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Mining Publication: Respirable Size-Selective Sampler for End-of-Shift Quartz Measurement: Development and Performance
Keywords: FTIR Respirable dust Silica dust
Original creation date: May 2017
Authors: T Lee, L Lee, E Cauda, JA Hummer, M Harper
Peer Reviewed Journal Article - May 2017
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NIOSHTIC2 Number: 20048860
J Occup Environ Hyg 2017 May; 14(5):335-342
Aims of this study were to develop a respirable size-selective sampler for direct-on-filter (DoF) quartz measurement at the end-of-shift (EoS) using a portable Fourier transform infrared (FTIR) spectrometer and to determine its size-selective sampling performance. A new miniaturized sampler has been designed to have an effective particle deposition diameter close to the portable FTIR beam diameter (6-mm). The new sampler (named the EoS cyclone) was constructed using a 3 dimensional printer. The sampling efficiency of the EoS cyclone was determined using polydisperse glass sphere particles and a time-of-flight direct reading instrument. Respirable dust mass concentration and quartz absorbance levels of samples collected with the EoS cyclone were compared to those collected with the 10-mm nylon cyclone. The EoS cyclone operated at a flow rate of 1.2 1 min-1 showed minimum bias compared to the international standard respirable convention. The use of the EoS cyclone induced respirable dust mass concentration results similar but significantly larger (5%) than those obtained from samples collected with 10-mm nylon cyclones. The sensitivity of the DoF-FTIR analysis in estimating quartz was found increased more than 10 times when the samples were collected with the EoS cyclone. The average particle deposition diameter was 8.8 mm in sixty samples. The newly developed user friendly EoS cyclone may provide a better sampling strategy in quartz exposure assessment with faster feedback.
Cover image for Respirable Size-Selective Sampler for End-of-Shift Quartz Measurement: Development and PerformancePeer Reviewed Journal Article - May 2017
Go to Web Page
NIOSHTIC2 Number: 20048860
J Occup Environ Hyg 2017 May; 14(5):335-342
See Also
A Comparison of Respirable Crystalline Silica Concentration Measurements Using a Direct-on-filter Fourier Transform Infrared (FT-IR) Transmission Method vs. a Traditional Laboratory X-ray Diffraction Method
Control of Respirable Dust
Direct-on-Filter alpha-Quartz Estimation in Respirable Coal Mine Dust using Transmission Fourier Transform Infrared Spectrometry and Partial Least Squares Regression
Direct-on-filter Analysis for Respirable Crystalline Silica Using a Portable FTIR Instrument
The Effects of Low Quartz Mass Loading and Spatial Variability on the Quartz Analysis of Surface Coal Mine Dust Samples
Evaluating Portable Infrared Spectrometers for Measuring the Silica Content of Coal Dust
Evaluating the Use of a Field-based Silica Monitoring Approach with Dust from Copper Mines
Improving Silica Dust Control Through Targeted Research
Laboratory Evaluation of a Canopy Air Curtain for Controlling Occupational Exposures of Roof Bolters
Research Toward Direct Analysis of Quartz Dust on Filters Using FTIR Spectroscopy
Page last reviewed: May 9, 2017
Page last updated: May 9, 2017
Content source: National Institute for Occupational Safety and Health, Mining Program
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