Cited by 377Phytochemicals and Antioxidant ActivitiesFood and Agricultural SciencesEdible Oils Quality and Analysis

Screening and Characterization of Phenolic Compounds and Their Antioxidant Capacity in Different Fruit Peels

Open access
Suleria, Hafiz A. R., Barrow, Colin J., Dunshea, Frank R.·2020·Foods

Abstract

Fruit peels have a diverse range of phytochemicals including carotenoids, vitamins, dietary fibres, and phenolic compounds, some with remarkable antioxidant properties. Nevertheless, the comprehensive screening and characterization of the complex array of phenolic compounds in different fruit peels is limited. This study aimed to determine the polyphenol content and their antioxidant potential in twenty different fruit peel samples in an ethanolic extraction, including their comprehensive characterization and quantification using the LC-MS/MS and HPLC. The obtained results showed that the mango peel exhibited the highest phenolic content for TPC (27.51 ± 0.63 mg GAE/g) and TFC (1.75 ± 0.08 mg QE/g), while the TTC (9.01 ± 0.20 mg CE/g) was slightly higher in the avocado peel than mango peel (8.99 ± 0.13 mg CE/g). In terms of antioxidant potential, the grapefruit peel had the highest radical scavenging capacities for the DPPH (9.17 ± 0.19 mg AAE/g), ABTS (10.79 ± 0.56 mg AAE/g), ferric reducing capacity in FRAP (9.22 ± 0.25 mg AA/g), and total antioxidant capacity, TAC (8.77 ± 0.34 mg AAE/g) compared to other fruit peel samples. The application of LC-ESI-QTOF-MS/MS tentatively identified and characterized a total of 176 phenolics, including phenolic acids (49), flavonoids (86), lignans (11), stilbene (5) and other polyphenols (25) in all twenty peel samples. From HPLC-PDA quantification, the mango peel sample showed significantly higher phenolic content, particularly for phenolic acids (gallic acid, 14.5 ± 0.4 mg/g) and flavonoids (quercetin, 11.9 ± 0.4 mg/g), as compared to other fruit peel samples. These results highlight the importance of fruit peels as a potential source of polyphenols. This study provides supportive information for the utilization of different phenolic rich fruit peels as ingredients in food, feed, and nutraceutical products.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.3390/foods9091206

Cites

86 of 86 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • In one study, catechin, quercetin, and chlorogenic acid were quantified in mango peels at concentrations of 7.1, 11.9, and 13.8 mg/g, respectively, which were higher than the values obtained in this work.

    “In one study, catechin, quercetin, and chlorogenic acid were quantified in mango peels at concentrations of 7.1, 11.9, and 13.8 mg·g−1, respectively, which were higher than the values obtained in this work [16].”

    From On the Path to Sustainable Cosmetics: Development of a Value-Added Formulation of Solid Shampoo Incorporating Mango Peel Extract (2023) · cites this paper as [16]

    Section 3.5.1 reports chlorogenic acid at 13.8 ± 0.9 mg/g in mango peel, and section 3.5.2 reports quercetin at 11.9 ± 0.4 mg/g. The passages in our copy do not give a 7.1 mg/g catechin value for mango peel (searched: “mango peel catechin 7.1” and “7.1”), so that number is not verified. The comparison with values in the citing authors’ own work is not attributed to this source. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • The phenolic content of mango peel varies depending on fruit species, cultivars, geographical regions, climate, soil characteristics, and cultivation methods.

    “The phenolic content varies depending on the fruit species, cultivars, and the geographical regions where they are grown. Additionally, factors such as climate, soil characteristics, and cultivation methods further contribute to differences in the composition of the peels [16].”
  • Mango peel presented the highest phenolic content among the twenty fruit peels studied.

    “The results of this study demonstrated that most of the selected peels presented a high phenolic content with very high antioxidant potential, with mango peel (MP) presenting the highest phenolic content.”
  • In a study of twenty fruit peels, most selected peels had high phenolic content and very high antioxidant potential.

    “The results of this study demonstrated that most of the selected peels presented a high phenolic content with very high antioxidant potential, with mango peel (MP) presenting the highest phenolic content.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 87 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Suleria, H. A. R., Barrow, C. J., & Dunshea, F. R.
Affiliations
  • Deakin University (AU)
  • University of Leeds (GB)
Corresponding author
Suleria, Hafiz A. R.
Venue
Foods
Publisher
MDPI AG
Published
2020-09-01
Volume
9
Issue
9
Pages
1206
ISSN
2304-8158 (ISSN-L)
OpenAlex
W3081535596
Cited by
377
References
87
Citations by year
2026: 55 · 2025: 76 · 2024: 61 · 2023: 69 · 2022: 75 · 2021: 39 · 2020: 2
FWCI
25.00
Type
journal article
Language
en
Open access
Locations
  • Foods (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by)
Funders
  • McKenzie Fellowship, The University of Melbourne, Australia (UoM-18/21)
  • Faculty Research Initiative Funds, The University of Melbourne, Australia (UoM-18/19)
  • Alfred Deakin Fellowship, Deakin University, Australia (Deakin - 2016)
Topics
  • Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
  • Physical Sciences › Chemistry › Organic Chemistry › Edible Oils Quality and Analysis
Keywords
fruit peel, phenolic compounds, antioxidant capacity, total phenolic content, total flavonoid content, total tannins, mango peel, avocado peel, grapefruit peel, phenolic acids, flavonoids, gallic acid, quercetin, free radical scavenging, nutraceuticals, agro-industrial by-products

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review