Online fiber-optic spectrophotometry
To improve the timeliness of chemical information and reduce the potential for personnel radiation exposure, the Savannah River Laboratory has developed online absorption spectrophotometers. Absorption spectrophotometers are rugged, precise instruments which, however, are susceptible to interference from other optically absorbing species and to changes in analyte absorbance due to different matrixes. Also, it is difficult and expensive to interface absorption spectrophotometers to SRP's radioactive processes. The fiber-optic spectrophotometer described solves these problems by combining three technologies: fiber optics, diode array spectrophotometers, and multivariate data analysis. A multiplexed fiber-optic light transmission system connects as many as ten process sample locations to a single remote spectrophotometer up to 100 meters distant. In addition to the sample locations, the spectrophotometer is also connected to reference and standard optical cells for online data validation and error checking. For each sample location, the spectrophotometer rapidly collects a series of absorption spectra from 300 to 820 nm. Spectra are tested for sample quality and integrity before analyte concentrations and residual spectra are computed from a multivariate model of the absorption characteristics of the chemical system. Residual spectra are tested to determine if any unknown interference or matrix effect may invalidate concentration results.
- Research Organization:
- Savannah River Lab., Aiken, SC (USA)
- DOE Contract Number:
- AC09-76SR00001
- OSTI ID:
- 5955544
- Report Number(s):
- DP-MS-87-100; CONF-8710168-1; ON: DE88001378
- Resource Relation:
- Conference: Du Pont process analyzers and instruments symposium, Wilmington, DE, USA, 14 Oct 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
PROCESS SOLUTIONS
SPECTROPHOTOMETRY
SAVANNAH RIVER PLANT
PROCESS CONTROL
SPECTROPHOTOMETERS
DESIGN
DATA ANALYSIS
FIBER OPTICS
ION EXCHANGE
MULTIPLEXERS
ON-LINE MEASUREMENT SYSTEMS
PLUTONIUM NITRATES
URANYL NITRATES
ACTINIDE COMPOUNDS
CONTROL
DISPERSIONS
ELECTRONIC EQUIPMENT
EQUIPMENT
MEASURING INSTRUMENTS
MIXTURES
NATIONAL ORGANIZATIONS
NITRATES
NITROGEN COMPOUNDS
ON-LINE SYSTEMS
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
SOLUTIONS
TRANSURANIUM COMPOUNDS
URANIUM COMPOUNDS
URANYL COMPOUNDS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
400102* - Chemical & Spectral Procedures
050800 - Nuclear Fuels- Spent Fuels Reprocessing