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Fractionation makes it possible to isolate more than two components in a mixture in a single run. This property sets it apart from other separation techniques. Fractionation is widely employed in many branches of science and technology. Mixtures of liquids and gasses are separated by fractional distillation by difference in boiling point.
AF4 and other FFF methods have been extensively used in environmental research on the impact of nano materials [2] and to characterize condensed tannins oxidation. [3] For high molar mass and branched polymers, AF4 has been shown to achieve good separation, whereas SEC fails, [4] and AF4 has been applied to polyolefines at temperatures above ...
In chemistry, fractional crystallization is a stage-wise separation technique that relies on the liquid–solid phase change. This technique fractionates via differences in crystallization temperature and enables the purification of multi-component mixtures, as long as none of the constituents can act as solvents to the others.
Analytical Methods is a monthly peer-reviewed scientific journal covering research on the development of analytical techniques. It is published by the Royal Society of Chemistry and the editor-in-chief is Scott Martin ( Saint Louis University ).
The following is an empirically determined equation for estimating the D/H fractionation factor: 1000 In α kaolinite-water = −2.2 × 10 6 × T −2 − 7.7. [ 98 ] The δDs vs. ‰SMOW for hydrogen minerals found in mantle , metamorphic rock, shales , marine clays , marine carbonates and sedimentary rocks are shown in the table.
In most cases the fractionation of polymers on a preparative scale is based on chromatographic methods (e.g. preparative SEC or Baker-Williams fractionation).Therefore, the production is normally limited to few grams only.
Accounts of Chemical Research is a semi-monthly peer-reviewed scientific journal published by the American Chemical Society containing overviews of basic research and applications in chemistry and biochemistry. It was established in 1968 and the editor-in-chief is Cynthia J. Burrows (University of Utah). [1]
The journal has absorbed two other publications in its history, the Journal of Analytical and Applied Chemistry (July 1893) and the American Chemical Journal (January 1914). It covers all fields of chemistry. Since 2021, the editor-in-chief is Erick M. Carreira . [2] In 2014, the journal moved to a hybrid open access publishing model.