阿司匹林的真空紫外光电离光解离质谱研究

Aspirin was investigated with infrared laser desorption/vacuum ultraviolet photoionization and photodissociation mass spectrometry(IR LD/VUV PIMS) technique. Due to the tunability of VUV photon energy, the mass spectra of aspirin at different photon energies were measured. Combining theoretical calculation, the proposed dissociation pathways of precursor cations were well depicted.     

质谱仪离子导向装置的原理、应用和进展

离子导向装置（ion guide）是传输离子的重要手段。在质谱仪器中,离子导向装置是离子光学（ion optics）系统的重要组成部分,是联络处于低真空（或大气压）电离源和质量分析器的桥梁。离子导向装置不仅用于传输离子,还可降低离子的空间发散度和能量分散度,使离子最大限度到达质量分析器。本工作主要对一些常用的离子导向装置的原理、应用和进展进行了评述,并展望了未来的发展。