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Direct-on-filter analysis of crystalline silica using photoacoustic fourier transform-infared spectroscopy.

Authors
Schwerha-DJ; Orr-C; Chen-BT; Soderholm-SC
Source
Anal Chim Acta 2002 Apr; 457(2):257-264
NIOSHTIC No.
20022854
Abstract
Photoacoustic Fourier transform-infrared spectroscopy (PA-FT-IR) has been used to perform direct-on-filter (DOF) analysis of crystalline silica using laboratory-generated filter samples. With these samples, the silica particles were embedded in the stable three-dimensional matrix of the filter. In this preliminary study, it was demonstrated that the photoacoustic (PA) signals generated from direct-on-filter measurements were significantly higher than the corresponding signals for equivalent amounts of silica particles placed directly in the photoacoustic detector cup. Studies with Min-U-Sil-5 loaded onto 9 mm filter stubs indicated a limit of detection of less than 10 g. Additionally, Teflon filters were demonstrated to be more suitable for these measurements than other types. The photoacoustic FT-IR approach seems to be feasible for further development to use with full-sized
Keywords
Silica-dusts; Silicates; Samplers; Sampling-methods; Spectrographic-analysis; Spectroscopes
CODEN
ACACAM
CAS No.
14808-60-7
Publication Date
20020401
Document Type
Journal Article
Email Address
corr@cdc.gov
Fiscal Year
2002
NTIS Accession No.
NTIS Price
Issue of Publication
2
ISSN
0003-2670
NIOSH Division
HELD
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Analytica Chimica Acta
State
WV
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