asymmetrical flow field-flow fractionation
Asymmetrical flow FFF (AFFFF or AF4) is a type of flow FFF using only one permeable wall which serves as accumulation wall. Experiments show that the asymmetrical design separates faster and more efficient than the symmetrical channel.
AFFFF is certainly one of the most universal FFF techniques. It features a very broad (105) separation range from 1 nm to 100 µm . And its application range covers both simple and complex macromaterials of biological, pharmaceutical, industrial and environmental relevance such as proteins, polymers or nanoparticles.
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