摘要

Rhodamine B, Sudan I, and Sudan AT were used as model compounds to investigate the different separation characteristics of the filter paper modified by silica nanoparticles and silylation reagents. The effects of nanoparticles sizes, carbon chains length of silylation reagents and treated methods on the separation characteristics of modified filter paper were studied. The results showed that the paper modified by smaller size of silica nanoparticles and longer length of carbon chains owned better separation performance. The retention behavior of three pigments on the modified filter paper is similar with that of reversed-phase column chromatography.