Zhao, Ercheng Application of dispersive liquid-liquid microextraction for the analysis of organophosphorus pesticides in watermelon and cucumber. [electronic resource] - Journal of chromatography. A Dec 2007 - 137-40 p. digital Publication Type: Journal Article ISSN: 0021-9673 Standard No.: 10.1016/j.chroma.2007.10.069 doi Subjects--Topical Terms: Chemistry Techniques, Analytical--methodsChlorobenzenesCitrullus--chemistryCucumis sativus--chemistryOrganophosphorus Compounds--analysisPesticides--analysisSolventsWater