The role of analytical techniques in the determination of metals and metalloids in dietary supplements: A review

Smichowski, Patricia; Londonio, Agustín

doi:10.1016/j.microc.2016.11.007

Cited by 47 publications

(25 citation statements)

References 40 publications

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“…The free zinc content in the supernatant was evaluated by flame atomic absorption spectrometry (ZA3000, HITACHI, Japan) according to Wu, Wenfei and Smichowski's methods with some modifications [17,18], the chelated zinc content was calculated. The experiments were performed in triplicates and data was presented as the mean of each repeated experiment.…”

Section: Zinc Chelating Capacity Analysismentioning

confidence: 99%

Characterizations of a Food Decapeptide Chelating with Zn(II)

Fan

Wang

Mu³

et al. 2020

eFood

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Walnut proteins and peptides have been reported to have great zinc-carrying activity. In this study, the decapeptide EPNGLLLPQY (WP-10) derived from walnut protein has been prepared to figure out zinc binding mechanisms and structureactivity relationships. The space-conformation of this peptide has converted after being chelated with Zn(II). As to secondary structure, the b-sheet structure of the peptide turned into a-helix and b-turn structure. According to the atomic absorption spectra analysis, one peptide could bind with one Zn(II) via four different binding sites. The signals of different groups in infrared spectroscopy have shifted before and after chelation, and the major functional groups of this peptide involved in chelation are-NH 2 and-C=O. GLU1, PRO2, ASP3, GLU4, and LEU6, and the molecular docking proved their participation in the chelating with Zn(II).

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Section: Zinc Chelating Capacity Analysismentioning

confidence: 99%

Characterizations of a Food Decapeptide Chelating with Zn(II)

Fan

Wang

Mu³

et al. 2020

eFood

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“…The elements determined in this study show great biological importance against several diseases, since they play an essential role in the activity of practically all enzymes, either as cofactors or in the active site of the enzyme, and the intake of each element in tolerable amounts is recommended. 17,40,41 Therefore, the knowledge of mineral contents in food matrices such as regional fruits is essential, as it provides information on nutritional and toxicological aspects.…”

Section: Mn < Zn < Fe (Micronutrients) and S < P < Ca < Mg < K (Macromentioning

confidence: 99%

Application of Mixture Design Using Diluted Acid for Extraction of Inorganic Components in Fruits of Casearia fasciculata and Determination by ICP OES: Evaluation by PCA and HCA

Romão¹,

Novais²,

Assis³

et al. 2020

J. Braz. Chem. Soc.

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This study is the first to propose the simultaneous quantification of 10 elements in fruits of Casearia fasciculata by inductively coupled plasma optical emission spectrometry (ICP OES). A method of digestion using dilute nitric acid was optimized by mixture design for extraction of elements in the seed, peel, and pulp of Casearia fasciculata cultivated in the Bahia State, Northeastern Brazil. Four different approaches were used to evaluate the digestion procedure ((i) desirability; (ii) multiple response; (iii) residual carbon content and (iv) residual acidity). The accuracy of the method of digestion was applied for the extraction of the studied elements in two certified reference materials (RM-Agro E1001a Brachiaria brizantha and NIST 1515 apple leaves). The limits of quantification of the method (µg g −1 ) were: Cr, 0.42; Cu, 0.69; Fe, 1.5; Mn, 0.14; Zn, 1.8; Ca, 29.0; K, 3.5; Mg, 1.9; P, 6.4; and S, 17. Two multivariate tools, principal component analysis (PCA) and hierarchical cluster analysis (HCA), were efficient in the formation of groups, corresponding to the fruit parts. Thus, the peel and seed of Casearia fasciculata present potential to be used as mineral supplements in human nutrition.

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“…Greater awareness about healthy ageing and the broader availability of products, as well as trends towards healthy lifestyles and disease prevention lead to an increase in vitamins and food supplements consumption. Besides the growth of self-diagnosis and self-medication by consumers, these products do not need medical prescription and are often consumed without any control or medical supervision, during extended periods of time, which constitutes a concern about the users' health [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Food Supplements for Weight Loss: Risk Assessment of Selected Impurities

et al. 2020

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Nowadays, food supplements are widely consumed, often without any medical supervision. In this study, 25 food supplements for weight loss, randomly purchased from five different suppliers in the European Union, were analysed by Wavelength Dispersive X ray Fluorescence spectrometry (WDXRF). The aim of this study was the risk assessment of trace elements and the mixture of elements present in food supplements for weight loss. The obtained Hazard Index (0.11) showed no potential risk of non-carcinogenic effects to human health. However, since humans are frequently exposed by different routes and/or sources to toxic metals, the additional consumption of these products may cause potential toxicological risks that cannot be ignored. In one analysed food supplement (FS), the simultaneous presence of Pb and Mn in high concentrations was detected. In two, FS chromium concentrations were above the reference daily dose. Unconformities were detected between the labelled and the detected values, which emphasises the misinformation of labels. This highlights the need for a deeper surveillance of food supplements.

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The role of analytical techniques in the determination of metals and metalloids in dietary supplements: A review

Cited by 47 publications

References 40 publications

Characterizations of a Food Decapeptide Chelating with Zn(II)

Characterizations of a Food Decapeptide Chelating with Zn(II)

Application of Mixture Design Using Diluted Acid for Extraction of Inorganic Components in Fruits of Casearia fasciculata and Determination by ICP OES: Evaluation by PCA and HCA

Food Supplements for Weight Loss: Risk Assessment of Selected Impurities

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