Determination of metals in bottled coconut water using an inductively coupled plasma optical emission spectrometer

de Sousa, Rafael A.; Silva, Júlio C.J.; Baccan, Nivaldo; Cadore, Solange

doi:10.1016/j.jfca.2004.02.012

Cited by 43Analytical chemistry methods developmentFood and Agricultural SciencesHeavy Metals in Plants

Determination of metals in bottled coconut water using an inductively coupled plasma optical emission spectrometer

de Sousa, Rafael A., Silva, Júlio C.J., Baccan, Nivaldo, Cadore, Solange·2005·Journal of Food Composition and Analysis

DOI 10.1016/j.jfca.2004.02.012

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Abstract

Macro- (Ca, Mg) and microconstituents (Mn, Fe, Zn and Cu) were determined in bottled Brazilian coconut water without a mineralization step using an Inductively Coupled Argon Plasma Optical Emission Spectrometer. The presence of these elements in this beverage was investigated, considering the lack of information presented by the manufacturers who mention, in general, only the Na, Ca and Fe content. The experimental parameters (plasma power, nebulization flow rate, torch configuration and yttrium as internal standard) were optimized. The determinations showed low matrix interference, RSD usually lower than 2% and good accuracy confirmed with the analysis of a reference material and the quantitative recoveries obtained in experiments using analyte addition. The ranges of concentrations (mg L(-1)) of the analytes in different brands were: Ca (178-232), Mg (87-129), Mn (1.8-3.8), Fe (0.08-0.18), Zn (0.2-0.36) and Cu (0.09-0.19). LOQ values are (mg L(-1)): Ca-2.10, Mg-0.24, Mn-0.01, Fe-0.05, Zn-0.06 and Cu-0.03. Considering the Reference Daily Intakes for Minerals (RDI), we estimated the nutritional contribution for 300 mL of the beverage, which is more relevant for Ca (6% of the RDI), Mg (8% of the RDI) and Mn (56% of the RDI).

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Marked variability was observed among analysed commercial coconut water samples in mineral composition, organoleptic quality, and physicochemical and organoleptic characteristics.
“Marked variability of the analysed samples was observed: De Sousa et al. in mineral composition [80], Abreu et al. in organoleptic quality [81], and Pinheiro et al. and Fortes et al. in physicochemical and organoleptic characteristics [82,83].”
From Coconut water preservation and processing: a review (2012) · cites this paper as [80]

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Authors: de Sousa, R. A., Silva, J. C. J., Baccan, N., & Cadore, S.
Affiliations: Universidade Estadual de Campinas (UNICAMP) (BR)
Corresponding author: Cadore, Solange
ORCID: Silva, Júlio C.J.
Cadore, Solange
Venue: Journal of Food Composition and Analysis
Publisher: Elsevier BV
Published: 2005-08
Volume: 18
Issue: 5
Pages: 399-408
ISSN: 0889-1575 (ISSN-L)
DOI: 10.1016/j.jfca.2004.02.012
OpenAlex: W1994765637
Cited by: 43
References: 22
Citations by year: 2026: 1 · 2024: 5 · 2023: 2 · 2022: 5 · 2021: 1 · 2020: 1 · 2019: 5 · 2018: 2 · 2016: 1 · 2014: 2 · 2012: 4
FWCI: 1.71
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Journal of Food Composition and Analysis (publishedVersion)
Topics: Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
Physical Sciences › Chemistry › Analytical Chemistry › Heavy Metals in Plants
Keywords: coconut water, bottled beverages, mineral content, calcium, magnesium, manganese, iron, zinc, copper, trace elements, nutritional contribution, matrix effects, yttrium internal standard

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Determination of metals in bottled coconut water using an inductively coupled plasma optical emission spectrometer

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