Examples of gas liquid separators (50) include a chamber (52), a fluid mixture inlet (56), a gas outlet (62) and a liquid outlet (64). The fluid mixture inlet and the gas and liquid outlets are in fluid communication with the chamber. A fluid mixture received at the fluid mixture inlet diffuses inside the chamber and is separated into a liquid and a gas. The separated liquid is gravity-fed to the liquid outlet. In one embodiment the fluid mixture is conducted through piping (68), including a 90° elbow, to the fluid mixture inlet (56). Advantageously, the elbow can reduce the velocity of the fluid mixture before reaching the fluid mixture inlet (56). The gas liquid separators have reduced dispersion and increased liquid recovery in comparison to conventional gas liquid separators used for chromatographic separations. The reduced dispersion yields an improvement in the shape of chromatographic peaks.