pure substance


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Related to pure substance: Homogeneous mixture

pure substance

[′pyu̇r ′səb·stəns]
(chemistry)
A sample of matter, either an element or a compound, that consists of only one component with definite physical and chemical properties and a definite composition.
References in periodicals archive ?
Model the particle structure of pure substances such as graphite, diamond, salt (sodium chloride) to understand that different solids have different particle structures and that these structure differences explain how hard or soft a solid is.
Lancaster will unveil a new look in the first quarter and seven new sun care products featuring complex Radical Protection Factor (RPF) with botanical extracts and pure substances to neutralize free radicals and protect the skin from cell damage and photoaging.
Because of differences in the way molecules stick to the column, mixtures become separated into their individual components and can be analysed further as pure substances.
The authors consider various methods of experimental study of thermal and calorie properties of pure substances and binary mixtures in wide ranges of variation of independent variables, including the near-critical region.
The published literature reports only tests with very large amounts of pure substances.
When you start dealing with mixtures, most of what we're saying about pure substances doesn't hold up," Shallenberger says.
Thermal Properties of Pure Substances and Some Applications