JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Qinghua Yao,Deseng Su,Minmin Huang,Yunyun Zheng,Meizhen Chen,Qiu Lin,Hui Xu,Shaoxiao Zeng
Sensitive, simple and quick methods for determination of dinotefuran , cyromazine , and the metabolites 1-methyl-3-(tetrahydro-3-furylmethyl) guanidine (DN), 1-methyl-3-(tetrahydro-3-furylmethyl) urea (UF), and melamine in Agrocybe aegerita were established and validated by ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). The dissipation and residues of these compounds in A. aegerita were investigated. The field results showed that dinotefuran and cyromazine dissipated rapidly with half-lives ranging from 24.9 h to 38.5 h. The terminal residues of total dinotefuran (the sum of dinotefuran and its metabolites), cyromazine, and melamine in fresh mushroom samples collected with sampling intervals of 3 d to 6 d ranged from 0.089 to 0.652 mg/kg, 0.593 to 2.054 mg/kg, and 0.002 to 0.005 mg/kg, respectively. During the drying processes of A. aegerita, the processing factors of dinotefuran, cyromazine, DN, UF, and melamine were 0.028, 0.012, 0.301, 0.002, and 0.001, respectively. Given that cyromazine and dinotefuran are not registered for use on A. aegerita , dietary risk was assessed. Based on a consumption survey, risk quotient (RQ) values significantly below 1 implied that the risk of A. aegerita consumption was acceptable, although the risk for children was relatively higher. The findings could provide valuable guidance for the appropriate use of these insecticides in A. aegerita cultivation and serve as a scientific reference for setting corresponding maximum residue limits (MRL) in China.
研究领域:
食品科学
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环境毒理学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2021
·
IF 4.291
Xue Liu,Yong Zhou,Yongqiang Ma,Song Fang,Fanyu Kong,Xueli Pang
It is well known that the widespread residue of the neonicotinoids dinotefuran in aquatic environment has adverse effects on non-target organisms. Therefore, the efficient removal of dinotefuran in water environment is an important measure to control its safety risk. In the present study, layered phosphorus-doped carbon nitride (HPCN 0.5 ) was prepared via a simple hydrothermal method and applied for photocatalytic degradation of dinotefuran. With the addition of phosphorous acid, a tube-like structure was observed in HPCN 0.5 and planar sheets were stacked inside the tubes. Compared to bulk g-C 3 N 4 , the degradation efficiency of dinotefuran was 6 times higher. According to the reaction mechanism and product identification analysis, the main photodegradation pathways correspond to demethylation and hydroxylation. The result of the acute toxicity test revealed the toxicity of dinotefuran to earthworm was greatly reduced after photodegradation by HPCN 0.5 . In addition, HPCN 0.5 was capable of simultaneously removing three other commonly used neonicotinoids. This work proved that HPCN 0.5 has great potential to be applied in alleviating negative effects of neonicotinoids on the non-target organisms and environment.
研究领域:
环境科学
·
生物学
✓ 已验证
DOI
高影响因子
Agronomy-Basel
·
2024
·Vol. 14
·期 3
·516
·
IF 3.3
Guangchun Xu,Dongdong Yan,Wensheng Fang,Dejin Xu,Lu Xu,Qiuxia Wang,Aocheng Cao
This study investigated the efficacy of three spray adjuvants (Coerce, Wetcit, and Silwet408) in enhancing dinotefuran permeation in rice leaves. Different concentrations of these adjuvants were tested using an external standard method. The rice leaf surface was analyzed by using the van Oss–Chaudhury–Good method to establish a link between surface free energy (SFE) and dinotefuran permeation. All of the adjuvants effectively increased dinotefuran permeation in rice leaves, with the highest permeation of 8.496 mg/kg achieved using Wetcit at 1000 mg/L. The SFE of the rice leaf surface was determined to be 29.28 mJ/m2. A notable correlation was observed between the energy difference (the SFE of the pesticide liquid versus the SFE of the rice leaf surface) and permeation. Various fitting methods, including linear, exponential, logarithmic, polynomial, and power methods, were applied. Polynomial fitting demonstrated the highest coefficient of determination (R2> 0.9000). The relationship between the permeation (y) and energy difference (Δγ) conformed to the polynomial equationy= aΔγ2+ bΔγ + c, where a, b, and c are constants. This model provides a predictive tool for the optimal dosage of spray adjuvants according to target plant characteristics, enhancing the understanding of the interaction between pests and pesticides.
研究领域:
植物保护
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农药科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Xinliang Mei,Xingyu Wang,Wenshuai Huang,Jiaxing Zhu,Kecheng Liu,Xingsheng Wang,Wei Cai,Ruiyin He
The monitoring and the rapid quantification of pesticides and their residues are becoming increasingly important in the field of food safety. Herein, the polycaprolactone/polypyrrole/β-cyclodextrin (PCL/PPy/β-CD) flexible sensor was developed for the electrochemical determination of new neonicotinoid insecticide Dinotefuran (DNF). The morphology, structure, and hydrophilicity of PCL/PPy/β-CD sensor probes were characterized by SEM, FTIR spectroscopy and static contact angle test. Under optimum conditions, the fabricated PCL/PPy/β-CD sensor exhibited excellent electrochemical sensing performance for DNF with a low detection limit of 0.05 μM in the linear concentration range from 0.2 μM to 50 μM and high sensitivity 14.07 μA·μM −1 ·cm −2 , which attributed to the two-stage porous structure, good electron transfer rate and the adsorption effect. The PCL/PPy/β-CD sensor also showed reproducibility (RSD = 4.76%), stability, and high selectivity towards DNF. In addition, a real samples investigation in rice with recoveries of 96.67 % ∼ 103.65 % implied the good application potential of PCL/PPy/β-CD in DNF monitoring.
研究领域:
食品安全
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 9
·3884
·
IF 4.6
Xianjiang Li,Wei Zhang,Xiao Li,Shukun Zhou,Mengling Tu,Yunxiao Zhu,Hongmei Li
Dinotefuran (DNT) belongs to the third-generation neonicotinoid pesticides, which are among the most common residuals in a variety of food commodities. To guarantee accurate quantification and traceability of results in food samples, certified reference materials (CRMs) are the indispensable benchmark. In this work, a DNT CRM was characterized and its purity was assessed by two independent methods, including mass balance (MB) and quantitative nuclear magnetic resonance spectroscopy (qNMR). The mass fraction of moisture was 0.33 mg/g, the inorganic impurity was 0.01 mg/g, and no detectable organic solvent was detected. Benzoic acid was chosen as the internal standard for qNMR. Its mass fraction was 997.9 mg/g and 992.9 mg/g by MB and qNMR, respectively. Eventually, the DNT CRM was assigned a mass fraction of 995 mg/g, with expanded uncertainty of 5 mg/g (k= 2). This CRM can be used to prepare calibrant solutions and is applicable to national routine monitoring of DNT residuals in agro-products and food.Keywords:dinotefuran;certified reference material;mass balance;quantitative nuclear magnetic resonance spectroscopy
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Yijian Zhao,Xiaohan Zheng,Qinzhi Wang,Taotao Zhe,Yaowen Bai,Tong Bu,Meng Zhang,Li Wang
Various pesticides employed in modern agriculture result in large amounts of pesticide residues in agricultural production, greatly threatening human health. Herein, we report a facile approach to fabricate a reduced graphene oxide/cyclodextrin modified glassy carbon electrode (rGO/CD/GCE) for the sensitive electrochemical sensing of imidacloprid (IDP). Three different modified electrodes using CDs ( α -, β -, γ -CD) were fabricated, and their electrochemical performance was further studied. The results demonstrate that α -CD possesses the best signal amplification for IDP. Compared with wet-chemical synthesis of rGO/CDs (W-rGO/CDs), the electrochemical synthesis of rGO/CDs (E-rGO/CDs) produced sensors that showed better performance for IDP sensing. Taking advantage of prepared E-rGO/ α -CD nanocomposite, the fabricated sensor offered a low detection limit (0.02 μM) with a wider linear range (0.5–40 μM) and long-term stability. The new sensor was successfully applied for the detection of IDP in brown rice, providing a new technique for efficient and convenient monitoring of pesticide residues in food.
研究领域:
分析化学
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食品科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2022
·
IF 3.571
Ruixia Li,Taotao Zhe,Mingyan Li,Jingyan Li,Fan Li,Feier Bai,Lihua Li,Kaixuan Ma,Sihan Shen,Li Wang
Imidacloprid (IDP) residue in modern agricultural production seriously endangers human health and environmental safety. The establishment of a rapid and efficient method for the detection of IDP residue can effectively prevent its harm to human health. Herein, we demonstrate the carbon cloth (CC) prepared by a high-temperature annealing strategy possesses enhanced electrochemical performance, which could be directly used in electrochemical IDP sensing. Annealed carbon cloth (ACC) is endowed with higher defects, rougher surfaces, more functional groups, more hydrophilic surface , and increased ion-accessible surface area. Furthermore, the ACC electrode shows superior electrocatalytic reduction activity towards IDP, possessing a wide linear range of 5–100 μM, a low detection limit of 0.04 μM, and high sensitivity of 35.58 μA mM −1 cm −2 . Meanwhile, this sensor can be applied for sensing IDP in grapes and apples with a good recovery of 96.8–104.1%. Compared with other modified electrodes , the ACC electrode has the advantages of no binder, no complicated modification, excellent detection effect, low cost, and easy large-scale production. Consequently, this work designs a self-supporting metal-free electrode with high electrochemical performance, providing a new idea for the development of environmentally friendly IDP sensors.
研究领域:
分析化学
·
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PEST SCIENCE
·
2023
·Vol. 96
·期 3
·1213-1227
·
IF 4.8
Zhang Yan-Chao,Yu Zhi-Tao,Gao Yang,Ye Wen-Nan,Peng Yu-Xuan,Zhang Shuai,Gao Cong-Fen
The brown planthopper (BPH), Nilaparvata lugens (Stål), is a major insect pest of rice in Asia and is mainly controlled with insecticides. Dinotefuran has been commercialized for control of N. lugens in China since 2013; however, the characteristics and mechanisms of resistance to dinotefuran are still unclear. Here, we conducted a long-term (from 2013 to 2021) and large geographical scale (11 provinces) resistance monitoring program for dinotefuran in the BPH in China. Before 2020, field populations of N. lugens have developed moderate resistance to dinotefuran, while since 2020, most field populations of N. lugens have developed high resistance. To develop a better resistance management strategy, a dinotefuran-resistant (Din-R) strain of N. lugens was selected in the laboratory to investigate the inheritance, possible mechanisms of resistance and potential fitness costs. This Din-R strain developed resistance to imidacloprid, nitenpyram and thiamethoxam. The dinotefuran resistance was controlled by multiple genes. RNA interference (RNAi)-mediated suppression of NlCYP6ER1 , NlCYP6CS1 and NlCYP314A1 expression increased the susceptibility of N. lugens to dinotefuran. Transgenic lines of Drosophila melanogaster expressing NlCYP6ER1 or NlCYP314A1 were less susceptible to all four neonicotinoids. Furthermore, the Din-R strain had a relative fitness of 0.64 with a substantially decreased survival rate, emergence rate and fecundity. Collectively, our results showed that dinotefuran resistance was mediated by multiple CYP genes. The high expression of these genes was related to the cross-resistance of N. lugens to other neonicotinoids. This study provided valuable information for facilitating the development of neonicotinoids resistance management strategies.
研究领域:
昆虫学
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害虫管理
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Na Qin,Sunlei Yang,Rui Li,Hongyun Zhan,Lijuan Wang,Fengyun Li,Jingbo Liu
The traditional method of acetamiprid residue detection is difficult to operate, time-consuming and laborious, and requires high professional knowledge of the detection personnel, which can no longer meet the rapid detection in the field. For this reason, a colorimetric aptasensor based on an entropy-catalyzed amplification system was developed for the ultrasensitive and selective determination of acetamiprid. In the absence of acetamiprid, the aptamer and cDNA build a double-stranded structure. The formed hemin/G-quadruplex mimicking DNAzyme can catalyze the substrate ABTS to generate the colored ion ABTS- with the help of H2O2, and the solution turns blue-green. On the contrary, the presence of acetamiprid triggers the release of cDNA, which in turn initiates the entropy-driven system, resulting in the inability to form DNAzyme and therefore no blue-green production of the solution. The quantity of acetamiprid determined the color period. Under the optimal experimental conditions, the method showed a linear correlation (R2=0.9837) for the detection of acetamiprid over the concentration range of 0.1 ~ 100 ng/mL, with a limit of detection of 0.06 ng/mL.The method was used for the determination of acetamiprid in spiked Coix lacryma and bitter almond, with the recoveries in the range of 90.3% ~ 110.3%. The proposed enzyme-free and label-free assay can be developed into a simple, sensitive and rapid detection platform.
研究领域:
分析化学
·
环境科学
·
生物技术
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Ying Wang,Meng Zhang,Tong Bu,Feier Bai,Shuang Zhao,Yuanyuan Cao,Kunyi He,Haiyu Wu,Jia Xi,Li Wang
In this work, a highly sensitive immunochromatographic test strip (ITS) based on Scandium-Tetrakis (4-carboxyphenyl) porphyrin (TCPP) metal–organic framework nanocubes (ScTMNs) was developed for ultrasensitive and facile visual determination of imidacloprid (IDP). TCPP as the porphyrin-based planar ligand and Sc 3+ as the metal center were applied to form the ScTMNs via coordination chelation. Giving the credit to its excellent optical characteristics, strong affinity with monoclonal antibodies, and favorable biocompatibility, the ScTMNs was selected as a signal tag. Under optimized conditions, the ITS exhibited a great liner relationship in the range of 0.04–3 ng/mL and the detection limit was 0.04 ng/mL for the IDP detection. Additionally, IDP was successfully detected in tomatoes, millet, corn and carrot samples with satisfied recoveries. To the best of our knowledge, this is the first time that ScTMNs have been used in immunochromatography which are expected to have potential applications in detection of other substances.
研究领域:
食品科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
·
2022
·
IF 6.652
Chengnan Xu,Mei Lin,Tianyu Wang,Zhoulin Yao,Weiqing Zhang,Xianju Feng
An instruments-free colorimetric assay is established for acetamiprid detection with hybridization chain reaction (HCR)-based amplification strategy. Hairpin probes help gold nanoparticles (AuNPs) to resist salt-induced aggregation through sticky ends. In the presence of acetamiprid, aptamer hairpin probe HP opens due to the specifical recognition, then triggers an explosive hybridization between hairpin probes HA-1/2 and numerous hairpin probes are consumed. With the depletion of hairpin probes, the protection weakens and AuNPs suffer from salt-induced aggregation, which results in a color change from pinkish purplish to blue-purple. Under optimal conditions, the assay exhibits high sensitivity for acetamiprid analysis with a detection limit at 1.74 μM. Meanwhile, the aptasensor displays excellent selectivity that only acetamiprid can trigger the HCR and achieve enhanced detection. Worthwhile, based on the color variation, a smartphone readout-based strategy is proposed for visual quantification of acetamiprid, and good practical performance is obtained in real agricultural samples. The above visual method is portable and economic that get rid of advanced instruments, and shows a promising application prospect for on-site detection of acetamiprid.
研究领域:
分析化学
·
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Pengxi Li,Wangjing Zhai,Qiqi Guo,Xuanyu Zou,Yujue Wang,Yucheng Gu,Xueke Liu,Zhiqiang Zhou,Peng Wang,Donghui Liu
Ammonium sulfate and dinotefuran are widely used in agricultural practices; however, limited knowledge exists regarding the potential risks associated with their co-exposure. In this study, the impact of ammonium sulfate on the degradation of dinotefuran in four soils was investigated, and the formation of the main metabolites UF, DN, MNG, and NG was also determined. The underlying mechanisms were explored by the impact of ammonium sulfate on soil physicochemical properties as well as soil microorganisms. The half-life of dinotefuran sole exposure in soils were determined between 27.47 and 60.05 days. Co-exposure of ammonium sulfate significantly impeded the degradation of dinotefuran, resulting in 1.70–5.05 times longer half-life, reduced the content of the metabolites and changed their composition. Ammonium sulfate induced significant alterations in the structure and dominance of bacterial communities in the soils. The reduced relative abundance of Bacteroidota , Proteobacteria and Chloroflexi phyla related to dinotefuran degradation. Ammonium sulfate also led to a decrease in soil pH and organic matter content, which were negatively correlated with the degradation. PLS-SEM analysis revealed soil microbial diversity had a significant impact on the degradation of dinotefuran. The findings serve as a cautionary note regarding the risks of co-exposure to fertilizers and pesticides.
研究领域:
农业科学
·
环境科学
·
微生物学
·
土壤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）