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The conversion between mg/mL, μg/mL, and ppm is essential in chemistry, pharmacology, and environmental science for expressing solution concentrations. Since 1 mg/mL equals 1000 μg/mL and also equals 1000 ppm (for aqueous solutions where density is approximately 1 g/mL), these units are directly convertible.
The calculator uses the conversion formula:
Where:
Explanation: This conversion is based on the metric system where 1 milligram = 1000 micrograms, and for dilute aqueous solutions, 1 mg/mL is approximately equal to 1000 ppm.
Details: Accurate concentration conversion is crucial for preparing solutions, dosing medications, conducting experiments, and complying with regulatory standards in various scientific and industrial fields.
Tips: Enter the concentration in mg/mL. The calculator will automatically convert to both μg/mL and ppm. All values must be valid (concentration > 0).
Q1: Why are μg/mL and ppm considered equivalent?
A: For aqueous solutions where the density is approximately 1 g/mL, 1 μg/mL equals 1 ppm because 1 μg per 1 mL is equivalent to 1 part per million by weight.
Q2: When is this conversion not accurate?
A: This conversion assumes the solution density is 1 g/mL. For solvents with significantly different densities, additional density correction is needed for accurate ppm conversion.
Q3: What's the difference between mg/mL and ppm?
A: mg/mL is mass per volume concentration, while ppm is mass per mass concentration (parts per million). They are numerically equal only when density is 1 g/mL.
Q4: How do I convert between different concentration units?
A: Use the relationship: 1 mg/mL = 1000 μg/mL = 1000 ppm (for water-based solutions). Multiply your mg/mL value by 1000 to get both μg/mL and ppm.
Q5: Are these conversions applicable to all types of solutions?
A: While the mg/mL to μg/mL conversion is always valid, the ppm conversion is specifically accurate for aqueous solutions. For other solvents, density must be considered.