ULTRASOUND-ASSISTED EMULSIFICATION MICROEXTRACTION OF VARIOUS PRESERVATIVES FROM COSMETICS, BEVERAGES, AND WATER SAMPLES
作者： Yadollah Yamini , Abolfazl Saleh , Mohammad Rezaee , Leila Ranjbar , Morteza Moradi
DOI: 10.1080/10826076.2011.637272
关键词:
摘要: In the present work, an efficient method based on ultrasound-assisted emulsification microextraction was developed for determination of sodium benzoate (SB), p-hydroxybenzoic acid (PHBA), methyl-paraben (MP), ethyl-paraben (EP), and propyl-paraben (PP) in different samples. this procedure, 40 μL (5% w/v) aliquot 336 1-octanol injected slowly into a 12-mL home-designed centrifuge glass vial containing aqueous sample analytes that located inside ultrasonic water bath. The formed emulsion centrifuged separated organic solvent then 20-μL loop high performance liquid chromatography coupled with UV detector. Under optimum conditions, preconcentration factors (PFs) range 109–490 were obtained. proposed studied terms its linear (LR, 0.6 μg/L up to 10000 μg/L), linearity (R2 ≥ 0.9963), precision [RSD% ≤ 3.6; reproducibility, RSD (%) ≤ 9.8] extraction recoveries (22.6–102.1%). Limits...
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