title: Determination of fungicides in fruit juice by ultrasound-assisted dispersive liquid-liquid microextraction based on solidification of floating organic solvent droplets followed by high performance liquid chromatography.
abstract: Ultrasound-assisted dispersive liquid-liquid microextraction (UA-DLLME) based on solidification of the floating organic solvent droplets (SFO) combined with HPLC was used for determination of five fungicides in fruit juice samples. 1-Dodecanol, which has a low density and low toxicity, was used as the extraction solvent in UA-DLLME. The solidification of floating organic droplets facilitates the transfer of analytes from the aqueous phase to the organic phase. This method was easy, quick, inexpensive, precise, and linear over a wide range. Under the optimized conditions, the enrichment factors for a 5 mL fruit juice sample were 25 to 56, and the LODs for the five fungicides ranged from 5 to 50 microg/L. The average recoveries ranged from 71.8 to 118.2% with RSDs of 0.9 to 13.9%. Application of the DLLME-SFO technique allows successful separation and preconcentration of the fungicides at a low concentration level in fruit juice samples.
authors.forename: Run-Zhen
authors.initials: RZ
authors.lastname: Fan
authors.forename: Congyun
authors.initials: C
authors.lastname: Liu
authors.forename: Wenqing
authors.initials: W
authors.lastname: Jiang
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Wang
authors.forename: Fengmao
authors.initials: F
authors.lastname: Liu
mesh_terms: D001628:Beverages / Q000032:analysis*; D002853:Chromatography, Liquid / Q000379:methods*; D005638:Fruit / Q000737:chemistry*; D005659:Fungicides, Industrial / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D059627:Liquid Phase Microextraction / Q000379:methods*; D010573:Pesticide Residues / Q000737:chemistry*; D012997:Solvents
chemical_list: D005659:Fungicides, Industrial; D010573:Pesticide Residues; D012997:Solvents