Research explores how grape pests sniff out berries

Female grape berry moths are the biggest insect threat to wine grapes in the eastern U.S. The moths lay their eggs on grapes and, once hatched, the larvae penetrate the skin, then eat and damage the fruit. But no one is quite ...

Soil scientists determine how abandoned arable land recovers

Soil scientists from RUDN University have found that the rate of accumulation of organic carbon in wild, cultivated, and abandoned soils depends mainly on the type and composition of the soil, and, to a lesser extent, on ...

On the way to nanotheranostics

Theranostics is an emerging field of medicine whose name is a combination of "therapeutics" and "diagnostics." The idea behind theranostics is to combine drugs and/or techniques to simultaneously—or sequentially—diagnose ...

A simplified method to categorize olive oil

Olive oil classification is currently very costly and slow. In order to categorize oil into extra virgin (EVOO), virgin (VOO) and lampante olive oil (LOO), an offical method is used, consisting of a physicochemical analysis ...

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Chromatography

Chromatography (from Greek χρῶμα chroma "color" and γράφειν graphein "to write") is the collective term for a set of laboratory techniques for the separation of mixtures. The mixture is dissolved in a fluid called the "mobile phase", which carries it through a structure holding another material called the "stationary phase". The various constituents of the mixture travel at different speeds, causing them to separate. The separation is based on differential partitioning between the mobile and stationary phases. Subtle differences in a compound's partition coefficient result in differential retention on the stationary phase and thus changing the separation.

Chromatography may be preparative or analytical. The purpose of preparative chromatography is to separate the components of a mixture for further use (and is thus a form of purification). Analytical chromatography is done normally with smaller amounts of material and is for measuring the relative proportions of analytes in a mixture. The two are not mutually exclusive.

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