Raman spectra have been measured for a number of nitrates, nitrites, sulfates, ferrocyanides, and ferricyanides, both in the solid phase and in aqueous solution. Accurate locations of peak maxima are given. Limits of detection for some of the compounds are given for solutions and for solid mixtures in NaNO3. Preliminary measurements have been made on core material recovered from the storage tanks on the Hanford site in Richland, Washington. Representative spectra are presented, showing that it is possible to observe responses of individual components from measurements made directly on untreated cores, with the use of a fiberoptic sampling probe.

Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. An infrared spectroscopy-based technique. w i t h remote fiber optic probes, is being developed for the i n situ measurement of moisture i n high-level tank wastes. The strong infrared absorption of water provides a sensitive technique t o sense the water content of high-level waste materials for both ex situ (measurements on extruded t a n k cores) and i n situ t a n k applications. Development of this technique was j o i n t l y supported by the U.S. Department o f Energy's EM-50 Office of Technology Development Support and EM-30 Tank Waste Safety and Tank Waste Remediation Systems Programs. V ONS ITE 9 WHC-EP-0839 DISTRIBUTION (cont.

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of FY-95 NIR NIA 2 1 Moisture Measurement Development and Implementation Act ivities t1 Approved u l c m n t s t1 Disapproved u l c m n t s