Low Density Solvent-Based Dispersive Liquid-Liquid Microextraction for the Determination of Synthetic Antioxidants in Beverages by High-Performance Liquid Chromatography
Figure 7
HPLC-UV chromatograms of antioxidants at the concentration levels of 50 and 250 ng mL−1 in mineral water (a) and cherry juice sample (b) before and after spiking. Extraction solvent volume (1-octanol), 90 L; dispersive solvent volume (methanol), 1 mL; pH, 6; ionic strength, 6% (NaCl, w/v); sample volume, 5 mL. Peak assignment: (1) TBHQ, (2) BHA, (3) BHT.
