gradient elution analysis

gradient elution analysis

[′grād·ē·ənt i′lü·shən ə‚nal·ə·səs]
(analytical chemistry)
A form of gas-liquid chromatography in which the eluting solvent is changed with time, either by gradually mixing a second solvent of greater eluting power with the first, less powerful solvent, or by a gradual change in pH or other property.