Spectroscopic sample cell with reduced volume

Abstract

A sample cell can be designed to minimize excess gas volume. Described features can be advantageous in reducing an amount of gas required to flow through the sample cell during spectroscopic measurements, and in reducing a time (e.g. a total volume of gas) required to flush the cell between sampling events. In some examples, contours of the inners surfaces of the sample cell that contact the contained gas can be shaped, dimensioned, etc. such that a maximum clearance distance is provided between the inner surfaces at one or more locations. Systems, methods, and articles, etc. are described.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Utility Application No. 14 / 073,711, filed November 6, 2013, entitled "Reduced Volume Spectroscopic Sample Cell," the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The subject matter disclosed herein relates to spectroscopic analysis, eg, for the detection, quantification, etc. of one or more analyte compounds. Background technique [0004] Spectral analysis essentially relies primarily on the detection and quantification of the emission, absorption or scattering of radiation. In gas-phase spectroscopy, emission, absorption, or scattering of radiation occurs by individual molecules of one or more compounds present along the radiation path between a radiation source and a detector. At least some of the radiation emitted along the path can be absorbed or scattered, or other radiation can be emitted by molecules in the path of the r...

AI Technical Summary

Problems solved by technology

Movement of the detector relative to the radiation source or other changes in the radiation path between the radiation source and the detector can lead to deviations in analyzer performance, analysis errors, lack of reproducibility, etc.

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