DOI - Mendel University Press

DOI identifiers

DOI: 10.11118/978-80-7509-996-9-0303

VÝSKYT VYBRANÝCH KONTAMINANTŮ V HOŘKÝCH ČOKOLÁDÁCH / OCCURRENCE OF SELECTED CONTAMINANTS IN DARK CHOCOLATES

Jana Řeháková1, Zuzana Holubová1, Jana Hornová1, Dana Matulová1, Irena Řehůřková1, Jiří Ruprich1
1 Centrum zdraví, výživy a potravin, SZÚ, Palackého tř. 3a, 612 42 Brno

The National Institute of Public Health (NIPH Brno) conducted a study in which the contamination of dark chocolates (DCH) with selected heavy metals was measured and evaluated, with a focus mainly on Cd and Pb, then As, Hg, Ni, Al, Cr. The aim of the study was to verify and describe the situation on the market in the Czech Republic and to confront the conclusions of the study presented in the American magazine Consumer Reports, evaluating the situation in the USA (Cd and Pb contamination). For the NIPH study, 29 samples of chocolates without additives were taken from the market in the Czech Republic, the legislative requirement for the classification of dark chocolates was respected. Microwave mineralization was used for analytical preparation, determination of elements was carried out by accredited ICP-MS, AAS-AMA methods. A comparison of the measured concentrations of individual contaminants (with the exception of mercury) showed an increase with increasing content cocoa solids. Confrontation with EU legislation (EC Regulation 2023/915) was only carried out for Cd (maximum limit in DCH: 0.80 mg/kg fresh mass). This limit was not exceeded for any of the chocolates in both studies (Czech Republic and USA ). For Pb, the maximum limit in DCH is not established. The comparison with the USA study was carried out using the Californian MADL limits (for Cd: 4.1 μg/day and for Pb: 0.5 μg/day), the drawing of the limits for Cd and Pb was assessed. The measured values were also evaluated in terms of dietary exposure to cadmium (TWI = 2.5 μg/kg bw/week EFSA). Exposure limits for lead for comprehensive dietary exposure assessment, as in the case of cadmium, are not established.

Keywords: cocoa, chocolate, cadmium, lead, dietary exposure, limit

pages: 303-317, online: 2024



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