Analysis conversion
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How to convert between 30 mg/l and ppm for batch analysis? For example, how to convert 50 mg/l of methanol to ppm?
Conversion between ppm and mg/m3: mg/m3 = M/22.4 × ppm × (273/(273+T)) × P/101325. Here, M is the molecular weight of the gas, T is the temperature, and P is the pressure. m is the mass of the gas (in mg)
This post was last edited by ylb913 on 2016-10-31 06:42 ——The units used here are a bit confusing. mg/l is commonly used for liquids; in the case of aqueous solutions, since their specific gravity is close to 1, one liter corresponds to one kilogram, so mg/l can be considered equivalent to ppm. The common unit for gases is milligrams per cubic meter, with one cubic meter corresponding to one kilogram.