Although respirable silica has been regulated for decades, the Occupational Health and Safety Administration (OSHA) put new guidelines into place in 2016, updating the existing 1971 rules.
Across most industries, the new PEL level is 50 µg/m3 over an eight-hour shift, with an action level of 25 µg/m3.
Our AIHA accredited laboratory provides sampling media (including pre-weighed filters) for respirable crystalline silica, then utilizes NIOSH 7500 with X-ray Diffraction (XRD) to provide accurate, definitive measurements. XRD provides insight into other materials in the sample that may prevent accurate analysis, known as interference. This includes identification of mica, feldspar, graphite, and more. Our experts also use the ICDD database to provide information on the thousands of known diffraction patterns that identify the interfering materials.
RJ Lee Group’s laboratory uses the clean plasma ashing method, eliminating the filter without leaving ash or other residues in the sample for testing. Plasma ashing has been verified to provide superior overall silica recovery when compared to the muffle furnace ashing method.
We offer two types of Respirable Crystalline Silica analysis:
Analysis down to 5 micrograms per filter
NEW Enhanced Analysis:
Analysis down to 2.5 micrograms per filter, the lowest available reporting limit
Our scientific experts can also help your organization interpret the analytical results. In addition, we offer determination of crystalline silica for bulk samples, along with full profile identification and quantitation using Rietveld XRD analysis for bulk samples. RJ Lee Group is offering Respirable Silica air sample results with a turnaround time of 5 working days. To learn more, please call us at 1.800.860.1776, extension 4, then 2, or click below.