Extraction of matrine from soil with matrix solid-phase dispersion by molecularly imprinted polymers derived from...

Molecularly imprinted polymers prepared by Pickering emulsion method with lignin as stable particle were used as dispersants in matrix solid-phase dispersion, followed by ultra high performance liquid chromatography with tandem mass spectrometry to research the degradation behavior of matrine in soil. The molecularly imprinted polymers have regular morphology and uniform particles. Moreover, the adsorption experiments and the conditions of matrix solid-phase dispersion were discussed. With the optimal conditions of matrix solid-phase dispersion, the recoveries of matrine were 95.4-98.2%, relative standard deviations were 0.6-5.1%, and the detection limit was 5 ng/g. Moreover, the degradation behavior of matrine in soil was researched, it indicated the half-life of matrine was 2.7-3.2 days, and it was an environmentally friendly botanical pesticide. The method was successfully applied to separate and analyze matrine in soil samples can decrease analysis time, save organic solvents, and improve the selectivity.