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Interlaboratory evaluation of a portable fluorescence method for the measurement of trace beryllium in the workplace.

Authors
Ashley-K; McCleskey-T; Brisson-M; Goodyear-G; Cronin-J; Agrawal-A
Source
J ASTM Int 2005 Oct; 2(9):JAI13156
NIOSHTIC No.
20028907
Abstract
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 approximately 0.05 - 0.5 micrograms 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 microgramsL) 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 approximately 475 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.
Keywords
Beryllium-compounds; Sampling-methods; Analytical-methods; Standards; Work-environment; Aerosols; Laboratories; Laboratory-techniques; Sampling
Contact
National Institute for Occupational Safety and Health, Division of Applied Research and Technology, Mail Stop R-7, 4676 Columbia Parkway, Cincinnati, OH45226
CODEN
JAIOAD
CAS No.
7440-41-7
Publication Date
20051001
Document Type
Journal Article
Email Address
KAshley@cdc.gov
Fiscal Year
2006
NTIS Accession No.
NTIS Price
Issue of Publication
9
ISSN
1546-962X
NIOSH Division
DART
Source Name
Journal of ASTM International
State
OH; SC; NM; AZ
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