Organochlorine Pesticide Residues in Strawberries from Integrated Pest Management and Organic Farming

Fernandes, Virgínia Cruz; Domingues, Valentina F.; Mateus, Nuno; Delerue–Matos, Cristina

doi:10.1021/jf103899r

Cited by 59 publications

(38 citation statements)

References 24 publications

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“…Regarding DDT and its metabolites, there was no correlation between levels in vAT and scAT, but again the concentration in vAT was higher. The main contribution to the overall contamination with this group of compounds came from p,p 0 -DDE, probably deriving from dietary exposure or from o,p 0 -DDT metabolism, even after its use was banned in Portugal since 1988 (Fernandes et al, 2011;Correia-Sa et al, 2012). As suggested in the literature (Turyk et al, 2009;Lee et al, 2011), p,p 0 -DDE is closely correlated with glucose metabolism impairment, which according to our results seems to be more influenced by their presence in vAT.…”

Section: Discussionsupporting

confidence: 68%

Persistent organic pollutant levels in human visceral and subcutaneous adipose tissue in obese individuals—Depot differences and dysmetabolism implications

Pestana

Faria

Sá

et al. 2014

Environmental Research

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A B S T R A C TBackground: The role of persistent organic pollutants (POPs) with endocrine disrupting activity in the aetiology of obesity and other metabolic dysfunctions has been recently highlighted. Adipose tissue (AT) is a common site of POPs accumulation where they can induce adverse effects on human health. Objectives: To evaluate the presence of POPs in human visceral (vAT) and subcutaneous (scAT) adipose tissue in a sample of Portuguese obese patients that underwent bariatric surgery, and assess their putative association with metabolic disruption preoperatively, as well as with subsequent body mass index (BMI) reduction. Methods: AT samples (n¼ 189) from obese patients (BMI Z35) were collected and the levels of 13 POPs were determined by gas chromatography with electroncapture detection (GC-ECD). Anthropometric and biochem-ical data were collected at the time of surgery. BMI variation was evaluated after 12 months and adipocyte size was measured in AT samples. Results: Our data confirm that POPs are pervasive in this obese population (96.3% of detection on both tissues), their abundance increasing with age (RS ¼ 0.310, po0.01) and duration of obesity (RS ¼ 0.170, po0.05). We observed a difference in AT depot POPs storage capability, with higher levels of ΣPOPs in vAT (213.97204.2 compared to 155.17147.4 ng/g of fat, po0.001), extremely relevant when evaluating their metabolic impact. Furthermore, there was a positive correlation between POP levels and the presence of metabolic syndrome components, namely dysglycaemia and hypertension, and more importantly with cardiovascular risk (RS ¼ 0.277, po0.01), with relevance for vAT (RS ¼ 0.315, po0.01). Finally, we observed an interesting relation of higher POP levels with lower weight loss in older patients. Conclusion: Our sample of obese subjects allowed us to highlight the importance of POPs stored in AT on the development of metabolic dysfunction in a context of obesity, shifting the focus to their metabolic effects and not only for their recognition as environmental obesogens.

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Section: Discussionsupporting

confidence: 68%

Persistent organic pollutant levels in human visceral and subcutaneous adipose tissue in obese individuals—Depot differences and dysmetabolism implications

Pestana

Faria

Sá

et al. 2014

Environmental Research

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“…These QuEChERS compositions were described to be a good extractor source. [28,29] amounts of the rocket sample (3g, 4g and 5g) were tested in order to observe the perform and the efficiency of QuEChERS chosen. The best recoveries were obtained, when it was used the QuEChERS composition of 6g of magnesium sulphate and 4g of rocket sample.…”

Section: Quechers Optimizationmentioning

confidence: 99%

Eruca sativa: Benefits as antioxidants source versus risks of already banned pesticides

Maia

Correia-Sá

Coelho

et al. 2015

Journal of Environmental Science and Health, Part B

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Eruca sativa (rocket salad) has been intensely consumed all over the world, insomuch as, this work was undertaken to evaluate the antioxidant status and the environmental contamination (positive and negative nutritional contribution) of leaves and stems from this vegetable. Antioxidant capacity of rocket salad was assessed by mean of optical methods, such as the total phenolic content (TPC), reducing power assay and DPPH radical scavenging activity. The extent of the environmental contamination was reached through the quantification of thirteen organochlorine pesticides (OCP) by using gas chromatography coupled with electron-capture detector (GC-ECD) and compound confirmations employing gas chromatography tandem mass-spectrometry (GC-MS/MS). The OCP residues were extracted by using Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) methodology.The extent of the environmental contamination was reached through the quantification of thirteen OCP by using gas chromatography coupled with electron-capture detector (GC-ECD) and compound confirmations employing GC-MS/MS. The OCP residues were extracted by using Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) methodology. This demonstrated that leaves presented more antioxidant activity than stems, emphasizing that leaves contained six times more polyphenolic compounds than stems. In what concerns the OCP occurrence, the average recoveries obtained at the three levels tested (40, 60 and 80 µg kg(-1)) ranged from 55% to 149% with a relative standard deviation of 11%, (except hexachrorobenzene). Three vegetables samples were collected from supermarkets and analysed following this study. According to data, only one sample achieved 16.21 of β-hexachlorocyclohexane, confirmed by GC-MS/MS. About OCP quantification, the data indicated that only one sample achieved 16.21 µg kg(-1) of β-hexachlorocyclohexane, confirmed by GC-MS/MS, being the QuEChERS a good choice for the of OCPs extraction. Furthermore, the leaves consumption guaranty higher levels of antioxidants than stems.

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“…The LODs obtained in different matrices were similar between them. The found values of LOD (0.001-0.11 μg kg −1 ) in strawberry sample are lower than those obtained using QuEChERS with GC-ECD and GC-MS/MS method [44], which demonstrates the high sensitivity of the method. Full details of these parameters (Linearity, CV, LOD) for each one of the pesticides are provided in Supporting Information Table S1.…”

Section: Validation Of the Sdme Analytical Methodsmentioning

confidence: 74%

The development and optimization of a modified single-drop microextraction method for organochlorine pesticides determination by gas chromatography-tandem mass spectrometry

et al. 2012

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We have developed a new method for single-drop microextraction (SDME) for the preconcentration of organochlorine pesticides (OCP) from complex matrices. It is based on the use of a silicone ring at the tip of the syringe. A 5 μL drop of n-hexane is applied to an aqueous extract containing the OCP and found to be adequate to preconcentrate the OCPs prior to analysis by GC in combination with tandem mass spectrometry. Fourteen OCP were determined using this technique in combination with programmable temperature vaporization. It is shown to have many advantages over traditional split/splitless injection. The effects of kind of organic solvent, exposure time, agitation and organic drop volume were optimized. Relative recoveries range from 59 to 117 %, with repeatabilities of <15 % (coefficient of variation) were achieved. The limits of detection range from 0.002 to 0.150 μg kg −1 . The method was applied to the preconcentration of OCPs in fresh strawberry, strawberry jam, and soil.

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Organochlorine Pesticide Residues in Strawberries from Integrated Pest Management and Organic Farming

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Cited by 59 publications

References 24 publications

Persistent organic pollutant levels in human visceral and subcutaneous adipose tissue in obese individuals—Depot differences and dysmetabolism implications

Persistent organic pollutant levels in human visceral and subcutaneous adipose tissue in obese individuals—Depot differences and dysmetabolism implications

Eruca sativa: Benefits as antioxidants source versus risks of already banned pesticides

The development and optimization of a modified single-drop microextraction method for organochlorine pesticides determination by gas chromatography-tandem mass spectrometry

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