![]() The reverse can be done to convert ppm into %.Įxposure calculations are necessary to determine the dose of a toxicant an animal has potentially ingested and whether decontamination interventions (e.g., emetics, activated charcoal, etc.) are needed or other possible treatments likely to be needed. ![]() One rule of thumb is to move the decimal point four places to the right to convert percentage to ppm (e.g., 0.04% = 400 ppm 2.5% = 25,000 ppm). One % equals 1 gram in 100 grams for solids or 1 g/100 mL for liquids. The concentration unit ppb is the same as micrograms/kg or micrograms/L. If mg/kg or mg/L are divided by 1000 the equivalent units would be micrograms/g or micrograms/mL, respectively. The concentration unit ppm is equivalent to mg/kg for solids or mg/L for liquids. Concentration units representing the proportion of toxicant in the total product are common and include %, milligram percentage (mg%), parts per million (ppm), parts per billion (ppb), etc. ![]() If expressed in a solid, the concentrations are typically expressed as a weight per weight (micrograms/mg, micrograms/Kg, mg/Kg, mg/g). If in a liquid, the concentration units are typically expressed as a weight per volume (e.g., microgram/mL, microgram/L, mg/L, mg/dL, mg/mL). Units of concentration can refer to a concentration in a liquid or solid material.
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