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Podcast: The Occupational Safety Leadership Podcast
Episode: Episode 40 - Converting Parts Per Million (PPM) to mg-M3 in an air sample
Description: Episode 40 focuses on the reverse conversion of what was covered in Episode 39. Dr. Ayers explains how to convert PPM (a volumeābased concentration) into mg/mĀ³ (a massāperāvolume concentration) for air sampling and exposure assessment.
This conversion is essential when comparing monitoring results to OSHA or ACGIH exposure limits, which may be listed in different units depending on the chemical.
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š Key Concepts Covered
1. Why PPM and mg/mĀ³ Are Not Interchangeable
PPM = parts of contaminant per million parts of air (volume/volume)
mg/mĀ³ = milligrams of contaminant per cubic meter of air (mass/vol...