Encyclopedia > P > Parts-per notation
Parts-per notation
The "parts-per" notations are used to denote extremely low concentrations of chemical elements. Also known as mixing ratios, are often used to denote the relative abundance of trace elements in the Earth's crust, trace elements in forensics or other analyses, or levels of pollutants in the environment.
Information are taken from Wikipedia, the open encyclopedia, to which contribute many volunteers from around the whole world. Texts are available under the following conditions GNU Free Documentation License.
Encyklopedie (cz) Encyklopédia (sk) Enzyklopädie (de)