Investigation of different pre-concentration methods for NMR analyses of Brazilian white wine

被引:16
作者
Amaral, FM [1 ]
Caro, MSB [1 ]
机构
[1] Univ Fed Santa Catarina, Anal Ctr, Chem Dept, BR-88040900 Florianopolis, SC, Brazil
关键词
Brazilian wine; pre-concentration methods; H-1 NMR analysis;
D O I
10.1016/j.foodchem.2004.09.039
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
This work describes the investigation of different preparation methods of wine samples such as direct analysis, freeze-drying and nitrogen-flow concentration in the characterization of Brazilian Chardonnay wine composition by means of (HNMR)-H-1 spectroscopy. The direct analyses of the wine presented some limitations for the detection of "minor" compounds and substances whose signals were expected in the region from 3.6 to 4.0 and 0.8 to 1.3 ppm. The freeze-dried sample showed that a low quantity of ethanol remained in the lyophilisate. The freeze-dried process also revealed restrictions concerning long-time consumption and reproductibility. Diminution of the ethanol signal was observed in the H-1 NMR spectrum of wine samples which were concentrated under nitrogen-flow to allow the determination of compounds such as butylenglycol and alanine. The nitrogen-flow shows advantages in the identification of compounds present as minor compounds with less time consumption. (c) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:507 / 510
页数:4
相关论文
共 10 条
  • [1] Ablett S., 1992, Trends in Food Science & Technology, V3, P246
  • [2] Application of quality control methods for assessing wine authenticity: Use of multivariate analysis (chemometrics)
    Arvanitoyannis, IS
    Katsota, MN
    Psarra, EP
    Soufleros, EH
    Kallithraka, S
    [J]. TRENDS IN FOOD SCIENCE & TECHNOLOGY, 1999, 10 (10) : 321 - 336
  • [3] Application of chemometrics to the 1H NMR spectra of apple juices:: discrimination between apple varieties
    Belton, PS
    Colquhoun, IJ
    Kemsley, EK
    Delgadillo, I
    Roma, P
    Dennis, MJ
    Sharman, M
    Holmes, E
    Nicholson, JK
    Spraul, M
    [J]. FOOD CHEMISTRY, 1998, 61 (1-2) : 207 - 213
  • [4] Use of high-field H-1 NMR spectroscopy for the analysis of liquid foods
    Belton, PS
    Delgadillo, I
    Holmes, E
    Nicholls, A
    Nicholson, JK
    Spraul, M
    [J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1996, 44 (06) : 1483 - 1487
  • [5] BRESCIA MA, 2001, ANAL CHIM ACTA, P1
  • [6] High-resolution nuclear magnetic resonance spectroscopy and multivariate analysis for the characterization of beer
    Duarte, I
    Barros, A
    Belton, PS
    Righelato, R
    Spraul, M
    Humpfer, E
    Gil, AM
    [J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2002, 50 (09) : 2475 - 2481
  • [7] Study of the compositional changes of mango during ripening by use of nuclear magnetic resonance spectroscopy
    Gil, AM
    Duarte, IF
    Delgadillo, I
    Colquhoun, IJ
    Casuscelli, F
    Humpfer, E
    Spraul, M
    [J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2000, 48 (05) : 1524 - 1536
  • [8] Use of modern nuclear magnetic resonance spectroscopy in wine analysis: determination of minor compounds
    Kosir, IJ
    Kidric, J
    [J]. ANALYTICA CHIMICA ACTA, 2002, 458 (01) : 77 - 84
  • [9] Identification of amino acids in wines by one- and two-dimensional nuclear magnetic resonance spectroscopy
    Kosir, IJ
    Kidric, J
    [J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2001, 49 (01) : 50 - 56
  • [10] Discrimination between orange juice and pulp wash by 1H nuclear magnetic resonance spectroscopy:: Identification of marker compounds
    Le Gall, G
    Puaud, M
    Colquhoun, IJ
    [J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2001, 49 (02) : 580 - 588