Alkyl polyglycosides solid

The first step is to preconcentrate and separate the material of interest from the matrix by solid-phase extraction. The solid-phase material used is hydro-phobic silica gel (octadecyltrichlorosilane derivative). After preconditioning with methanol, 0.1-1 L of sample solution is passed through the cartridge or empore disk. After rinsing with water, the adsorbed surfactant is eluted with methanol. Recovery is in the 95-100% range. In the extract, alkyl polyglycosides are determined by HPLC or GC methods identical to or comparable with those already described. 

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