Yazar "Gonzalez-Curbelo, Miguel Angel" seçeneğine göre listele

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    Assessment of pesticide contamination in pomegranates: A multivariate approach and health risk evaluation
    (Pergamon-Elsevier Science Ltd, 2025) Gormez, Emrah; Odabas, Eylem; Golge, Ozgur; Gonzalez-Curbelo, Miguel Angel; Kabak, Bulent
    Pesticide residues in pomegranates pose a significant food safety concern, particularly given the rising global consumption of this fruit. This study monitored 316 pesticide residues in 342 pomegranate samples from Turkey's three primary pomegranate production regions using liquid chromatography-tandem mass spectrometry. Pesticide residues were detected in 72.8% of the samples, with 40 different pesticides identified, 15 of which were unauthorized. Spirotetramat, acetamiprid, and fludioxonil were among the most frequently detected, with concentrations exceeding the maximum residue levels set by the European Union in 40.6% of the contaminated samples. Multivariate analysis revealed strong correlations between specific pesticide pairs, suggesting common usage patterns. The chronic hazard index was 0.0132 for adults and 0.0403 for children, indicating no significant chronic health risks. The acute health risks for all pesticides remained below acceptable limits, except for acetamiprid, which exceeded the threshold (1.186) for children. However, the presence of non-approved pesticides, such as omethoate, raises concerns about regulatory compliance. Continued surveillance and risk assessment are essential to minimize potential health risks, particularly for vulnerable populations consuming pomegranates.
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    Determination of 355 Pesticides in Lemon and Lemon Juice by LC-MS/MS and GC-MS/MS
    (Mdpi, 2023) Aslantas, Sule; Golge, Ozgur; Gonzalez-Curbelo, Miguel Angel; Kabak, Bulent
    While pesticides have become a primary tool in modern agriculture, these compounds remain a high priority on the list of consumer concerns regarding food safety. The use of pesticides in the production and post-harvesting of lemon fruits is widely used to ensure agricultural yield and fruit quality. Therefore, monitoring studies on citrus fruits to enforce regulatory compliance and ensure food safety is in great demand. The aim of this study was to monitor multi-class pesticide residues in lemon fruits commercialized in Turkey. The transmission of residues that existed on the outer surface of the fruit into its juice was also studied. Whole fruits and lemon juice samples were prepared using the quick, easy, cheap, effective, rugged and safe (QuEChERS) methodology prior to analysis. For the screening and quantification of 355 pesticide residues, liquid chromatography-tandem mass spectrometry (LC-MS/MS) and gas chromatography-tandem mass spectrometry (GC-MS/MS) were used. The analytical method has been shown to have a sufficiently low limit of quantification with respect to current maximum residue limits (MRLs) for all target analytes. The obtained recovery and precision parameters fulfilled the requirements in DG SANTE guidelines. The in-house validated analytical method was then applied for the determination of 355 pesticide substances in 100 whole fruit samples and their juices. Sixteen different residues were detected in 43% of lemon fruits, whereas 57 lemon samples were pesticide-free. The MRLs exceedances were recorded in 29 lemon samples. The most frequently detected (17%) pesticide in lemon fruits was chlorpyrifos-methyl, with a range of 0.013-0.098 mg kg(-1). A lower frequency was detected for metamitron (10%, 0.027-0.118 mg kg(-1)), buprofezin (9%, 0.023-0.076 mg kg(-1)), pyriproxyfen (9%, 0.021-0.102 mg kg(-1)) and malathion (7%, 0.100-0.482 mg kg(-1)) in whole fruits. However, none of the pesticide residues were detected in lemon juice samples. These results showed that target analytes are unable to penetrate the lemon exocarp and/or endocarp.
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    Pesticide Residues in Mandarins: Three-Year Monitoring Results
    (Mdpi, 2023) Gormez, Emrah; Golge, Ozgur; Gonzalez-Curbelo, Miguel Angel; Kabak, Bulent
    The demand of plant production product use has increased because of the current system of citrus production, which prioritizes high agricultural yields. Therefore, the monitoring of pesticide residues in citrus fruits and other agricultural products and their impacts on human health and food security are of great concern. This study aims to determine multi-class pesticides including highly polar residues in satsuma mandarins. A total of 226 mandarin samples were collected over three consecutive harvesting years from 2019 to 2021 in the Izmir region of Turkey. Targeted compounds included pesticides and metabolites with European Union (EU) regulatory levels, plus other non-approved residues and highly polar compounds. The residues excluding highly polar substances were analyzed by applying the quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction and liquid chromatography-triple quadrupole mass spectrometry (LC-MS/MS) determination for 434 analytes and gas chromatography-triple quadrupole mass spectrometry (GC-MS/MS) determination for 71 analytes. For six highly polar pesticides, sample preparation was based on Quick Polar Pesticides (QuPPe) extraction. The polar residues were determined by LC-MS/MS using internal standards. Forty different residues, including two highly polar substances, were recorded in mandarin samples through three harvesting years. In 8.4% of the samples, no quantifiable residues were detected, whereas 207 samples contained at least one residue. The maximum residue level (MRL) exceedances were recorded for 22.1% of the samples. The two most frequently found pesticides were phosphonic acid and spirotetramat, with an incidence rate of 48.7% and 46.5%, respectively. The concentration of phosphonic acid and spirotetramat in mandarin samples varied from 0.026 to 39.386 mg kg(-1) and from 0.010 to 1.485 mg kg(-1), respectively. The results will enable researchers and regulatory authorities to assess the extent of pesticide presence, identify potential risks, and take necessary measures to ensure the safety of satsuma mandarins for consumers.
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    Pesticide residues in peaches and nectarines: Three-year monitoring data and risk assessment
    (Elsevier Sci Ltd, 2025) Keklik, Mehmet; Golge, Ozgur; Gonzalez-Curbelo, Miguel Angel; Kabak, Bulent
    Peaches and nectarines suffer from various diseases annually, prompting widespread pesticide use for pest management. As a result, pesticide residues remain a notable concern for food safety. This study assessed 474 pesticide residues in peaches and nectarines consumed in Turkey, analyzing 459 samples (164 peaches and 295 nectarines) over three harvest seasons (2021-2023). Using a validated method based on QuEChERS (quick, easy, cheap, effective, rugged, and safe) and liquid chromatography-tandem mass spectrometry, in compliance with the European SANTE/11312/2021 Guideline, residues were found in 71.3% of peaches and 71.9% of nectarines. Multiple residues were more prevalent in peaches (49.4%) than nectarines (37.6%), with 12.8% of peaches and 5.8% of nectarines exceeding maximum residue levels. Peaches contained 40 different residues, including 12 unapproved in the European Union, while nectarines had 35 residues, 13 unapproved. Common residues included thiophanate-methyl, acetamiprid, and boscalid. Hazard Index values (0.49% for adults, 0.60% for children) indicated no significant health risk from chronic pesticide exposure through peach and nectarine consumption among Turks.