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Stable isotopes determination in some Romanian fruit juices
Dana Alina Magdas1, Romulus Puscas
1National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca 5, Romania. amagdas@itim-cj.ro
Isotopes in Environmental and Health Studies
|September 7, 2011
Summary
Stable isotope analysis of Romanian fruit juices revealed variations in isotopic composition, influenced by Transylvanian geographical and climatic conditions. Apple pulp (δ13C) showed slight differences, but no direct correlation with variety or origin was found.
Area of Science:
- Food science
- Environmental science
- Analytical chemistry
Background:
- Stable isotope analysis is a powerful tool for characterizing food products.
- Understanding the influence of geographical and climatic factors on fruit juice composition is crucial for authenticity and quality control.
Purpose of the Study:
- To characterize 45 Romanian single-strength fruit juices using stable isotope ratios.
- To investigate the impact of Transylvanian geographical, climatic, and meteorological conditions on fruit juice isotopic composition.
- To compare findings with existing literature on fruit juices.
Main Methods:
- Measurement of deuterium/hydrogen (2H/1H) and oxygen-18/oxygen-16 (18O/16O) ratios in juice water.
- Measurement of carbon-13/carbon-12 (13C/12C) ratios in fruit pulp.
- Stable isotope ratio analysis (SIRA).
Main Results:
- Isotopic composition of fruit juices varied, reflecting geographical and climatic influences.
- Slight differences in δ13C values were observed in apple pulp from different Transylvanian areas, likely due to environmental conditions.
- No significant correlation was found between apple variety or geographical origin and δ13C values.
Conclusions:
- Stable isotope analysis provides insights into the origin and environmental factors affecting fruit juices.
- Environmental conditions in Transylvania influence the isotopic signature of fruit juices.
- Further research is needed to establish robust correlations between isotopic data, fruit origin, and environmental factors.
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