Abstract
In capillary column liquid chromatography, a cylindrical flow-through cell is often used in absorbance detection. The cross-sectional shape of the cylindrical flow-through cell perpendicular to the light beam is rectangular. Therefore, the optimum shape of the focused light beam is also rectangular. The use of a cylindrical lens to obtain a rectangular light beam, thus increasing the sensitivity of the UV detector more than 10-fold, is described.
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