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Online fiber optic spectrophotometry [electronic resource].

Published
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1988.
Physical Description
Pages: 42 : digital, PDF file
Additional Creators
United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A fiber optic diode array process analyzer has been developed and installed in a radiochemical separations facility at the Savannah River Plant. The analyzer monitors the uranium and nitrate concentration of seven aqueous process streams in a uranium purification process. The analyzer remotely controls the sampling of each process stream and monitors the relative flow rate through each sampler. Spectrophotometric data from the analyzer is processed by multivariate data analysis to give both uranium and nitrate concentrations as well as an indication of the quality of the data. The analyzer system consists of a DuPont Instruments diode array process analyzer, xenon arc lamp, fiber-optic multiplexer, and IBM industrial AT computer. Fused silica optical fibers (600 micrometer core diameter) connect the analyzer to monitor up to ten locations in series. In addition to the seven process locations, the analyzer also monitors a reference optical fiber and an inline uranyl nitrate standard. Process stream samplers are controlled by Opto 22 hardware and electric solenoid valves interfaced to the analyzer computer through an RS-422 communication link. Absorption data from each location is fed into a Partial Least Squares (PLS) model of the uranyl nitrate system for conversion into uranium and nitrate concentrations. The model also outputs a residual variance which is a very sensitive indicator of interferences in the system and is used to verify the quality of the calculated results. Results from the analyzer computer are sent by another Opto 22 interface to a distributed control system which is used to run the uranium purification process. 8 refs., 22 figs., 1 tab.
Report Numbers
E 1.99:dp-ms-88-186
E 1.99: conf-881143-1
conf-881143-1
dp-ms-88-186
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
01/01/1988.
"dp-ms-88-186"
" conf-881143-1"
"DE89002220"
American Institute of Chemical Engineers annual convention, Washington, DC, USA, 27 Nov 1988.
O'Rourke, P.E.; Van Hare, D.R.; Prather, W.S.
Savannah River Lab., Aiken, SC (USA)
Funding Information
AC09-76SR00001
View MARC record | catkey: 14402053