Evaporative light scattering detector evaporation chamber

A diagram of the sensor of the evaporative light scattering detector manufactured by Polymer Laboratories is shown in figure 8. The eluent is atomized in a stream of nitrogen and the finely divided spray passes down a heated chamber to evaporate the solvent. The removal of the solvent converts the stream of droplets into a stream of particles... 

Another evaporative on-line detector is the evaporative light-scattering detector (ELSD) (97,104-107). In the ELSD, the eluant is nebulized with an inert gas to form an aerosol. The solvent in the dispersed eluant droplets is evaporated and removed in a heated chamber. The resulting solute particles fall through a light-scattering detector. The scattered light is related to the amount of mass in the particles, which in turn corresponds to the amount of solute in the eluant. 

The evaporative light scattering detector works by measuring the light scattered from the particles remaining after the eluent solvent has been nebuhzed and evaporated. The eluent solvent enters the detector and is evaporated in a heated device. As chromatographic peaks are eluted from the column and enter the detector the solvent is evaporated away. Conditions are selected so that the sample peak molecules become particulate. These particles enter a chamber into which a... 

Evaporative light scattering detection can be used as universal detector for liquid chromatography. Its opera-5 tion includes the nebulization of the eluent in th nebulizer, solvent evaporation in the drift tube, and scattered light detection at the light scattering chamber S Experimental conditions which can be adjusted in mos ELSD systems to optimize the detector sensitivity are th nebulizer gas flow rate, mobile phase flow rate, and drifts tube temperature. The detector response is nonlinear, butS... 

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