A novel and rapid ionic liquid-based dispersive liquid–liquid microextraction (IL-DLLME) method combined
with liquid chromatography and a fluorescence detector for the analysis of ochratoxin A in rice
wines is presented. The following parameters were systematically investigated: type and volume of ionic
liquid, volume of dispersive solvent, salt addition, sample pH, and vortex time. Rice wine samples were
first diluted to 18% alcohol with deionized water, and the pH was adjusted to 3.0. A DLLME procedure was
followed that included IL ([HMIM][PF6]) and ethanol as the extraction and dispersive solvents, respectively.
Under the optimized experimental conditions, good linearity was obtained with a correlation coefficient
(r) of 0.9998 and a limit of detection (LOD) of 0.04 lg L1. The recoveries ranged from 75.9% to
82.1% with an RSD below 10.4%. The proposed method was successfully applied to analyse OTA samples
from several rice wine brands collected in Guangdong province, China.
A novel and rapid ionic liquid-based dispersive liquid–liquid microextraction (IL-DLLME) method combinedwith liquid chromatography and a fluorescence detector for the analysis of ochratoxin A in ricewines is presented. The following parameters were systematically investigated: type and volume of ionicliquid, volume of dispersive solvent, salt addition, sample pH, and vortex time. Rice wine samples werefirst diluted to 18% alcohol with deionized water, and the pH was adjusted to 3.0. A DLLME procedure wasfollowed that included IL ([HMIM][PF6]) and ethanol as the extraction and dispersive solvents, respectively.Under the optimized experimental conditions, good linearity was obtained with a correlation coefficient(r) of 0.9998 and a limit of detection (LOD) of 0.04 lg L1. The recoveries ranged from 75.9% to82.1% with an RSD below 10.4%. The proposed method was successfully applied to analyse OTA samplesfrom several rice wine brands collected in Guangdong province, China.
การแปล กรุณารอสักครู่..
