METHOD AND DEVICE FOR SAMPLE INTRODUCTION OF VOLATILE ANALYTES

摘要

The present invention relates to a simple thermal desorption gas introductio n interface for sample introduction of volatile analytes into an atomic spectroscopic detector. An injector is connected to the atomic spectroscopic detector via a first port. The injector further comprises a sealed second port for inserting the volatile analyte bound to a n extraction phase. A heating block surrounding the injector heats the injector to a predetermined temperature and keeps it substantially at the predetermined temperature. A carrier gas flow of inert gas is provided into the injector through a third port of the injector located in proximity to the second port. An auxiliary gas flow of inert gas is provided via forth port located between the third port and the atomic spectroscopic detector. The volatile analyte bound to an extraction phase is inserted into the injector, wherein the extraction phase is inserted through the seal of the second port for sealed exposure within the injector. The volatile analyte is then rapidly thermally desorbed from the extraction phas e through application of the heat and provision of the carrier gas flow and transporte d to the atomic spectroscopic detector in a gas flow comprising the carrier l;as flow and th e auxiliary gas flow.