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Measurement of ultra-trace beryllium in occupational hygiene samples by extraction and fluorescence detection.

Authors
Ashley-K
Source
J Chem Health Saf 2011 Sep-Oct; 18(5):26-33
NIOSHTIC No.
20039619
Abstract
Beryllium is widely used in industry and commercial products for its unique properties; however, occupational exposure to beryllium particles can cause dermal sensitization and a potentially fatal lung ailment, chronic beryllium disease (CBD). Consequently, exposure limits for beryllium particles in air and action levels on surfaces have been established in efforts to minimize exposure risks for workers. In recent research, a molecular fluorescence method for the determination of trace beryllium in workplace samples, i.e., air filters and dust wipes, was evaluated and validated through intra- and inter-laboratory testing. The procedure entails extraction of sampled beryllium in dilute ammonium bifluoride (aqueous), followed by fluorescence measurement of the complex formed between beryllium and hydroxybenzoquinoline sulfonate (HBQS). The estimated method detection limit is <1 ng Be per air filter or wipe sample, with a dynamic range up to greater than 10 g per sample. Interferences from numerous metals tested (in >400-fold excess concentration compared to that of beryllium) are negligible or minimal. The procedure is effective for the dissolution and quantitative determination of beryllium extracted from refractory beryllium oxide particles, and was successfully modified for measuring beryllium content in large BeO particles and in soil samples. The method performance compares favorably with methods employing sample digestion in acid mixtures that include hydrofluoric acid, followed by inductively coupled plasma-mass spectrometry. ASTM International voluntary consensus standards and US National Institute for Occupational Safety and Health methods based on the methodology have been promulgated.
Keywords
Airborne-particles; Air-contamination; Biohazards; Exposure-assessment; Indoor-air-pollution; Laboratory-testing; Particle-aerodynamics; Particulate-dust; Particulates; Quantitative-analysis; Risk-analysis; Sampling; Sampling-methods; Statistical-analysis; Analytical-processes
Contact
Kevin Ashley, Ph.D., Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Mail Stop R-7, Cincinnati, OH 45226-1998
CODEN
CHLSEG
CAS No.
7440-41-7
Publication Date
20110901
Document Type
Journal Article
Email Address
KAshley@cdc.gov
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Identifying No.
B09282011
Issue of Publication
5
ISSN
1871-5532
NIOSH Division
DART
Source Name
Journal of Chemical Health and Safety
State
OH
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