Document Detail

Semiautomatic flow-injection method for determination of volatile acidity in wines.
MedLine Citation:
PMID:  11767154     Owner:  NLM     Status:  MEDLINE    
A flow-injection (FI) method based on analytical pervaporation was assessed for its routine use in the determination of volatile acidity in winery laboratories. The new method was compared with both the official method and the Mathieu method, which is most often used in Spanish wineries, by testing 30 different wines, including young and aged, and sweet and dry wines from Montilla-Moriles appellation d'origine. The robustness of the new method was established, and then all 3 methods were studied in terms of range of linearity and regression of the calibration curve, repeatability, reproducibility, sensitivity, detection and quantitation limits (LOD and LOQ, respectively), and time of analysis. The FI method surpassed the Mathieu method in reproducibility and both the Mathieu and official methods in LOD and LOQ and sensitivity; it also required less personnel involvement and shorter analysis time. The statistical criteria established by the Office International de la Vigne et du Vin were applied to the data and the results obtained indicated that the differences between the analytical parameters of the 3 methods are not significant and can be applied indistinctly. The correlation of the methods was studied by taking them 2 by 2, and the corresponding equations, coefficients, and deviations confirmed the statistical results. Thus, the new method can be used in winery laboratories with clear advantages over its 2 counterparts (the routine and official methods).
J González-Rodríguez; P Pérez-Juan; M D Luque de Castro
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of AOAC International     Volume:  84     ISSN:  1060-3271     ISO Abbreviation:  J AOAC Int     Publication Date:    2001 Nov-Dec
Date Detail:
Created Date:  2001-12-19     Completed Date:  2002-06-10     Revised Date:  2008-03-17    
Medline Journal Info:
Nlm Unique ID:  9215446     Medline TA:  J AOAC Int     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1846-50     Citation Subset:  IM    
R&D Department Pérez Barquero, Montilla, Córdoba, Spain.
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MeSH Terms
Flow Injection Analysis / instrumentation,  methods*,  standards,  statistics & numerical data
Food Analysis / instrumentation,  methods*,  standards,  statistics & numerical data
Hydrogen-Ion Concentration
Reference Standards
Wine / analysis*,  standards

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