Premium
Analysis of anthocyanins in commercial fruit juices by using nano‐liquid chromatography‐electrospray‐mass spectrometry and high‐performance liquid chromatography with UV‐vis detector
Author(s) -
Fanali Chiara,
Dugo Laura,
D'Orazio Giovanni,
Lirangi Melania,
Dachà Marina,
Dugo Paola,
Mondello Luigi
Publication year - 2011
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201000665
Subject(s) - chromatography , chemistry , high performance liquid chromatography , mass spectrometry , electrospray , calibration curve , analyte , quantitative analysis (chemistry) , detection limit
Abstract Nano‐LC and conventional HPLC techniques were applied for the analysis of anthocyanins present in commercial fruit juices using a capillary column of 100 μm id and a 2.1 mm id narrow‐bore C 18 column. Analytes were detected by UV‐Vis at 518 nm and ESI‐ion trap MS with HPLC and nano‐LC, respectively. Commercial blueberry juice (14 anthocyanins detected) was used to optimize chromatographic separation of analytes and other analysis parameters. Qualitative identification of anthocyanins was performed by comparing the recorded mass spectral data with those of published papers. The use of the same mobile phase composition in both techniques revealed that the miniaturized method exhibited shorter analysis time and higher sensitivity than narrow‐bore chromatography. Good intra‐day and day‐to‐day precision of retention time was obtained in both methods with values of RSD less than 3.4 and 0.8% for nano‐LC and HPLC, respectively. Quantitative analysis was performed by external standard curve calibration of cyanidin‐3‐ O ‐glucoside standard. Calibration curves were linear in the concentration ranges studied, 0.1–50 and 6–50 μg/mL for HPLC‐UV/Vis and nano‐LC‐MS, respectively. LOD and LOQ values were good for both methods. In addition to commercial blueberry juice, qualitative and quantitative analysis of other juices ( e.g. raspberry, sweet cherry and pomegranate) was performed. The optimized nano‐LC‐MS method allowed an easy and selective identification and quantification of anthocyanins in commercial fruit juices; it offered good results, shorter analysis time and reduced mobile phase volume with respect to narrow‐bore HPLC.