Can I sample crystalline silica using low-ash 0.4-micron pore size AA (MCEF) filters instead of low-ash PVC filters?
Generally speaking, no. The weights of MCEF filters are affected greatly by slight variations in humidity and are not suitable for the gravimetric portion of the analysis of respirable dusts containing crystalline silica. Additionally, MCEF filters do not dissolve properly in THF and therefore the crystalline silica collected on MCEF cannot be readily analyzed by OSHA method ID-142.
Related Questions
- Can I sample crystalline silica using low-ash 0.4-micron pore size AA (MCEF) filters instead of low-ash PVC filters?
- How do I perform a crystalline silica mixture calculation when the sample contains both quartz and cristobalite?
- Is there a relationship between sample size and sample representativeness?
