The real-time analysis of gases by direct sampling-mass spectrometry:elemental and molecular applications

摘要

Real-time analysis of gases for volatile organic compounds or elements is required for a number of applications.Direct sampling-mass spectrometry(DS-MS) is one approach to solve these analytical problems.Thisarticle reviews various instrumental configurations and applications of DS-MS.Inlet systems employed for DS-MS include membranes,microtrap interfaces,atmospheric sampling glow discharge ionization,atmospheric pressure ionization,microwave plasma ionization,andcapillary restrictors.Theuse of laser-based ionization methods for DS-MS is described,including resonance-enhanced multiphoton ionization and single photon ionization.