Isotopic Fingerprinting

Marchetti, Andrea; Durante, Caterina; Bertacchini, Lucia

doi:10.1002/9781118810224.ch5b

Cited by 4 publications

(5 citation statements)

References 149 publications

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“…The result (0.710248 ± 0.000013) fell within the range of both the certified value (0.71034 ± 0.00026) and the generally accepted value (0.710263 ± 0.000016), expressing the uncertainty as 2σ . The repeatability of the measurements both intraday and interday was highly satisfying, with relative standard deviation (RSD) equal to 0.0011%, which is in agreement with the performances of other authors. − The absence of fractionation during the Sr-separation step was verified including the certified standard material in the separation step. No significant differences between the separated and nonseparated standard were detected.…”

Section: Results and Discussionsupporting

confidence: 87%

Plant Sr Isotope Ratios As Affected by the Sr Isotope Ratio of the Soil and of the External Sr Inputs

Aguzzoni

Bassi

Robatscher

et al. 2018

J. Agric. Food Chem.

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The Sr/Sr ratio of a produce is generally linked with the soil geological features of the growing areas. This study aimed at assessing to which extent the addition of external Sr by agricultural practices, like irrigation and mineral nutrient supply, influences this relationship. In a first experiment, oat plants in two soils reflected the Sr/Sr of the soil. However, this link was significantly altered at increasing levels of external Sr soil supplies. In a second experiment, apple trees transplanted in pots modified their original Sr/Sr, which became progressively closer to the soil Sr isotope ratio. The addition of tap water and fertilizers, with different Sr isotopic signatures, slightly affected plant Sr/Sr. Results confirm the potential of the Sr/Sr ratio as a geographical tracer of agricultural commodities, but whenever the range of Sr/Sr variability among soils from different geographical areas is narrow, the influence of external Sr-sources may smooth over these diversities.

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Section: Results and Discussionsupporting

confidence: 87%

Plant Sr Isotope Ratios As Affected by the Sr Isotope Ratio of the Soil and of the External Sr Inputs

Aguzzoni

Bassi

Robatscher

et al. 2018

J. Agric. Food Chem.

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“…Moreover, analytical indicators can be successfully applied to promote high‐quality food products characterized by an undeniable link with their terroir, e.g. products with PDO (protected designation of origin) and PGI (protected geographical indication) labels 9 . For the tutelage of these products, analytical techniques can become essential to support legal cases and verify the authenticity of PDO and PGI products 10–12 .…”

Section: Introductionmentioning

confidence: 99%

“…2 H versus 1 H) and hence during biochemical, chemical and physical processes a depletion or enrichment of one isotope against the others occurs (fractionation) 24 . Recent development of the analytical techniques have also determined a larger application of the isotope ratio of heavy elements as geographical tracers, particularly the strontium isotope ( 87 Sr/ 86 Sr) ratio 9 . Indeed, the 87 Sr/ 86 Sr ratio of horticultural products like apples is directly related to that of the strontium (Sr)‐bioavailable fraction in the soil, which mainly depends and varies according to the geo‐lithological features of the growing area 26–28 .…”

Section: Introductionmentioning

confidence: 99%

“…products with PDO (protected designation of origin) and PGI (protected geographical indication) labels. 9 For the tutelage of these products, analytical techniques can become essential to support legal cases and verify the authenticity of PDO and PGI products. 10 , 11 , 12 Different approaches have been tested to trace agricultural products, including the analysis of their multi‐element and multi‐isotope composition combined to several chemometric tools, as reported in several reviews.…”

Section: Introductionmentioning

confidence: 99%

“… 24 Recent development of the analytical techniques have also determined a larger application of the isotope ratio of heavy elements as geographical tracers, particularly the strontium isotope ( 87 Sr/ 86 Sr) ratio. 9 Indeed, the 87 Sr/ 86 Sr ratio of horticultural products like apples is directly related to that of the strontium (Sr)‐bioavailable fraction in the soil, which mainly depends and varies according to the geo‐lithological features of the growing area. 26 , 27 , 28 Its high potential as soil‐derived traceability marker to distinguish different types of horticultural products according to their origin has been demonstrated in several studies.…”

Section: Introductionmentioning

confidence: 99%

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Multi‐chemical analysis combined with chemometrics to characterize PDO and PGI Italian apples

Aguzzoni

Bassi²,

Pignotti³

et al. 2021

J Sci Food Agric

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BACKGROUND The use of PDO (protected designation of origin) and PGI (protected geographical indication) labels allows to protect and promote agricultural products characterized by unique features related to the place of origin and traditional know‐how. However, the presence of non‐authentic products in the market represents a fraud that can be tackled applying analytical techniques combined with chemometric analysis. In this study, we applied multi‐element and multi‐isotope analysis to characterize PDO and PGI apples cultivated in northern Italy, comparing them with Italian apples without labels of geographical indications. RESULTS The multi‐element and multi‐isotope approach allowed to characterize the apples cultivated in northern Italy. Despite a significant effect of the sampling sites on the apple composition, the comparison of the multi‐chemical fingerprint of the apples significantly varied among cultivation areas. Results of this characterization were used to classify samples according to their cultivation area applying a linear discriminant analysis (LDA). Outputs of the LDA showed that correct sample classification can be successfully achieved (balanced accuracy > 96%). Moreover, using a selection of variables, it was possible to correctly classify samples also at regional level. CONCLUSION The presented evidences indicate that the multi‐element and multi‐isotope fingerprint can be successfully applied to traceability studies. The combination of this characterization with chemometric tools allows the classification of Italian apples based on their origin both on a national and regional scale. This approach represents an interesting tool to enhance and protect PDO and PGI Italian products. © 2021 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Sr isotope composition of Golden Delicious apples in Northern Italy reflects the soil ⁸⁷Sr/⁸⁶Sr ratio of the cultivation area

et al. 2020

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BACKGROUND Apples have a leading role in the Italian fruit sector, and high‐quality apples, including the Golden Delicious variety, are cultivated mainly in the Northern mountain districts. In the present study, Golden Delicious apples from PDO (Protected Designation of Origin) and PGI (Protected Geographical Indication) cultivation districts were characterized according to their Sr isotope composition and compared with apples from other Northern Italian districts. RESULTS Apples collected in two consecutive years (2017 and 2018) confirmed the low annual variability of the 87Sr/86Sr ratio. The isotope ratio of apples was highly correlated with that of the soil extracts of the respective orchards. Statistical differences were highlighted between cultivation districts. However, because similar geological features characterized some areas, their ratios overlapped and a complete separation of the districts was not possible. CONCLUSION The 87Sr/86Sr ratio is an excellent marker for studies of food traceability because it retains the information about the place of origin. However, its strength is limited when comparing products from cultivation areas sharing similar geological features. In the perspective of geographical traceability, a multichemical characterization can overcome the limits of single‐parameter approach. © 2020 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Isotopic Fingerprinting

Cited by 4 publications

References 149 publications

Plant Sr Isotope Ratios As Affected by the Sr Isotope Ratio of the Soil and of the External Sr Inputs

Plant Sr Isotope Ratios As Affected by the Sr Isotope Ratio of the Soil and of the External Sr Inputs

Multi‐chemical analysis combined with chemometrics to characterize PDO and PGI Italian apples

Sr isotope composition of Golden Delicious apples in Northern Italy reflects the soil ⁸⁷Sr/⁸⁶Sr ratio of the cultivation area

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Isotopic Fingerprinting

Cited by 4 publications

References 149 publications

Plant Sr Isotope Ratios As Affected by the Sr Isotope Ratio of the Soil and of the External Sr Inputs

Plant Sr Isotope Ratios As Affected by the Sr Isotope Ratio of the Soil and of the External Sr Inputs

Multi‐chemical analysis combined with chemometrics to characterize PDO and PGI Italian apples

Sr isotope composition of Golden Delicious apples in Northern Italy reflects the soil 87Sr/86Sr ratio of the cultivation area

Contact Info

Product

Resources

About

Sr isotope composition of Golden Delicious apples in Northern Italy reflects the soil ⁸⁷Sr/⁸⁶Sr ratio of the cultivation area