Glossary:Ppm
Part(s) per million. A measure of concentration of a substance in a solid, liquid, or gas. In solids ppm equates to milligrams per kilogram (mg/kg) and in liquids to milligrams per liter (mg/L).
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Part(s) per million. A measure of concentration of a substance in a solid, liquid, or gas. In solids ppm equates to milligrams per kilogram (mg/kg) and in liquids to milligrams per liter (mg/L).