大气压基体辅助激光解析离子源发展及其应用

The Development and Applications of Atmospheric Pressure Matrix-Assisted Laser Desorption/Ionization

介绍了国际上新出现的一种离子源———大气压基体辅助激光解析离子源(at mospheric pressure matrix-assisted laser desorption/ionization,AP-MALDI)。该离子源是在真空MALDI的基础上研究发展起来的,广泛应用于生物大分子及其相关领域的研究。该离子源较真空MALDI电离更加柔和,产生的碎片离子更少,又由于其工作在大气压下,可作为外接离子源方便地与各类质谱分析器联用,大大扩展了基体辅助激光解析离子源的应用范围。文章详细介绍了AP-MALDI的基本原理、结构及技术进展。此外,还对该离子源在生物高聚物分析方面的最新应用进行了介绍。

A kind of new ionization source, atmospheric pressure matrix-assisted laser desorption/ionization （AP-MALDI）, is introduced in the present paper. This ionization source was studied and developed on the basis of vacuum MALDI. It has been applied widely in the field of biomacromolecule. This ionization source has softer analyte ionization and produces fewer fragmen- tations compared with conventional vacuum MALDI. It works at atmospheric pressure, therefore eases to be coupled to mass spectrometers, acting as an external ion source, and greatly extends the application fields of MALDI. The principle, configuration and technical development of AP-MALDI are described detailedly. Moreover, the current applications and prospect of the device in analyzing biopolymers are summarized.