Author: Miles Sowden
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A method has been developed that uses uranium hexafluoride as the internal standard to quantitatively determine trace impurities in the uranium hexafluoride using relative response factors. A computer program was written to control the mass spectrometer and determine the concentrations of target impurities present. Overlapping spectra are deconvoluted using the Gauss-Seidel iterative method. The composition of the sample is determined by comparing the peak height ratios of the target impurities to the internal standard. Measurement parameters are easily modified using the menu driven program. A flexible database allows the list of target impurities to be extended to accommodate any changes in analytical requirements. The method has been adapted for automatic on-line measurements. The technique was evaluated by analysing a number of carefully prepared standards. Nine target impurities were studied which ranged in concentration from parts per million to percentages. An overall precision of fifteen percent was obtained.
Quantitative Mass Spectrometric Determination of Trace Impurities in Uranium Hexafluoride Using Relative Response Factors
Author: Miles Sowden
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A method has been developed that uses uranium hexafluoride as the internal standard to quantitatively determine trace impurities in the uranium hexafluoride using relative response factors. A computer program was written to control the mass spectrometer and determine the concentrations of target impurities present. Overlapping spectra are deconvoluted using the Gauss-Seidel iterative method. The composition of the sample is determined by comparing the peak height ratios of the target impurities to the internal standard. Measurement parameters are easily modified using the menu driven program. A flexible database allows the list of target impurities to be extended to accommodate any changes in analytical requirements. The method has been adapted for automatic on-line measurements. The technique was evaluated by analysing a number of carefully prepared standards. Nine target impurities were studied which ranged in concentration from parts per million to percentages. An overall precision of fifteen percent was obtained.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A method has been developed that uses uranium hexafluoride as the internal standard to quantitatively determine trace impurities in the uranium hexafluoride using relative response factors. A computer program was written to control the mass spectrometer and determine the concentrations of target impurities present. Overlapping spectra are deconvoluted using the Gauss-Seidel iterative method. The composition of the sample is determined by comparing the peak height ratios of the target impurities to the internal standard. Measurement parameters are easily modified using the menu driven program. A flexible database allows the list of target impurities to be extended to accommodate any changes in analytical requirements. The method has been adapted for automatic on-line measurements. The technique was evaluated by analysing a number of carefully prepared standards. Nine target impurities were studied which ranged in concentration from parts per million to percentages. An overall precision of fifteen percent was obtained.
The Quantitative Mass Spectrometric Determination of Trace Impurities in Uranium Hexafluoride Using Relative Response Factors
The Quantitive Mass Spectrometric Determination of Trace Impurities in Uranium Hexafluoride Using Relative Response Factors
Determination of Trace Impurities in Uranium Hexafluoride by an Inductively Coupled Argon Plasma Spectrometer
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A procedure has been developed to determine 21 trace impurity elements in uranium hexafluoride, using inductively coupled argon plasma emission spectrometry (ICAP). The method consists of a liquid-liquid extraction to separate uranium from the trace impurities with a mixture of tri-(2-ethyl-hexyl)-phosphate (TEHP) and heptane. The raffinate containing the elements is subsequently analyzed by ICAP. The impurity elements which can be analyzed by this method are: Al, B, Ba, Be, Bi, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Na, Ni, Pb, Sb, Sn, Ti, V and Zn.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A procedure has been developed to determine 21 trace impurity elements in uranium hexafluoride, using inductively coupled argon plasma emission spectrometry (ICAP). The method consists of a liquid-liquid extraction to separate uranium from the trace impurities with a mixture of tri-(2-ethyl-hexyl)-phosphate (TEHP) and heptane. The raffinate containing the elements is subsequently analyzed by ICAP. The impurity elements which can be analyzed by this method are: Al, B, Ba, Be, Bi, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Na, Ni, Pb, Sb, Sn, Ti, V and Zn.
The Analysis of Trace Impurities in Uranium Compounds Using Spark-source Mass Spectrometry
The Analysis of Trace Impurities in Uranium Compounds Using Spark-source Mass Spectrometry
Masters Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 1192
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 1192
Book Description
Quantitative Determination of Priority Pollutants--Gas Chromatography-Mass Spectrometry Response Factor Variation
Author: R. Devine
Publisher:
ISBN:
Category : Compound chromatography variation
Languages : en
Pages : 13
Book Description
The quantitative gas chromatography-mass spectroscopy-data system technique recommended by the Environmental Protection Agency for the determination of "extractable priority pollutants" in industrial effluent extracts has been evaluated. For standard solutions, the relative standard deviation (correlation coefficient) for selected priority pollutant response factors was considered as a measure of the precision of one aspect of the quantification of organic compounds in water extracts. It has been shown that for compounds similar in physical properties to the internal standard (anthracene-d10), single-level response factors can be determined at low nanogram levels with correlation coefficients as good as 1.2 percent. Data are presented that suggests that, for compounds that are "well behaved" from the viewpoint of consistent and reproducible gas chromatographic elution, the correlation coefficient of the response factor can be independent of the ion employed for quantification. Correlation coefficients of response factors for packed column and capillary column experiments demonstrated, not surprisingly, that response factor variation is compound dependent. For most cases cited, the relative standard deviation (RSD) of the response factor was less than 20 percent. However, for certain priority pollutants, response factor variation indicated that the recommended analysis protocol has serious deficiencies.
Publisher:
ISBN:
Category : Compound chromatography variation
Languages : en
Pages : 13
Book Description
The quantitative gas chromatography-mass spectroscopy-data system technique recommended by the Environmental Protection Agency for the determination of "extractable priority pollutants" in industrial effluent extracts has been evaluated. For standard solutions, the relative standard deviation (correlation coefficient) for selected priority pollutant response factors was considered as a measure of the precision of one aspect of the quantification of organic compounds in water extracts. It has been shown that for compounds similar in physical properties to the internal standard (anthracene-d10), single-level response factors can be determined at low nanogram levels with correlation coefficients as good as 1.2 percent. Data are presented that suggests that, for compounds that are "well behaved" from the viewpoint of consistent and reproducible gas chromatographic elution, the correlation coefficient of the response factor can be independent of the ion employed for quantification. Correlation coefficients of response factors for packed column and capillary column experiments demonstrated, not surprisingly, that response factor variation is compound dependent. For most cases cited, the relative standard deviation (RSD) of the response factor was less than 20 percent. However, for certain priority pollutants, response factor variation indicated that the recommended analysis protocol has serious deficiencies.
Passive Nondestructive Assay of Nuclear Materials
Author: Doug Reilly
Publisher:
ISBN: 9780160327247
Category : Non-destructive testing
Languages : en
Pages : 700
Book Description
Publisher:
ISBN: 9780160327247
Category : Non-destructive testing
Languages : en
Pages : 700
Book Description
Nuclear Forensic Analysis
Author: Kenton J. Moody
Publisher: CRC Press
ISBN: 143988062X
Category : Law
Languages : en
Pages : 516
Book Description
Now in its second edition, Nuclear Forensic Analysis provides a multidisciplinary reference for forensic scientists, analytical and nuclear chemists, and nuclear physicists in one convenient source. The authors focus particularly on the chemical, physical, and nuclear aspects associated with the production or interrogation of a radioactive sample.
Publisher: CRC Press
ISBN: 143988062X
Category : Law
Languages : en
Pages : 516
Book Description
Now in its second edition, Nuclear Forensic Analysis provides a multidisciplinary reference for forensic scientists, analytical and nuclear chemists, and nuclear physicists in one convenient source. The authors focus particularly on the chemical, physical, and nuclear aspects associated with the production or interrogation of a radioactive sample.