What does this research mean for the field?

1H NMR-based metabolomics combined with chemometric analysis can successfully discriminate between authentic grape juice and apple juice adulteration, primarily using malic acid as a discriminant metabolite. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate 1H NMR-based metabolomics combined with chemometrics for profiling Brazilian grape juices and detecting adulteration with apple juice.

September 6, 2026Journal of Food Composition and AnalysisOpen Access

1H NMR-based metabolomic profiling and chemometric discrimination of authentic and adulterated Brazilian grape juices

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Authors

MKMirella Mallmann Kercher ADAna Paula Drehmer JDJulia Baggio Debiasi

Discussion

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Overview

Metabolomic analysis reveals effective discrimination of apple juice adulteration in Brazilian grape juices, indicating a rapid method for authenticity testing.

Key Points

To evaluate 1H NMR-based metabolomics combined with chemometrics for profiling Brazilian grape juices and detecting adulteration with apple juice.
Analyzed 65 juice samples (authentic grape juices, apple juices, and commercial juice formulations) using a 300 MHz 1H NMR spectrometer.
Conducted multivariate chemometric analyses, including principal component analysis (PCA), PERMANOVA, and partial least squares discriminant analysis (PLS-DA).
Evaluated differences across juice categories using ANOVA followed by Tukey's post hoc test (p < 0.05).
Chemometric modeling (PCA, PERMANOVA, and PLS-DA) reliably discriminated authentic grape juices from apple juices and blended formulations.
Malic acid (chemical shift at 2.59 ppm) was identified as the primary discriminant metabolite indicative of apple juice adulteration.
Carbohydrate-related spectral signals correlated predominantly with commercial juice processing and formulation variations rather than adulteration.

Cite This Study

Kercher et al. (2026) studied this question.

synapsesocial.com/papers/6a9d1df228139818eab20b5a https://doi.org/10.1016/j.jfca.2026.109496

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September 6, 2026Journal of Food Composition and AnalysisOpen Access

1H NMR-based metabolomic profiling and chemometric discrimination of authentic and adulterated Brazilian grape juices

View Full Paper

Ask AI

Bookmark

Authors

MKMirella Mallmann Kercher ADAna Paula Drehmer JDJulia Baggio Debiasi

Discussion

Member takes

Overview

Metabolomic analysis reveals effective discrimination of apple juice adulteration in Brazilian grape juices, indicating a rapid method for authenticity testing.

Key Points

To evaluate 1H NMR-based metabolomics combined with chemometrics for profiling Brazilian grape juices and detecting adulteration with apple juice.
Analyzed 65 juice samples (authentic grape juices, apple juices, and commercial juice formulations) using a 300 MHz 1H NMR spectrometer.
Conducted multivariate chemometric analyses, including principal component analysis (PCA), PERMANOVA, and partial least squares discriminant analysis (PLS-DA).
Evaluated differences across juice categories using ANOVA followed by Tukey's post hoc test (p < 0.05).
Chemometric modeling (PCA, PERMANOVA, and PLS-DA) reliably discriminated authentic grape juices from apple juices and blended formulations.
Malic acid (chemical shift at 2.59 ppm) was identified as the primary discriminant metabolite indicative of apple juice adulteration.
Carbohydrate-related spectral signals correlated predominantly with commercial juice processing and formulation variations rather than adulteration.

Cite This Study

Kercher et al. (2026) studied this question.

synapsesocial.com/papers/6a9d1df228139818eab20b5a https://doi.org/10.1016/j.jfca.2026.109496

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