eliminated in the spectrum by utilizing helium as the buffer gas in the ion source,which resulted in a relative clean background. Standardless semi-quantitative analysis of steel was realized and the limits of detection are about 10-6 g/g for most of metal elements.
展开▼
机译：描述了一种带有正交样品引入的小型高辐照度激光烧蚀和电离飞行时间质谱仪。大多数金属元素的相对灵敏度系数几乎均一，并且具有令人满意的分辨力（〜2200）。通过在短时间间隔内自动移动样品台，可获得相当好的信号稳定性。利用氦气作为离子源中的缓冲气体，几乎消除了多电荷离子和多原子离子的干扰，从而产生了相对干净的背景。对钢进行了无标准的半定量分析，大多数金属元素的检出限约为10-6 g / g。
展开▼
