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Proceedings Paper

Novel spectroscopic cell for process monitoring
Author(s): Howard Mark; Terry R. Todd
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Paper Abstract

A new flow-through high-pressure optical cell, with unique design features, allows spectroscopic monitoring of process streams. The novel design features no windows, has no dead volume and minimizes sample perturbations. A monolithic sapphire block serves as both pressure containment and optical material. The sample chamber is an integral part of the sapphire; thus creating the small, no dead volume sample chamber, while maintaining high optical throughput. Using an auxiliary optical interface adapter, this flow probe can be easily coupled to a fiber optic based spectrometer. The probe is ideally suited for low volume applications, such as pilot plants, GCs, etc. Being of sapphire construction, the probe functions from UV through the near-infrared and has an equivalent pathlength of 2.1 mm. The application to spectral measurements in the near-infrared and visible regions will be illustrated. Direct spectral comparisons to samples run in the probe and in a 2 mm cuvette will be made.

Paper Details

Date Published: 26 February 1999
PDF: 9 pages
Proc. SPIE 3537, Electro-Optic, Integrated Optic, and Electronic Technologies for Online Chemical Process Monitoring, (26 February 1999); doi: 10.1117/12.341035
Show Author Affiliations
Howard Mark, Near Infrared Research Corp. (United States)
Terry R. Todd, UOP Guided Wave (United States)

Published in SPIE Proceedings Vol. 3537:
Electro-Optic, Integrated Optic, and Electronic Technologies for Online Chemical Process Monitoring
Mahmoud Fallahi; Mahmoud Fallahi; Robert J. Nordstrom; Terry R. Todd, Editor(s)

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