Occurrence of pesticides in fruits and vegetables from organic and conventional agriculture by QuEChERS extraction liquid chromatography tandem mass spectrometry

Montiel-León, Juan Manuel; Duy, Sung Vo; Munoz, Gabriel; Verner, Marc-André; Hendawi, Mohamed; Moya, Héctor; Amyot, Marc; Sauvé, Sébastien

doi:10.1016/j.foodcont.2019.04.027

Cited by 59 publications

(33 citation statements)

References 50 publications

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“…Appropriate coefficients of determination (R 2 ) were obtained for the scope of the targeted pesticides, with R 2 in the range of 0.9900-0.9994. The LOQ values were similar to or better than those of previously published works [19][20][21]. The LOQ ranged from 0.77 to 1.79 µg/kg for OCP and 0.57-1.57 µg/kg for OPP.…”

Section: Methods Evaluationsupporting

confidence: 83%

“…The 2019 European Food Safety Authority (EFSA) report on pesticide residues in food [ 18 ] concluded that there is a lack of work in the scientific literature on organic products. There are only a few recent studies that describe chemical safety in terms of pesticides in organic lettuce samples [ 19 , 20 , 21 ]. Similarly, and in accordance with the European food legislation (Regulation (EC) No.…”

Section: Introductionmentioning

confidence: 99%

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Microbiological and Chemical Quality of Portuguese Lettuce—Results of a Case Study

Ferreira

Lopes

Costa

et al. 2020

Foods

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In addition to environmental pollution issues, social concerns about the sustainability, safety, and quality of conventionally grown fruits and vegetables have been increasing. In order to evaluate if there were any microbiological differences between samples of organic and conventional lettuce, a wide range of parameters were tested, including pathogens and indicator organisms: the enumeration of Escherichia coli; the detection of Salmonella spp.; the detection/enumeration of Listeria monocytogenes; the enumeration of lactic acid bacteria, Pseudomonas spp. yeasts and molds, and Enterobacteriaceae. This study also evaluated the chemical safety of the lettuce samples, quantifying the nitrate concentration and 20 pesticides (14 organochlorine and 6 organophosphorus pesticides). Significant differences (p < 0.05) between the conventional and organic samples were only detected for the counts of total microorganisms at 30 °C. Pathogens were absent in all the samples. The analytical method, using the quick, easy, cheap, effective, rugged, and safe (QuEChERS) approach for pesticide extraction, was suitable for detecting the targeted analytes; the limit of quantification (LOQ) was between 0.6 and 1.8 µg/kg (lower than the Maximum Residue Levels (MRLs) established by EU legislation). In three organic lettuce samples, one organochlorine pesticide (α-HCH) was observed below the MRLs. For the samples analyzed and for the parameters investigated, except for the total mesophilic counts, the organic and conventional lettuces were not different.

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Section: Methods Evaluationsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Microbiological and Chemical Quality of Portuguese Lettuce—Results of a Case Study

Ferreira

Lopes

Costa

et al. 2020

Foods

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“…We elected such weighting based on the conventional threshold for materiality (based on the interpretation of accounting and auditing guidelines issued by authoritative bodies such as the Chartered Professional Accountants of Canada or the United States Securities and Exchange Commission), as anything lower than 10% would have limited impact on the selected bidder. We opted to include language discussing accountability, given the many unrealized commitments in sustainability, examples of which include recycling plants with residual rates (% of material not recycled) ranging from 20−40% [28] and frequent mislabeling of foods as organic or sustainable [29][30][31]. Without such language, we determined that integration within the RFP could still result in minimal implementation efforts.…”

Section: Significance Of Sustainability Integrationmentioning

confidence: 99%

Assessing the Degree of Sustainability Integration in Canadian Public Sector Procurement

Ponte

Foley²,

Cho

2020

Sustainability

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The purpose of this study was to identify the current state of sustainability integration into Canadian government procurement and make recommendations on how to deepen current integration in order to accelerate the advancement of existing sustainability goals. We reviewed 50 publicly available Requests for Proposals (RFPs) issued between 2016 and 2019 and evaluated the significance of sustainability integration and the expanse of considerations using two measurement schemes. Our analysis suggests that sustainability integration into RFPs is currently superficial with limited integration into the evaluation process. We also found that the integration of sustainability was narrow with significant gaps in the breadth of environmental and social impact areas that were considered. As such, we provide insights and recommendations that will enable governments to accelerate the advancement of sustainability through the use of procurement.

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“…In recent years, several studies have reported systematic methods based on conventional analytical instruments and novel biosensors. These traditional analytical methods, recognized as the gold standard for determining pesticide residues in food samples, are very effective and fairly accurate; they comprise high-performance liquid chromatography (HPLC) [ 5 , 6 ], gas chromatography [ 7 , 8 ], mass chromatography [ 9 , 10 ], and their combinations [ 11 , 12 ]. Despite the advantages of conventional analytical methods, they are insufficient to be efficiently applied for on-site and rapid detection because of limitations such as time and labor consumption, complex procedures, and expensive equipment.…”

Section: Introductionmentioning

confidence: 99%

Selective Binding and Elution of Aptamers for Pesticides Based on Sol-Gel-Coated Nanoporous Anodized Aluminum Oxide Membrane

Lim

Park

et al. 2020

Nanomaterials

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Sol-gel-based mesopores allow the entry of target small molecules retained in their cavity and aptamers to bind to target molecules. Herein, sol-gel-based materials are applied to screen-selective aptamers for small molecules, such as pesticides. To enhance the efficiency of aptamer screening using a sol-gel, it is necessary to increase the binding surface. In this study, we applied the sol-gel to an anodized aluminum oxide (AAO) membrane, and the morphological features were observed via electron microscopy after spin coating. The binding and elution processes were conducted and confirmed by fluorescence microscopy and polymerase chain reaction. The sol-gel coating on the AAO membrane formed a hollow nanocolumn structure. A diazinon-binding aptamer was bound to the diazinon-containing sol-gel-coated AAO membrane, and the bound aptamer was effectively retrieved from the sol-gel matrix by thermal elution. As a proof of concept, a sol-gel-coated AAO disc was mounted on the edge of a pipette tip, and the feasibility of the prepared platform for the systematic evolution of ligands by exponential enrichment (SELEX) of the aptamer binding was also confirmed. The proposed approach will be applied to an automated SELEX cycle using an automated dispenser, such as a pipetting robot, in the near future.

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Occurrence of pesticides in fruits and vegetables from organic and conventional agriculture by QuEChERS extraction liquid chromatography tandem mass spectrometry

Cited by 59 publications

References 50 publications

Microbiological and Chemical Quality of Portuguese Lettuce—Results of a Case Study

Microbiological and Chemical Quality of Portuguese Lettuce—Results of a Case Study

Assessing the Degree of Sustainability Integration in Canadian Public Sector Procurement

Selective Binding and Elution of Aptamers for Pesticides Based on Sol-Gel-Coated Nanoporous Anodized Aluminum Oxide Membrane

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