IN several laboratories, where whole lipid extracts are chromatographed on silicic acid in chloroform-methanol, experience has suggested the need for continuous concave gradient elution. Devices are ...

Since the first high performance liquid chromatographs (HPLC) hit laboratories in the 1960s, refractive index (RI) detectors have enabled the discovery of testing materials that do not possess ...

Gradient elution involves a programmed change in mobile-phase composition over time, transitioning from weak to strong during a separation. Linear gradients, characterized by a constant change in ...