Memorial University DAI: Trace element fingerprinting of Canadian wines

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Document Description

Title	Trace element fingerprinting of Canadian wines
Author	Taylor, Vivien, 1974-
Description	Thesis (M.Sc.)--Memorial University of Newfoundland, 2001. Environmental Science
Date	2001
Pagination	1 v. (various foliations) : ill. (some col.), maps
Subject	Trace elements--Analysis; Trace elements--Spectra; Wine and wine making--Ontario--Niagara Peninsula--Analysis; Wine and wine making--British Columbia--Okanogan Valley--Analysis
Degree	M.Sc.
Degree Grantor	Memorial University of Newfoundland. Dept. of Environmental Science
Discipline	Environmental Science
Language	eng
Spatial Coverage	Canada--Ontario--Niagra Peninsula Canada--British Columbia--Okanogan Valley
Notes	Includes bibliographical references.
Abstract	Wines from Canada's two major wine grape growing regions, the Niagara Peninsula, Ontario and the Okanagan Valley, British Columbia, were fingerprinted with 100% correct classification, using the elements Al, V, Mn, Co, Zn, Sr, Rb, Mo, Sb, and U, for the purpose of verifying region of origin. Wines were diluted 2:1 with 0.2 M HN03 and element concentrations in wine were determined by inductively coupled plasma mass spectrometry (ICP-MS), with precision <5% for Cd, Sb, Ba, TI, Pb, and U; <10% for As, Rb, Sr, Mo, Cs, La, Ce, and Th; <15% for V, Mn, Fe, Cu, Zn, Ag, and Bi; <20% for Mg, Al, Ca, Co, Ni, and Br; and <25% for Li, Be, Ti, Se, and I; and 27% for CI and P. Element concentrations were log transformed to give a better evaluation of the consistency of the data given the assumptions evolved in parametric statistical models. Graphical analysis and multivariate statistics were used to discriminate wine by region, and the element Sr was found to have the highest discriminating power. Analysis of vineyard soils by X-ray fluorescence also revealed that Sr, as well as Ca, Ba, and Ti, can be used to discriminate soils from the two regions unequivocally. Note the relationship between soil and wine concentrations was not linear. Elements in wine grouped by principal component analysis showed agreement with elements grouped by ionic potential, suggesting element mobility has a strong influence on element concentrations in wine. Discriminant and cluster analysis of the Okanagan wines grouped wines made from grapes from the same vineyard to a high degree, suggesting individual vineyards could be fingerprinted for this region. The Niagara wines were grouped to a lesser extent by these statistical procedures, possibly due to the more homogeneous geology and climate of the Niagara region.
Type	Text
Resource Type	Electronic thesis or dissertation
Format	Image/jpeg; Application/pdf
Source	Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier	a1541821
Rights	The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
Collection	Electronic Theses and Dissertations
Scanning Status	Completed
PDF File	(21.03 MB) -- http://collections.mun.ca/PDFs/theses/Taylor_Vivien.pdf
CONTENTdm file name	18065.cpd