PPM stands for which measurement?

PPM stands for which measurement?

• A. Parts Per Billion
• B. Resource Conservation and Recovery Act
• C. Parts Per Million
• D. Atomic Absorption Spectronomy

Answer: (C)

PPM is a unit of concentration describing how much of a substance is present per one million parts of the sample. It’s used for very small amounts, and in water-related contexts, 1 mg/L is effectively the same as 1 ppm because water’s density is close to 1 g/mL. The other options don’t fit as a measurement unit: parts per billion is a smaller unit, the Resource Conservation and Recovery Act is a waste-management law, and atomic absorption spectrometry is a measurement technique, not a unit.

PPM is a unit of concentration describing how much of a substance is present per one million parts of the sample. It’s used for very small amounts, and in water-related contexts, 1 mg/L is effectively the same as 1 ppm because water’s density is close to 1 g/mL. The other options don’t fit as a measurement unit: parts per billion is a smaller unit, the Resource Conservation and Recovery Act is a waste-management law, and atomic absorption spectrometry is a measurement technique, not a unit.