Journal
ANALYTICA CHIMICA ACTA
Volume 804, Issue -, Pages 104-110Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2013.09.045
Keywords
Patulin; Apple juice; Enzyme assisted extraction; Ionic liquid based dispersive liquid liquid microextraction; High-performance liquid chromatography; Response surface methodology
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Funding
- National Nutrition & Food Technology Research Institute of Iran
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A simple and highly sensitive analytical methodology for isolation and determination of patulin in apple-juice samples, based on enzyme-assisted extraction (EAE) and ionic liquid-based dispersive liquid-liquid microextraction (IL-DLLME) was developed and optimized. Enzymes play essential roles in eliminating interference and increasing the extraction efficiency of patulin. Apple-juice samples were treated with pectinase and amylase. A mixture of 80 pi, ionic liquid and 600 pi, methanol (disperser solvent) was used for the IL-DLLME process. The sedimented phase was analyzed by high-performance liquid chromatography (HPLC). Experimental parameters controlling the performance of DLLME, were optimized using response surface methodology (RSM) based on central composite design (CCD). Under optimum conditions, the calibration curves showed high levels of linearity (R-2 > 0.99) for patulin in the range of 1-200 ng g(-1). The relative standard deviation (RSD) for the seven analyses was 7.5%. The limits of detection (LOD) and limits of quantification (LOQ) were 0.15 ng g(-1) and 0.5 ng g(-1), respectively. The merit figures, compared with other methods, showed that new proposed method is an accurate, precise and reliable sample-pretreatment method that substantially reduces sample matrix interference and gives very good enrichment factors and detection limits for investigation trace amount of patulin in apple-juice samples. (C) 2013 Elsevier B.V. All rights reserved.
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