Bruno Čalopek

Mr. Bruno Čalopek


Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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10 April 2024 in Foods
Verified
Journal Article
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MĐMaja Đokić
Maja Đokić
TNTamara Nekić
Tamara Nekić
IVIvana Varenina
Ivana Varenina
IVInes Varga
Ines Varga
BKBožica Solomun Kolanović
Božica Solomun Kolanović
NBNina Bilandžić
Nina Bilandžić
The aim of this study was to evaluate contamination levels and the frequency of detection of organochlorine (OCPs) and organophosphate pesticides (OPPs), pyrethroids, carbamates and polychlorinated biphenyls (seven PCB congeners) in a total of 534 samples of cow’s, sheep’s and goat’s milk and dairy products from Croatia. Concentrations above the limit of quantification (LOQ) were measured for fourteen OCPs, nine OPPs, six pyrethroids, one carbamate and PCBs with a total of 172 results, and no concentrations exceeded the maximal residue levels defined by the European Union. The mean concentrations of pesticides and the sum of seven PCBs were determined in the ranges 0.92–17.4 μg/kg and 1.38–2.74 μg/kg. Pesticides were quantified in 27% of samples, and seven PCBs were quantified in 5.23% of samples. Among the three pesticide groups, the highest numbers of quantified results were found for OCPs (12.1–20.8%). The highest frequencies of detection were found for the sum of 4,4’-dichlorodiphenyltrichloroethane and its isomers (DDTs), hexachlorobenzene and seven PCBs. The sum of seven PCBs was quantified within the range of 3.3–6.67% of samples per milk type and dairy products. Among the OPPs, the highest frequency of detection was found for chlorpyrifos in cow’s milk. Based on the estimated daily intakes, chronic risk characterisation showed no risk for adults or ten-year-old children for the consumption of cow’s milk and dairy products.

13 December 2020 in Foods
Verified
Journal Article
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NBNina Bilandžić
Nina Bilandžić
MSMarija Sedak
Marija Sedak
BČBruno Čalopek
Bruno Čalopek
MĐMaja Đokić
Maja Đokić
IVIvana Varenina
Ivana Varenina
ARAlessandra Roncarati
Alessandra Roncarati
The aim of this study was to determine the concentrations of essential, trace, and toxic elements in beef and pork meat cuts available at markets and retail chains in the Croatian capital. Significant differences in the concentrations of Al, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Se, Pb, and Zn were found between bovine cuts (p < 0.01, all) and also between pork cuts (p < 0.01, all). A risk assessment using the estimated intakes based on the lowest and highest mean values of Al, Cr, Ni, and Pb in beef and pork showed low contributions to tolerable toxicological limits. However, consumers whose diets consist of large amounts of beef and pork kidneys may be at risk because the estimated intakes for Cd and Se exceeded the toxicological limits. Consumers of large quantities of beef mixed meat may be at risk due to higher values of estimated As intakes compared to health-based guidance values. Estimation based on the provisional maximum tolerable daily intake values for Cu, Fe, and Zn showed that beef and pork cuts can be considered safe for consumption. A comparison with data from other studies shows that the concentrations of the analyzed elements in beef and pork cuts vary considerably.

8 February 2024 in Foods
Verified
Journal Article
Open access
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MĐMaja Đokić
Maja Đokić
TNTamara Nekić
Tamara Nekić
IVIvana Varenina
Ivana Varenina
IVInes Varga
Ines Varga
BKBožica Solomun Kolanović
Božica Solomun Kolanović
NBNina Bilandžić
Nina Bilandžić
Pesticides and polychlorinated biphenyls (PCBs) are persistent environmental pollutants. When entering the food chain, they can represent a public health problem due to their negative effects on health. In this study, concentrations of organochlorine pesticides (OCPs), organophosphate pesticides (OPPs), pyrethroids, carbamates, and PCBs—a total 73 compounds—were determined in a total of 2268 samples of fat tissues (beef, pork, sheep, goat, poultry, game, horse, rabbit) and processed fat, meat, and processed meat products collected in Croatia during an 8-year period. In fatty tissues, 787 results exceeded the limits of quantification (LOQ): 16 OCPs, eight OPPs, six pyrethroids, one carbamate, and seven PCBs. The most positive results in fat samples were found for OCPs, with a frequency of quantification in the range of 57.5–87.5%. Hexachlorobenzene (HCB) and dichlorodiphenyldichloroethylene (DDE) were quantified in the highest percentages, in the ranges of 5.5–66.7% and 5.4–55.8%. Concentrations above the MRL values were determined for chlorpyrifos in pork fat and for resmethrin in six fat samples and one pâté. In 984 samples of meat and meat products, only 62 results exceeded the LOQ values. The highest frequency of quantification was determined for OCPs (25 samples), of which 40% were DDT isomers (60% DDE). Frequency quantifications of PCBs in fat samples were between 7.23 and 36.7%. An evaluation of the health risk assessment showed that the consumption of fat, meat, and meat products does not pose a threat to consumer health, since all EDI values were well below the respective toxicological reference values.

7 July 2025 in Foods
Verified
Journal Article
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NBNina Bilandžić
Nina Bilandžić
IVInes Varga
Ines Varga
BČBruno Čalopek
Bruno Čalopek
BKBožica Solomun Kolanović
Božica Solomun Kolanović
IVIvana Varenina
Ivana Varenina
AKAna Končurat
Ana Končurat
In this study, the frequency of aflatoxin M1 (AFM1) occurrence in raw milk was investigated across different seasons over a three-year period from 2022 to 2024 in Croatia. Risk assessment was conducted using estimated daily intake (EDI), hazard index (HI), and margin of exposure (MOE) for various age groups and both genders. The frequency of AFM1 detection above the maximum level (ML) ranged from 1.60% to 15.1%. The average incidence of AFM1 exceeding the ML was 5.67%, with the highest incidence recorded in autumn 2024. AFM1 levels within the limit of detection (LOD) and ML were found in 13% of the samples. The average mean value of AFM1 over the three-year period was 19.2 ng/kg. The highest mean AFM1 EDI values were determined for toddlers (0.61–0.67 ng/kg bw/day) and children (0.41–0.43 ng/kg bw/day). The lowest EDI values were observed in elderly females and males (0.058–0.074 ng/kg bw/day). The EDI values for females and males were slightly different. The risk assessment, based on the HI and MOE, indicated that toddlers and children are at the highest risk of exposure to AFM1, which raises significant health concerns. Additionally, consumers of large quantities of milk face a high risk of exposure, particularly during the spring and autumn seasons. For adults and the elderly, milk consumption does not pose a serious health risk.

5 March 2026 in Foods
Verified
Journal Article
Open access
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NBNina Bilandžić
Nina Bilandžić
IVInes Varga
Ines Varga
JKJelena Kaurinović
Jelena Kaurinović
BČBruno Čalopek
Bruno Čalopek
MĐMaja Đokić
Maja Đokić
EFElena Fattore
Elena Fattore
The aim of this study was to measure per- and polyfluoroalkyl substance (PFAS) levels in eggs collected in Croatia and to identify differences between commercially produced eggs (cage, barn, and organic) and home-produced eggs (HPE). Thirty PFAS compounds were analyzed using high-performance liquid chromatography coupled with high-resolution mass spectrometry. In HPE, the highest detection frequencies above the limit of quantification were observed for perfluorooctane sulfonic acid (PFOS) at 67.6%, perfluorononanoic acid (PFNA) at 43.2%, perfluoro-n-decanoic acid (PFDA) at 43.2%, and perfluoro-n-dodecanoic acid (PFDoDA) at 35.8%. Perfluorooctanoic acid (PFOA) was detected only in HPE. Furthermore, HPE exhibited significantly higher mean lower bound (LB) and upper bound (UB) levels for all measured compounds, as well as for the sum of the four main PFAS (∑4PFAS: PFOS, PFOA, PFNA, and perfluorohexane sulfonic acid [PFHxS]), with values of 0.263 and 0.44 µg/kg, respectively. Cage eggs showed the lowest LB and UB levels. The dietary contribution of ∑4PFAS to the established tolerable weekly intake (TWI) limit of 4.4 ng/kg bw indicated that children up to nine years old are the most vulnerable to exposure, particularly infants and toddlers consuming HPE. Significantly lower exposure was observed with cage eggs; therefore, consumers are advised to prefer these eggs.

12 May 2026 in Foods
Verified
Journal Article
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NBNina Bilandžić
Nina Bilandžić
TKTomislav Klapec
Tomislav Klapec
BCBiljana Crevar
Biljana Crevar
IVInes Varga
Ines Varga
JKJelena Kaurinović
Jelena Kaurinović
LCLuka Cvetnić
Luka Cvetnić
This study evaluated the impact of a fire at a plastic recycling plant in the suburbs of Osijek on the concentrations of per- and polyfluoroalkyl substances (PFAS) in home-produced eggs (HPE) collected from nearby settlements exposed to smoke. The assessment was conducted over three time periods following the fire. Commercial eggs from supermarkets and HPE from northwestern Croatia were also analyzed. Thirteen out of 30 compounds were quantified. In both HPE groups—the one closer to and more exposed to smoke (Zone A) and the one farther from fire (Zone B)—linear perfluorooctane sulfonic acid (L-PFOS) showed the highest detection frequency (91–100%). The highest mean concentrations of L-PFOS and the sum of the four main PFAS (∑4PFAS: PFOS, perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), and perfluorohexane sulfonic acid (PFHxS)), at 1.33 μg/kg, were measured in HPE from Zone A one month after the fire. In Zone B, a lower total ∑4PFAS of 0.93 μg/kg was detected. After eight months, concentrations of all quantified compounds decreased. The sums of ∑4PFAS decreased to 0.41 μg/kg (A) and 0.37 μg/kg (B), respectively. Concentrations are higher than those from northwestern Croatia and the previously determined national average. Weekly intakes of ∑4PFAS exceeded the tolerable weekly intake for toddlers and children even eight months after the fire.