Determination of technetium-99 in aqueous samples by isotope dilution inductively coupled plasma-mass spectrometry
An isotope dilution/inductively coupled plasma mass spectrometric method (ID/ICP-MS) for measuring the concentration of technetium-99 in aqueous samples was developed at the Savannah River Technology Center (SRTC). The procedure is faster than radiometric techniques, is also less subject to interferences, and has equal or better detection limits. It is currently being used to measure the concentration of {sup 99}Tc in samples of Savannah River water collected in the vicinity of the Savannah River Site. In this method, one liter samples of water are spiked with {sup 97}Tc. After equilibration, the technetium is extracted from the sample with a chromatographic resin. Interfering elements, molybdenum and ruthenium, are either not retained by the resin or are washed off with dilute nitric acid. The technetium is then eluted with more concentrated nitric acid, and the {sup 99}Tc/{sup 97}Tc ratio in the eluant is measured with an ICP-MS. The {sup 99}Tc concentration in the original sample is calculated from the {sup 99}Tc/{sup 97}Tc ratio. The chemical recovery of the extraction procedure is greater than 90%. The detection limit of the instrument, taken as three times the background counts at m/z = 99, is 0.6 part per trillion (ppt). The detection limit of the procedure, taken as three times the standard deviation of several reagent blank analyses, is 0.33 pCi/L.
- Research Organization:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 7250453
- Report Number(s):
- WSRC-MS-92-141; CONF-9209120-1; ON: DE92040832
- Resource Relation:
- Conference: 3. international conference on nuclear and radiochemistry, Vienna (Austria), 7-11 Sep 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FRESH WATER
QUANTITATIVE CHEMICAL ANALYSIS
TECHNETIUM 99
MASS SPECTROSCOPY
AQUEOUS SOLUTIONS
DETECTION
ISOTOPE DILUTION
RADIOACTIVE MATERIALS
SAVANNAH RIVER
TECHNETIUM 97
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL ANALYSIS
DAYS LIVING RADIOISOTOPES
DISPERSIONS
ELECTRON CAPTURE RADIOISOTOPES
HOURS LIVING RADIOISOTOPES
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MATERIALS
MIXTURES
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
RADIOISOTOPES
RIVERS
SOLUTIONS
SPECTROSCOPY
STREAMS
SURFACE WATERS
TECHNETIUM ISOTOPES
TRACER TECHNIQUES
WATER
YEARS LIVING RADIOI
YEARS LIVING RADIOIS
540330* - Environment
Aquatic- Radioactive Materials Monitoring & Transport- (1990-)
400102 - Chemical & Spectral Procedures