Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Evaluation of a Field-portable Fluorescence Method for the Measurement of Trace Amounts of Beryllium in the Workplace
Author: Interlaboratory Evaluation of a Portable Fluorescence Method for the Measurement of Trace Beryllium in the Workplace
Author: K. AshleyPublisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 8
Book Description
Researchers at Los Alamos National Laboratory (LANL) developed a field-portable fluorescence method for the measurement of trace beryllium in workplace samples such as surface dust and air filters. The technology has been privately licensed and is commercially available. In cooperation with the Analytical Subcommittee of the Beryllium Health and Safety Committee, we have carried out a collaborative interlaboratory evaluation of the LANL field-portable fluorescence method. The interlaboratory study was conducted for the purpose of providing performance data that can be used to support standard methods. Mixed cellulose ester (MCE) membrane filters and Whatman 541 filters were spiked with beryllium standard solutions so that the filters spanned the range ?0.05 - ?0.5 ?g Be per sample. Sets of these filters were then coded (to ensure blind analysis) and sent to participating laboratories, where they were analyzed. Analysis consisted of the following steps: 1. Removal of the filters from transport cassettes and placement of them into 15-mL centrifuge tubes; 2. mechanically-assisted extraction of the filters in 5 mL of 1 % ammonium bifluoride solution (aqueous) for 30 min; 3.-4. filtration and transfer of sample extract aliquots (100 ?L) into fluorescence cuvettes; 5. introduction of 1.9 mL of detection solution (to effect reaction of the fluorescence reagent with beryllium in the extracted sample); and 6. measurement of fluorescence at ?75 nm using a portable fluorometer. This work presents performance data in support of a procedure that is targeted for publication as a National Institute for Occupational Safety and Health (NIOSH) method and as an ASTM International standard.
Determination of Small Amounts of Beryllium by Fluorescence Measurement
Author: A. B. CarlsonPublisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 18
Book Description
Field Test for Beryllium Minerals
Author: Thomas Newkirk McVayPublisher:
ISBN:
Category : Beryllium ores
Languages : en
Pages : 18
Book Description
A Review of Analytical Methods for Beryllium
Author: William F. NeumanPublisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 10
Book Description
The Spectrographic Detection of Trace Impurities in Beryllium Oxide
Author: Owen P. KilleenPublisher:
ISBN:
Category : Beryllium oxide
Languages : en
Pages : 30
Book Description
Standard Test Method for Determination of Beryllium in the Workplace Using Field-Based Extraction and Optical Fluorescence Detection
Author: Luminescence Measurement of the Roentgen Dosage Field of a Beryllium Window Tube
Author: Benedict CassenPublisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 16
Book Description
Beryllium
Author: Kevin AshleyPublisher: ASTM International
ISBN: 0803134991
Category : Alkaline earth metals
Languages : en
Pages : 115
Book Description
Method for the Spectrochemical Determination of Beryllium, Cadmium, Zinc, and Indium in Ore Samples
Author: Graham Wallace MarksPublisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 68
Book Description