Vacuum ultraviolet absorption spectroscopy system and method

摘要

An efficient absorption spectroscopy system is provided. The spectroscopy system may be configured to measure solid, liquid or gaseous samples. Vacuum ultra-violet wavelengths may be utilized. Some of the disclosed techniques can be used for detecting the presence of trace concentrations of gaseous species. A preferable gas flow cell is disclosed. Some of the disclosed techniques may be used with a gas chromatography system so as to detect and identify species eluted from the column. Some of the disclosed techniques may be used in conjunction with an electrospray interface and a liquid chromatography system so as to detect and identify gas phase ions of macromolecules produced from solution. Some of the disclosed techniques may be used to characterize chemical reactions. Some of the disclosed techniques may be used in conjunction with an ultra short-path length sample cell to measure liquids.

主权项

1. A gas chromatography analysis system, comprising:
a gas chromatography column, the gas chromatography column configured to provide at least one gas analyte to be analyzed; a gas flow cell coupled to the gas chromatography column so as to receive a flow of the analyte from the gas chromatography column; a heater thermally coupled to gas flow cell, the heater elevating the temperature of the gas flow cell so as to prevent condensation in the gas flow cell; a light source mechanically coupled to the gas flow cell; and a detector mechanically coupled to the gas flow cell, the gas flow cell configured to pass light from the light source through the analyte to the detector for detecting a property of the analyte and the gas chromatography analysis system configured to allow for movement of the gas flow cell from thermal expansion of the gas flow cell by allowing for at least one of the light source and the detector to move, the movement being allowed by at least one of the light source and the detector being coupled to a support structure in a moveable manner and being mechanically coupled to the gas flow cell such that thermal expansion of the gas flow cell moves at least one of the light source and the detector in relation to the support structure.