STUDY ON SORPTION ABILITY OF CHLOROPHYLL BY MnO2 AND ITS APPLICATION FOR CLEANING-UP PURPOSE TOWARD DETERMINATION OF CARBAMATE PESTICIDE RESIDUE IN VEGETABLE BY HIGH-PERFORMANCE LIQIUD CHROMATOGRAPHY (HPLC)
Lê Ngọc Chung
Nguyễn Đức Thuận
Trần Thị Thi Thơ
Trương Đông Phương
Đinh Văn Phúc
Abstract
Solid phase extraction with MnO2 sorbent was applied to separate and pre-concentrate carbamate pesticide residue in the vegetable samples. The method are based a simple extraction with CH2Cl2 as organic solvent, a purification with solid phase extraction clean-up, and determination of carbamate pesticide residue with high-performance liquid chromatography. A range of carbamate pesticides (carbaryl, carbofuran, fenobucarb, pirimicarb) was analyzed in the vegetable samples.