Quantum Cascade Laser Infrared Spectroscopy for Online Monitoring of Hydroxylamine Nitrate
- Oak Ridge National Laboratory, USA, The Bredesen Center at the University of Tennessee Knoxville, USA
- Oak Ridge National Laboratory, USA
We describe a new approach for high sensitivity and real-time online measurements to monitor the kinetics in the processing of nuclear materials and other chemical reactions. Mid infrared (Mid-IR) quantum cascade laser (QCL) high-resolution spectroscopy was used for rapid and continuous sampling of nitrates in aqueous and organic reactive systems, using pattern recognition analysis and high sensitivity to detect and identify chemical species. In this standoff or off-set method, the collection of a sample for analysis is not required. To perform the analysis, a flow cell was used for in situ sampling of a liquid slipstream. A prototype was designed based on attenuated total reflection (ATR) coupled with the QCL beam to detect and identify chemical changes and be deployed in hostile environments, either radiological or chemical. The limit of detection (LOD) and the limit of quantification (LOQ) at 3 σ for hydroxylamine nitrate ranged from 0.3 to 3 and from 3.5 to 10 g·L −1 , respectively, for the nitrate system at three peaks with wavelengths between 3.8 and 9.8 μ m.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1472188
- Alternate ID(s):
- OSTI ID: 1476433
- Journal Information:
- International Journal of Analytical Chemistry, Journal Name: International Journal of Analytical Chemistry Vol. 2018; ISSN 1687-8760
- Publisher:
- Hindawi Publishing CorporationCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
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