Parts-per notation

The "parts-per" notations are used to denote low concentrations of chemical elements. Also known as mixing ratios, they are often used to denote the relative abundance of trace elements in the Earth's crust, trace elements in forensics or other analyses, dissolved minerals in water, or pollutants in the environment.

“Parts-per notation” is strongly related to:

Litre Percentage Dimensionless quantity Coefficient Names of large numbers Per mil International Union of Pure and Applied Physics International Committee for Weights and Measures Basis point International Bureau of Weights and Measures Quotient Coefficient of thermal expansion Long and short scales SI prefix National Institute of Standards and Technology Micrometre Million International Organization for Standardization International System of Units Engineering Metering pump Olympic-size swimming pool Temperature coefficient Centi- Phthalate Nano- Mole fraction Pico- Milli- Granularity Micro- Laser range-finder Volumetric flow rate Technical writing Curie Stepper motor Standards organization Accuracy and precision Strain (materials science) Proportionality (mathematics)

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