What Does PPHM Stand For?

PPHM stands for Parts Per Hundred Million

PPHM, or Parts Per Hundred Million, is a unit of measurement used to quantify the concentration of a substance in a given medium, typically expressed as the number of parts of a particular substance per one hundred million parts of the total mixture. This metric is commonly employed in environmental science, chemistry, and toxicology to assess pollutants, trace elements, and other minute concentrations, allowing for precise comparisons and analysis in various applications.