Comparative Study of Tryptophan Oxidation with ¹ O ₂ , O ₃ , • OH, O ₂ NOOH, ONOOH, and OCl – : Key and Novel Oxidation Products Identified with High-Resolution Mass Spectrometry

Joke Sierens; Yannick Verheust; Thomas S. A. Heugebaert; Katleen Raes; Kristof Demeestere; Anton Nikiforov; Nathalie De Geyter; Bruno De Meulenaer

doi:10.1021/acs.jafc.6c03539

July 27, 2026Journal of Agricultural and Food Chemistry

Comparative Study of Tryptophan Oxidation with ¹ O ₂ , O ₃ , • OH, O ₂ NOOH, ONOOH, and OCl – : Key and Novel Oxidation Products Identified with High-Resolution Mass Spectrometry

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Key Points

This research aims to compare the oxidation products of tryptophan when exposed to different reactive species.
Analyzed tryptophan oxidation under conditions including ozone and reactive nitrogen species using high-resolution mass spectrometry.
Compared results with nonthermal plasma-treated tryptophan samples.
Evaluated the impact of humid multihollow surface dielectric barrier discharge on tryptophan oxidation.
Identified fewer unique features in tryptophan oxidation products due to ozone-dominated chemistry.
Highlighted contributions of reactive nitrogen species when humidity was present during oxidation.
Demonstrated the role of different reactive species in forming distinct oxidation products of tryptophan.

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Implication

Comparative study identifies key oxidation products in tryptophan from various oxidative conditions, suggesting implications for chemical analysis.

Abstract

yielded fewer unique features. Comparison with nonthermal plasma-treated tryptophan indicated ozone-dominated chemistry, with additional reactive nitrogen species contributions under humid multihollow surface dielectric barrier discharge conditions.

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Sierens et al. (2026) studied this question.

synapsesocial.com/papers/6a69a2aec8da07d9defa6693 https://doi.org/10.1021/acs.jafc.6c03539

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Comparative Study of Tryptophan Oxidation with ¹ O ₂ , O ₃ , • OH, O ₂ NOOH, ONOOH, and OCl – : Key and Novel Oxidation Products Identified with High-Resolution Mass Spectrometry

Key Points

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Implication

Abstract

Discussion

Cite This Study

Comparative Study of Tryptophan Oxidation with ¹ O ₂ , O ₃ , • OH, O ₂ NOOH, ONOOH, and OCl – : Key and Novel Oxidation Products Identified with High-Resolution Mass Spectrometry

Key Points

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Abstract

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