Pesticide residues

<< Return to all publications

Sat, 05/23/2020 - 03:46
This study measured both nutrient and pesticide concentrations at up to 13 different freshwater stream sites in New Brunswick, Nova Scotia and Prince Edward Island between 2013 and 2018. Up to 62 different pesticides were analysed in 248 discreet samples. A large majority of pesticides were below the detection limit of the laboratory while seven pesticides had at least 20% or more detections...
Sat, 05/23/2020 - 03:46
Here we describe the improvement of pesticide residue extraction from tomatoes by an improved QuEChERS method. Through Plackett–Burman design, 4 significant variables out of 11 potential variables were identified that could influence the relative deviation of measurements. The 11 variables were: amount of sample, C18, Na2SO4, NaCl, MgSO4, NaAc, GCB (graphitized carbon black), and PSA (primary–...
Fri, 05/22/2020 - 03:46
Author(s): Hengye Chen, Ou Hu, Yao Fan, Lu Xu, Lei Zhang, Wei Lan, Ying Hu, Xingrui Xie, Lixia Ma, Yuanbin She, Haiyan Fu The needing of rapid and sensitive detection method for pesticides is increasing, to facilitate its detection without complicated instruments. Herein, a novel paper-based senor was developed for the visual detection of three carbamate pesticides (metolcarb, carbofuran, and...
Thu, 05/21/2020 - 03:47
To assess the dietary exposure risks of pesticide residues in snow fungus for the general population and young children, 91 snow fungus samples were collected from major production areas in Fujian Province, China and the presence of 44 pesticides was determined. A total of thirteen pesticides were detected; 65.9% of the samples contained one or more pesticide residues. The most frequently found...
Thu, 05/21/2020 - 03:40
Detection and removal of pesticides have become increasingly imperative as the widespread production and use of pesticides severely contaminate soil and groundwater and cause serious problems to non-target species such as human and animals. Recently, new two-dimensional materials beyond graphene (e.g., transition metal dichalcogenides, layered double hydroxides), called post-graphene two-...
Wed, 05/20/2020 - 03:36
Pesticide residues are detected in food items globally at levels that may cause health problems. Paper-based analytical devices have emerged as an alternative low-cost and field-based tools for determining target analytes including the pesticide residues. However, the paper devices with colorimetric detection system are limited by lower sensitivity due to their inability to record wavelength...
Tue, 05/19/2020 - 03:37
Neonicotinoids are derivatives of synthetic nicotinoids with better insecticidal capabilities, including imidacloprid, nitenpyram, acetamiprid, thiacloprid, thiamethoxam, clothianidin, and dinotefuran. These are mainly used to control harmful insects and pests to protect crops. Their main targets are nicotinic acetylcholine receptors. In the past two decades, the environmental residues of...
Fri, 05/15/2020 - 03:42
Throughout the world, more than six billion people consume milk and milk products yearly. The safety and quality of dairy milk are regularly monitored in most countries worldwide. The Israeli monitoring program of chemical residues in milk has not changed in the last decades, focusing only on major veterinary drugs and few selected environmental contaminants such as heavy metals and persistent...
Thu, 05/14/2020 - 03:37
BACKGROUD Pesticides are widely used to control insect infestation and weeds in agriculture. However, concerns about the pesticide residues in agricultural products have been raised in recent years because of public interest in health and food quality and safety. Thus, rapid, convenient, and accurate analytical methods for the detection and quantification of pesticides are urgently required....
Thu, 05/14/2020 - 03:37
ABSTRACT BACKGROUND Cyromazine and acetamiprid are widely applied as pesticides in agriculture, causing increasing concerns about their residues in crops. In this study, cyromazine, acetamiprid and their mixture were applied to cowpea to investigate their degradation dynamics and perform a dietary risk assessment. RESULTS The dissipation behavior of cyromazine and acetamiprid in the single‐ and...
Mon, 05/11/2020 - 03:43
A new sol‐gel hybrid methyltrimethoxysilane‐chloropropyltriethoxysilane was prepared as sorbent for solid phase extraction. The extraction efficiency of the prepared sol‐gel hybrid methyltrimethoxysilane‐chloropropyltriethoxysilane were assessed by using three selected organophosphorus pesticides namely chlorpyrifos, profenofos and malathion. Gas chromatography‐mass spectrometry was used for...
Mon, 05/11/2020 - 03:40
BACKGROUND Increased awareness of consumers on food safety promotes the development of rapid and sensitive detection techniques for pesticide residues. In this study, a new type of rapid detection card for organophosphorus (OPs) and carbamates (CMs) pesticide residues was developed by electrospinning. The card involved enzyme fiber mat (EFM) and substrate fiber mat (SFM) which were prepared by...
Tue, 05/05/2020 - 03:44
The behaviour of residues of tebuconazole, prochloraz, and abamectin in rehmannia during rehmannia decoction processing was systemically assessed. The pesticides were determined by ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS) after each processing step including washing, steaming and drying, carbonising, and boiling. Results showed that the pesticide...
Tue, 05/05/2020 - 03:44
Dietary exposure of the Tunisian adult population to pesticide residue was assessed using the Total Diet Study method. In the present study 170 pesticides were searched for in 42 aggregated foods characterised by 64 food samples representing the Tunisian diet. All the food samples were collected, prepared, and analysed for remains of pesticides including organochlorine, organophosphorous,...
Sun, 05/03/2020 - 03:46
Author(s): M.A. Cámara, S. Cermeño, G. Martínez, J. Oliva The effects of the industrial processing are evaluated of the removal of 16 pesticide residues in canned apricots and peaches and in orange juice. A method of multi-residual extraction that uses QuEChERS and liquid chromatography in tandem with triple quadrupole mass spectrometry was used. The method shows good linearity for the 16...
Sat, 05/02/2020 - 03:43
Author(s): Yelena Sapozhnikova, Paul Zomer, Arjen Gerssen, Alberto Nuñez, Hans G.J. Mol A fast screening approach for simultaneous detection of twelve pesticides and seven mycotoxins in food and feed samples using flow injection (FI) mass spectrometry (MS) was developed and evaluated. Ten selected pesticides represented five pairs of structural isomers to challenge their MS differentiation...
Sat, 05/02/2020 - 03:42
Author(s): Jingchun Shi, Li Xiang, Xiaoxiao Wang, Helong Ren, Longmeng Wei, Pengcheng Chen Disposal of e-waste is a global issue and has caused serious pollution in recycling areas. Most of these areas had once developed intensive agriculture and might incur organochlorine pesticides (OCPs) pollution. However, this used to be neglected. Here we discuss the joint effects via analyzing OCPs and...
Sat, 05/02/2020 - 03:36
The effect of cold plasma (CP) treatment on the degradation of anilazine fungicide in tomato juice was investigated. Anilazine solution of 5 mg/L was added to tomato juice samples and treated using a dielectric barrier discharge (DBD) cold plasma (CP) system with exposure times of 0, 1, 2, 3, 4 and 5 min. The gas chromatography‐mass spectrometry (GC‐MS) results showed that the reduction of...
Thu, 04/30/2020 - 03:48
Author(s): Tuan-Kiet Ly, Tuan-Dat Ho, Philippe Behra, Tran-Thi Nhu-Trang Maximum residue limits (MRLs) for pesticides have been established in teas for quality control and protection of consumer health in many countries and regions, including Europe. It is, however, challenging to quantify multi-pesticide residues at low concentrations in complex matrices, such as tea. In this study, highly...
Sun, 04/26/2020 - 03:34
In this study, the photodegradation of organophosphorus (OPs) pesticides in the honey medium was evaluated under sunlight irradiation. Some of the 22 samples collected at different sites contained OPs pesticides (Methyl parathion, Coumaphos and Fenitrothion) with an average of 8 ng/g. Moreover, three samples were found with pesticide residue levels exceeding the maximum residue limits (MRL ≥ 50 ...
Thu, 04/23/2020 - 03:34
Water quality degradation by organochlorine pesticides and potentially toxic elements is of worldwide concern. This research explores groundwater conditions, regarding organochlorine pesticides and potentially toxic elements, in Hopelchen, Campeche, which is located in the buffer zone of the Calakmul Biosphere Reserve. Unfortunately, agriculture is allowed and agrochemical use is not monitored...
Thu, 04/23/2020 - 03:33
The potential of double-stranded RNAs (dsRNAs) for use as topical biopesticides in agriculture was recently discussed during an OECD (Organisation for Economic Co-operation and Development) Conference on RNA interference (RNAi)-based pesticides. Several topics were presented and these covered different aspects of RNAi technology, its application, and its potential effects on target and non-target...
Tue, 04/21/2020 - 03:42
This paper provides the results of the first research designed to test for pesticide residue analysis conducted on seed yam (Dioscorea rotundata Poir) tubers produced via the Adaptive Yam Minisett technique (AYMT). AYMT uses a pesticide-based water dip to treat setts (~75 g) cut from a yam tuber, and these setts are planted to produce healthy seed yams. While the dip is known to be effective in...
Sun, 04/19/2020 - 03:36
This preliminary study describes the use of high resolution and accuracy mass spectrometry techniques combined with new generation chemical software products for detecting and identifying contaminants in food commodities. As a first step, the extracts of routine target analysis samples (obtained in our official laboratory responsible for food residues control) were acquired and processed with...
Sun, 04/19/2020 - 03:36
In this paper, the technique of continuous sample drop flow microextraction (CSDF-ME) is developed by the addition of a narrow-necked conical vessel. In the developed technique, an organic solvent denser than water is used for the extraction of organophosphorus pesticides (OPPs) from fruit juice and river water, followed by analysis with GC-MS. Eight milliliters of the sample solution is pumped...
Fri, 04/17/2020 - 03:27
Exposure to polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) through food, water, and air occurred during the life, which may change telomere length (TL) in peripheral blood leukocytes. The present study was designed to investigate the association between TL and serum levels of PCBs and OCPs in Tehran male’s population. Whole blood samples were randomly taken from 300 adult...
Thu, 04/16/2020 - 03:34
Author(s): Chan Zhang, Zejun Jiang, Maojun Jin, Pengfei Du, Ge Chen, Xueyan Cui, Yudan Zhang, Guoxin Qin, Feiyan Yan, A.M. ABD El-Aty, Ahmet Hacimüftüoğlu, Jing Wang Herein, we developed a multi-analyte fluorescence immunoassay for detection of three organophosphate pesticides (triazophos, parathion, and chlorpyrifos) in various agro-products (rice, wheat, cucumber, cabbage, and apple) using...
Thu, 04/16/2020 - 03:28
Bacillus thuringiensis (Bt) is efficient, strongly specific, and avirulent to humans, making it one of the most popular biopesticides in the world. Bt LLP29 is a mosquitocidal strain that was first isolated from Magnolia denudata. To understand its molecular mechanism against mosquitoes, the genome of Bt LLP29 was sequenced and annotated in this study. The LLP29 genome was found to have a total...
Tue, 04/14/2020 - 03:36
by Line Lomheim, Laurent Laquitaine, Suly Rambinaising, Robert Flick, Andrei Starostine, Corine Jean-Marius, Elizabeth A. Edwards, Sarra Gaspard The historic use of chlordecone (C10Cl10O) as a pesticide to control banana weevil infestations has resulted in pollution of large land areas in the French West Indies. Although currently banned, chlordecone persists because it adsorbs strongly to soil...
Sat, 04/11/2020 - 03:29
Monitoring biological samples at trace levels of chemicals from anthropogenic actions such as pesticides, pharmaceuticals and hormones has become a very important subject. This work describes a method for the determination of 8 compounds of different chemical classes in human urine samples. Dispersive liquid‐liquid microextraction based on magnetic ionic liquids was used as the sample preparation...
Thu, 04/09/2020 - 03:36
Author(s): Zhe Qian, Yao Mao, Shuai Xiong, Bo Peng, Wei Liu, Huafeng Liu, Yuan Zhang, Wei Chen, Hong Zhou, Shihua Qi Historical residual of persistent organic pollutants (POPs) in flood sediment from a karst cave were investigated. Fifteen vertical sediment samples were collected from a 6 m-deep flood sediment profile in the Longwang Cave, and the concentrations of organochlorine pesticides (OCPs...
Wed, 04/08/2020 - 03:33
The recent Regulation (EU) 2019/1381, published on the 6th September 2019, aims to improve the transparency and sustainability of the EU risk assessment in the food chain by amending the General Food Law Regulation (EC 178/2002) and a number of other regulations related to the food sector. This Regulation is introduced as a response to the Fitness Check of the General Food Law Regulation as well...
Sat, 04/04/2020 - 03:49
Anthracnose and grapevine leaf spot are the most important fungal diseases of fox grape in Brazil caused by Sphaceloma ampelinum and Pseudocercospora vitis, respectively. Severe attacks of either diseases can affect the yield in the current and subsequent years. Synthetic fungicides are recommended to control these pathogens in the field but may be harmful to the environment and human health over...
Fri, 04/03/2020 - 03:33
Author(s): Ishwar Chandra Yadav, Ningombam Linthoingambi Devi, Jun Li, Gan Zhang While contamination of indoor environment with organochlorine compounds (OCs) is well documented worldwide, only a few studies highlighted the problem of indoor pollution in Indian sub-continent, including Nepal. This study insight the contamination level, distribution pattern, and sources of OCs in indoor dust from...
Thu, 04/02/2020 - 03:34
Algae products are attracting growing interest due to their pleasant taste and their high contents in protein, essential amino acids, vitamins, and minerals. Specifically, spirulina products are widely promoted for their high vitamin B12 content. So far, knowledge regarding the contamination with cyanotoxins, heavy metals, pesticides, or polycyclic aromatic hydrocarbons (PAHs) is scarce, although...
Wed, 04/01/2020 - 03:34
To discover natural-product-based pesticides, 7β-oxycarbonylandrographolide derivatives were stereoselectively constructed from a labdane diterpenoid andrographolide. Among them, 2′-(n)Pr-1′,3′-dioxin-7β-oxy(m-Cl)benzoylandrographolide (IIc), 2′-(n)Pr-1′,3′-dioxin-7β-oxyacetylandrographolide (IIf), 2′-(p-Me)Ph-1′,3′-dioxin-7β-oxy(o-Cl)benzoylandrographolide (Vb), and 2′-(p-Me)Ph-1′,3′-dioxin-7β-...
Wed, 04/01/2020 - 03:34
by Lucille Rey-Cadilhac, Ronan Cariou, Anne Ferlay, Catherine Jondreville, Carole Delavaud, Yannick Faulconnier, Sébastien Alcouffe, Pascal Faure, Philippe Marchand, Bruno Le Bizec, Stefan Jurjanz, Sylvain Lerch Food safety crises involving persistent organic pollutants [POPs, e.g. dioxins, polychlorinated biphenyls (PCBs), organochlorine pesticides] lead to systematic slaughter of livestock to...
Sat, 03/28/2020 - 03:25
In the present study, an elevated temperature homogeneous liquid extraction coupled with ionic liquid‑based dispersive liquid–liquid microextraction was developed to extract five carbamate pesticides (pirimicarb, carbaryl, methiocarb, aldicarb, and carbofuran) from packed fruit juice samples. The method consisted of a two-step procedure in which cyclohexylamine was used in order to extract the...
Sat, 03/28/2020 - 03:25
Lindane (γ-hexachlorocyclohexane) is an organochlorine pesticide that has been widely used in agriculture over the last seven decades. The increasing residues of lindane in soil and water environments are toxic to humans and other organisms. Large-scale applications and residual toxicity in the environment require urgent lindane removal. Microbes, particularly Gram-negative bacteria, can...
Wed, 03/25/2020 - 03:33
by Fatemeh Ashrafi Tafreshi, Zahra Fatahi, Seyedeh Fatemeh Ghasemi, Amirali Taherian, Neda Esfandiari Pesticides, widely used in modern agriculture, could potentially cause environmental pollution and affect human lives. Hence, the development of a highly sensitive sensing element to detect pesticide residues is crucial for food safety and ecosystem protection. Optical methods based on...
Tue, 03/24/2020 - 03:59
Author(s): Lubin Qi, Wenli Wu, Qi Kang, Qiongzheng Hu, Li Yu Here, we demonstrate use of acetylcholinesterase (AChE)-responsive polyoxometalate (POM)/surfactant supramolecular spheres to build a liquid crystal (LC)-based sensing platform for detection of organophosphorus pesticides. The self-assembled spheres are composed of hybrid materials of a POM, sodium dodecatungstophosphate (PW12), and a...
Sun, 03/22/2020 - 03:31
Author(s): Congcong Yu, Dongyu Hao, Qiao Chu, Ting Wang, Songnan Liu, Tao Lan, Fenghe Wang, Canping Pan Tea polyphenols, chlorophyll and lutein generally cause strong matrix effects and challenge analysis of trace substances in tea. Seven frequently used adsorbents were chosen to test removal ability for tea polyphenols, chlorophyll and lutein based on the adsorption isotherm fitting. Results...
Sun, 03/22/2020 - 03:31
Author(s): Chao Feng, Qian Xu, Xinlei Qiu, Yu'e Jin, Jieyun Ji, Yuanjie Lin, Sunyang Le, Guoquan Wang, Dasheng Lu A rapid and high-throughput method using both GC–MS/MS and UPLC-Q-Orbitrap systems was applied for pesticide multi-residues analysis in food samples. Strategies based on QuEChERs extraction, intelligent data mining tools with in-house/online database, and in-silico fragment prediction...
Sat, 03/21/2020 - 03:33
Author(s): Xiao Zhigang, Wang Lishuang, Zhang Yirui, Wang Yanwen, Ahmed S.M. Saleh, Zhu Minpeng, Gao Yuzhe, Xu caihong, Mohamed E. Hassan, Yang Qingyu, Duan Yumin The removal oforganophosphorus pesticides residues from wastewater of fruits and vegetables processing as well as other agricultural processes by a low-cost, environment-friendly, and efficient strategy is necessary. In this study, rice...
Mon, 03/16/2020 - 03:27
ABSTRACT Pesticides have posed significant threats to aquatic ecosystems, yet little is known about their transformation products. The challenge is to simultaneously analyze various pesticides and transformation products in water as they have distinct physicochemical properties. A mix‐mode solid phase extraction method was established to simultaneously analyze current‐use pesticides and their...
Fri, 03/13/2020 - 03:25
Intensive agricultural and livestock activities demand high pesticide use and, consequently, contaminants reach aquatic ecosystems. In the lower Jacuí River, southern Brazil, there is a lack of knowledge about pesticide residues in water samples and the biochemical responses in native fish species. Thus, this study aimed to estimate the influence of pesticide residues and water parameters to...
Fri, 03/13/2020 - 03:25
Strobilurin fungicides have been widely used in agricultural fields for decades. These pesticides are designed to manage fungal pathogens, although their broad-spectrum mode of action also produces non-target impacts. Therefore, the removal of strobilurins from ecosystems has received much attention. Different remediation technologies have been developed to eliminate pesticide residues from soil/...
Thu, 03/12/2020 - 03:33
Author(s): Lijun Han, Yelena Sapozhnikova A fast, fit-for-purpose, high-throughput method was developed and validated for the analysis of 302 targeted contaminants in catfish muscle. Targeted contaminants included pesticides and metabolites with US regulatory levels, plus other lipophilic pesticides and environmental contaminants: PAHs, PCBs, PBDEs and other flame retardants. The sample...
Wed, 03/11/2020 - 03:26
Biological control is emerging as a feasible alternative to chemical pesticides in agriculture. Measuring the microbial biocontrol agent (mBCA) populations in the environment is essential for an accurate environmental and health risk assessment and for optimizing the usage of an mBCA-based plant protection product. We hereby show a workflow to obtain a large number of qPCR markers suitable for...
Wed, 03/11/2020 - 03:26
Insect nervous systems offer unique advantages for studying interactions between sensory systems and behavior, given their complexity with high tractability. By examining the neural coding of salient environmental stimuli and resulting behavioral output in the context of environmental stressors, we gain an understanding of the effects of these stressors on...

Pages