High accuracy absorbance spectrophotometers

Patent · Tue Dec 11 04:00:00 EST 2018

OSTI ID:1497080

O'Rourke, Patrick E.; Lascola, Robert J.; Immel, David; Kyser, III, Edward A.; Plummer, Jean R.

Spectrophotometers and spectroscopy processes are described that can provide for in-line calibration at every spectral acquisition as well as for continuous response correction during sample processing. The spectrophotometers include multiple polychromatic light sources that include characteristic emission spectra for use as an internal wavelength drift calibration system that is independent of environmental factors. Correction functions provided by the internal calibration process can be applied continuously and across an entire sample spectrum. The intensity response of each spectrometer in a spectrophotometer can also be monitored and continuously corrected for stray light, dark current, readout noise, etc.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC09-08SR22470; AC09-96SR18500
• Assignee: Savannah River Nuclear Solutions, LLC (Aiken, SC)
• Patent Number(s): 10,151,633
• Application Number: 15/428,639
• OSTI ID: 1497080
• Country of Publication: United States
• Language: English