Related Experiment Video
Updated: May 24, 2026
07:04
High Precision Zinc Isotopic Measurements Applied to Mouse Organs
Published on: May 22, 2015
Stable isotopes determination in some Romanian wines
Dana Alina Magdas1, Stela Cuna, Gabriela Cristea
1Department of Mass Spectrometry, Chromatography and Applied Physics, National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca, Romania.
Isotopes in Environmental and Health Studies
|March 9, 2012
Summary
This study analyzed the isotopic fingerprint of Romanian wines, revealing how oxygen-18 and carbon-13 ratios vary with grape origin and climate. These isotopic variations help authenticate wine origins and understand environmental impacts on winemaking.
Area of Science:
- Stable isotope analysis in viticulture and enology.
- Geochemistry and environmental science applications in food authenticity.
Background:
- Wine authentication is crucial for quality control and combating fraud.
- Isotopic fingerprints (δ(18)O and δ(13)C) offer insights into wine's geographical and climatic origins.
- Romanian wines from diverse regions and grape varieties present a unique case for isotopic analysis.
Purpose of the Study:
- To investigate the isotopic fingerprint (δ(18)O and δ(13)C) of Romanian wines.
- To determine the influence of geographical origin and climatic conditions on wine's isotopic composition.
- To establish baseline isotopic data for authenticating Romanian wines.
Main Methods:
- Analysis of stable isotopes, specifically oxygen-18 (δ(18)O) and carbon-13 (δ(13)C).
- Sampling of wines from key Romanian grape varieties (Feteasca Alba, Feteasca Regala, Cabernet Sauvignon).
- Inclusion of wines from multiple vineyards and vintage years (2002-2008).
Main Results:
- Significant variations in δ(18)O values were observed, correlating with geographical location and climate.
- Feteasca Alba wines showed δ(18)O ranging from +3.28‰ to -2.60‰ across different vineyards.
- Cabernet Sauvignon wines from Dealu Mare-Tohani exhibited notable δ(18)O differences between 2003 and 2004, linked to temperature variations.
Conclusions:
- Isotopic ratios, particularly δ(18)O, are reliable indicators of wine's geographical origin and climatic history.
- The study provides valuable isotopic data for the authentication of Romanian wines.
- Environmental factors significantly impact the isotopic signature of wine, offering insights into terroir.
More Related Videos
Related Concept Videos
01:28Isotopes and Radioisotopes
In the early 1900s, English chemist Frederick Soddy realized that an element could have atoms with different masses that were chemically indistinguishable. These different types are called isotopes — atoms of the same element that differ in mass. Isotopes differ in mass because they have different numbers of neutrons but are chemically identical because they have the same number of protons. Soddy was awarded the Nobel Prize in Chemistry in 1921 for this discovery.
An isotope containing more...
An isotope containing more...
01:12Isotopes
Elements have a set number of protons that determines their atomic number (Z). For example, all atoms with eight protons are oxygen; however, the number of neutrons can vary for atoms of the same element. The sum of the number of protons and the number of neutrons is the mass number (A). Atoms with the same atomic number but different mass numbers are called isotopes. Elements can have multiple isotopes, for example, carbon-12, carbon-13, and carbon-14.
An element's atomic mass, or weight, is a...
An element's atomic mass, or weight, is a...
01:13Mass Spectrometry: Isotope Effect
Most elements exist in nature as a mixture of isotopes. The isotopes differ in weight due to their respective number of neutrons. The molecular weight of a molecule is different depending on the specific isotope of its elements involved. As a result, the mass spectrum of the molecule exhibits peaks from the same fragment at multiple positions. The positions of these mass signals depend on the mass differences between isotopes. Furthermore, the intensity of these signals is dependent on the...
01:23EDTA: Indirect and Alkalimetric Titration
Unlike direct titration, back-titration, and displacement titration, indirect titration is an EDTA titration method for quantifying anions. In the indirect titration method, anions are precipitated as their insoluble salts with excess metal ions. The filtrate containing the excess metal ions is directly titrated with standard EDTA until the endpoint is achieved. Another approach involves extracting the metal ion and back-titrating with standard EDTA to obtain the endpoint. In this way, the...
02:48Radioactive Decay and Radiometric Dating
Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
02:37Experimental Determination of Chemical Formula
The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most concise way of representing this elemental makeup. When a compound’s formula is unknown, measuring the mass of its constituent elements is often the first step in determining the formula experimentally.