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Size-selective poorly soluble particulate reference materials for evaluation of quantitative analytical methods.

Authors
Stefaniak-AB; Turk-GC; Dickerson-RM; Hoover-MD
Source
Anal Bioanal Chem 2008 Jul; 391(6):2071-2077
NIOSHTIC No.
20034124
Abstract
Owing to the absence of readily available certified particulate reference materials (RMs), most analytical methods used to determine particulate contaminant levels in workplace or other environments are validated using solution RMs, which do not assess the robustness of the digestion step for all forms and sizes of particles in a sample. A library of particulate RMs having a range of chemical forms and particle sizes is needed to support a shift in method evaluation strategies to include both solution and particulate RMs. In support of creating this library, we characterized bulk and physically size separated fractions of beryllium oxide (BeO) particles recovered from the machining fluid sludge of an industrial ceramic products grinding operation. Particles were large agglomerates of compact, crystalline BeO primary particles having diameters on the order of several micrometers. As expected, the particle surface area was independent of sieve size, with a range from 3.61 m2/g (53-63-Ám fraction) to 4.82 m2/g (355-600-Ám fraction). The density was near the theoretical value (3.01 g/cm3). The data support more detailed characterization of the sludge materials for use as size-selective RMs. This work illustrates an approach that can be used to develop RMs that are difficult to digest.
Keywords
Particle-counters; Particulate-sampling-methods; Particulates; Chemical-hypersensitivity; Chemical-properties; Chemical-structure; Work-environment; Workplace-monitoring; Workplace-studies; Dust-analysis; Dust-collection; Dust-counting; Dust-exposure; Dust-measurement; Dust-sampling
Contact
Aleksandr B. Stefaniak, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, 1095 Willowdate Road, Morgantown, WV 26505
CODEN
ABCNBP
CAS No.
1034-56-9
Publication Date
20080701
Document Type
Journal Article
Email Address
astefaniak@cdc.gov
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Issue of Publication
6
ISSN
1618-2642
NIOSH Division
DRDS
Source Name
Analytical and Bioanalytical Chemistry
State
WV; MD; NM
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