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    A potential threat to black figs intended for export from Turkey: Ethephon
    (Academic Press Inc Elsevier Science, 2021) Gormez, Emrah; Golge, Ozgur; Dincay, Orhan; Kabak, Bulent
    The analysis of highly polar pesticide residues in fruits and vegetables has become a controversial issue in the last decade. This report shows the results of highly polar pesticide residues (ethephon, fosetyl aluminium (fosetyl-Al) and phosphonic acid) monitoring on black figs intended for export from Turkey. From 2017-2020, a total of 9237 black fig samples were analysed for ethephon, fosetyl-Al and phosphonic acid residues using the Quick Polar Pesticides (QuPPe) method. The method has shown to have sufficiently low limits of quantification with respect to EU Maximum Residue Levels (MRLs). The obtained recovery and precision parameters fulfil the requirements in SANTE/11813/2017 Guideline. The 16.8 % of black fig samples were detected with ethephon at quantifiable concentrations but below the EU MRL of 3 mg kg- 1. The concentration of ethephon ranged between 0.005 and 2.47 mg kg- 1. However, no quantifiable residues of fosetyl-Al and phosphonic acid were detected in any black fig samples.
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    Öğe
    Quantification of fosetyl-aluminium/phosphonic acid and other highly polar residues in pomegranates using Quick Polar Pesticides method involving liquid chromatography-tandem mass spectrometry measurement
    (Elsevier, 2021) Gormez, Emrah; Golge, Ozgur; Kabak, Bulent
    Interest in the quantification of highly polar substances in crops has noticeably increased in the last five years. This study was designed to assess quantification of six polar residues, chlorate, ethephon, fosetlyaluminium (fosetyl-Al), glyphosate, phosphonic acid and perchlorate. A total of 2513 pomegranate samples intended for export from Turkey were analysed using the Quick Polar Pesticides (QuPPe) method. The method was in-house validated with very good performance results. The limits of quantification (LOQs) for residues were much lower than the respective EU Maximum Residue Levels (MRLs). Phosphonic acid was detected in 38.5% of pomegranate samples at quantifiable concentrations, calculated as fosetyl-Al. The concentrations ranged between 0.005 and 12.9 mg kg(-1) . The 20% of pomegranate samples showed fosetyl-Al levels above the EU MRL of 2 mg kg(-1) . Other polar residues were not detected in any pomegranate samples. This is the first report about highly polar pesticides in pomegranates cultivated in Turkey. (C) 2021 Elsevier B.V. All rights reserved.