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Instrument Control Software for Spectrophotometers

Technical Report ·
DOI:https://doi.org/10.2172/2319021· OSTI ID:2319021
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  1. Savannah River National Laboratory (SRNL), Aiken, SC (United States)
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SRNL has developed instrument control software for diode array spectrophotometers that can be used for real time monitoring of dynamic systems. This software has evolved through several iterations as instruments have been developed for use in processing facilities at Savannah River Site. There are several noteworthy features of the software. The wavelength calibration is checked and updated in real time against reference emission lines that are designed into the instrument light source. Nonlinearities and offsets associated with the intensity response of the instruments are characterized, and absorbance spectra are appropriately corrected. These actions are necessary for accurate calculation of an absorbance spectrum from the intensity responses of two individual diode array detectors. The corrections also result in the spectra obtained for a particular sample by two (or more) different diode array detector pairs being nearly identical. This property assures consistent measurements at multiple locations with different instruments. It also permits the use of a single analyte calibration across many instruments without modification and without loss of accuracy
Research Organization:
Savannah River National Laboratory (SRNL), Aiken, SC (United States)
Sponsoring Organization:
USDOE Office of Environmental Management (EM)
DOE Contract Number:
89303321CEM000080
OSTI ID:
2319021
Report Number(s):
SRNL--STI-2023-00509
Country of Publication:
United States
Language:
English

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Related Subjects

47 OTHER INSTRUMENTATION
97 MATHEMATICS AND COMPUTING
online monitoring
spectroscopy