12 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Microwave Ovens"  
Results: 1 - 12
open access

TECHNICAL EQUIVALENCE BETWEEN PERKIN-ELMER DRCe AND ELAN 6000 FOR THE ANALYSIS OF 238U IN URINE BIOASSAY SAMPLES

Description: The LLNL Bioassay Laboratory recently purchased a Perkin-Elmer DRCe ICP-MS (DRCe) to replace the existing Perkin-Elmer Elan 6000 ICP-MS (Elan 6000) used for the analysis of {sup 238}U in urine bioassay samples. In accordance with section 5.7.2 of DOE-STD-1112-98, 'The Department of Energy Laboratory Accreditation Program for Radiobioassay', this document demonstrates that the DRCe is technically equivalent to the Elan 6000. This paper documents: (1) Minor changes made in the procedure to improv… more
Date: September 5, 2007
Creator: Wong, C T & Collins, L J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low density inorganic foams fabricated using microwaves

Description: The objective of our work was to determine if high temperature foams could be made using microwave heating; and if so, to investigate some of their properties. Several foams were made and their compressive strengths, tensile strengths and densities were determined. Foams were made of glass, metal-glass, glass-fiber, metal-glass-fiber, and fly ash. The microwave source used was a Litton model 1521 microwave oven which operated at 2.45 GHz and had an output of 700 watts.
Date: January 1, 1985
Creator: Meek, T.T.; Blake, R.D. & Gregory, T.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Innovative Methods for Inorganic Sample Preparation

Description: Procedures and guidelines are given for the dissolution of a variety of selected materials using fusion, microwave, and Parr bomb techniques. These materials include germanium glass, corium-concrete mixtures, and zeolites. Emphasis is placed on sample-preparation approaches that produce a single master solution suitable for complete multielement characterization of the sample. In addition, data are presented on the soil microwave digestion method approved by the Environmental Protection Agency … more
Date: April 1, 1992
Creator: Essling, A. M.; Huff, E. A. & Graczyk, D. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Innovative Methods for Inorganic Sample Preparation

Description: Procedures and guidelines are given for the dissolution of a variety of selected materials using fusion, microwave, and Parr bomb techniques. These materials include germanium glass, corium-concrete mixtures, and zeolites. Emphasis is placed on sample-preparation approaches that produce a single master solution suitable for complete multielement characterization of the sample. In addition, data are presented on the soil microwave digestion method approved by the Environmental Protection Agency … more
Date: April 1, 1992
Creator: Essling, A. M.; Huff, E. A. & Graczyk, D. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Uranium Recycle by Ion Exchange and Calcination - Summary of Design Development and Equipment Design

Description: Technical information for the process of recovery of uranium from uranyl nitrate hexahydrate solutions that was developed as part of the Onsite Uranium Recycle (OSUR) project conducted at the Savannah River Site in the 1980's is summarized. The process involves an ion-exchange process to load the uranyl species from solution onto a cation resin that is subsequently dried using a microwave oven, and then calcined using a rotary calciner to produce U{sub 3}O{sub 8} powder. The information in this… more
Date: October 31, 2005
Creator: Hathcock, D.J. & Duncan, A.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

INEXPENSIVE, OFF THE SHELF HYBRID MICROWAVE SYSTEM

Description: A hybrid-heating microwave oven provides the energy to heat small 10-gram samples of spent metal tritide storage bed material to release tenaciously held decay product {sup 3}He. Complete mass balance procedures require direct measurement of added or produced gases on a tritide bed, and over 1100 C is necessary to release deep trapped {sup 3}He. The decomposition of non-radioactive CaCO{sub 3} and the quantitative measurement of CO{sub 2} within 3% of stoichiometry demonstrate the capabilities … more
Date: June 21, 2007
Creator: Walters, T; Paul Burket, P & John Scogin, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mercury recovery results of microwave digested tritium facility pump oil

Description: This report is a follow up of work done earlier this year and recorded in document WSRC-RP-97-322. The scope of this document is to demonstrated the viability of digesting two non-radioactive Tritium facility pump oils, Welch Duoseal and Spindura, neat and spiked with low-level mercury to determine completeness of digestion and recoverability of mercury. As noted in document WSRC-RP-97-322 a microwave digestion methodology was developed with CEM`s ultimate digestion vessel system (UDV) and is t… more
Date: September 30, 1997
Creator: Whitaker, M.J. & Clymire, J.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Enhancement of thermal stability in microwave applicators by mismatching and detuning

Description: Many microwave applicator systems experiencing thermal runaway can be stabilized by mismatching and/or detuning the system. The stability of the systems is discussed qualitatively and a conservative guide for adjusting microwave applicators for enhanced stability is described.
Date: July 1996
Creator: Nelson, E. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Uniform bulk Material Processing using Multimode Microwave Radiation

Description: An apparatus for generating uniform heating in material contained in a cylindrical vessel is described. TE{sub 10}-mode microwave radiation is coupled into a cylindrical microwave transition such that microwave radiation having TE{sub 11}-, TE{sub 01}- and TM{sub 01}-cylindrical modes is excited therein. By adjusting the intensities of these modes, substantially uniform heating of materials contained in a cylindrical drum which is coupled to the microwave transition through a rotatable choke ca… more
Date: June 18, 1999
Creator: Varma, Ravi & Vaughan, Worth E.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Evaluation of microwave digestion systems for mercury recovery in an oil matrix

Description: The scope of this document is to characterize three microwave systems developed by CEM Corporation. The purpose of this investigative work was to evaluate the performance of each system for dissolution qualities and the recovery of mercury in an oil based matrix. The microwave systems evaluated were the heavy duty vessel system (HDV), the advanced composite system (ACV), and the open vessel system (OVS). All three systems have automated features, but all systems are limited by one factor or ano… more
Date: September 1, 1997
Creator: Whitaker, M.J. & Clymire, J.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fossil fuel and hydrocarbon conversion using hydrogen-rich plasmas. Topical report February 1994--February 1995

Description: Experiments were made on use of H and CH plasmas for converting waste materials and heavy oils to H-rich transportation fuels. Batch and continuous experiments were conducted with an industrial microwave generator and a commercial microwave oven. A continuously circulating reactor was constructed for conducting experiments on flowing oils. Experiments on decomposition of scrap tires showed that microwave plasmas can be used to decompose scrap tires into potentially useful liquid products. In a … more
Date: February 1, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen