SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Fu-Rong Xiu,Xue Bai,Yingying Qi,Xiang Gao,Man Zhao
Pesticide residues in agricultural products are serious threat to people's health. Real-time monitoring of pesticides residues in the environment and agricultural products posed challenges to sustainable methods with high analytical performance for pesticide detection. Herein, waste PVC/coal fly ash (the mass ratio of PVC and coal fly ash was 4:1) was dechlorinated in subcritical water at low temperature to achieve nearly 100 % dechlorination of PVC and obtain carbon-based composite materials (CM-Fe/Al/Si-dPVC) with strong sening activity. For CM-Fe/Al/Si-dPVC, C Fe bonding resulted in strong electron migration, and nano/μm SiO 2 and Al 2 O 3 doping in the layered polyene C matrix provided large specific surface area , and silicon hydroxyl created good heterogeneous catalytic interfaces. CM-Fe/Al/Si-dPVC could strongly trigger luminol chemiluminescence (CL) reaction and produce intense CL signals. Neonicotinoid pesticides (acetamiprid and imidacloprid) bonded with CM-Fe/Al/Si-dPVC through coordination chelation and hydrogen bonding , which shielded the catalytic active site and increased the Fermi level of system, thus quenching CL reaction. Inspired by these, a cheap CL assay was constructed for detecting neonicotinoids combinations of acetamiprid and imidacloprid (NICs). The detection limits of NICs were 0.7 ng/L. Satisfactory recoveries were obtained for real agricultural products and environmental samples. The results of life cycle evaluation (LCA) revealed that the strategy had significantly small global warming potential (GWP). This work presented a sustainable method with environmental benefits for the detection of neonicotinoids, and also opened up new way for the recycling of organic solid wastes .
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Yingying Qi,Yiting Chen,Fu-Rong Xiu,Jinxiao Hou
Convenient and practical detection of the ultra-low concentration of single-component pesticide residue in real environmental samples is crucial for the assessment of environmental risks caused by this pesticide. Herein, a simple and rapid colorimetric sensor for the detection of acetamiprid in real environmental samples and agricultural products was constructed by the direct and sensitive response of positively charged gold nanoparticles ((+) AuNPs) to the aptamer structure change induced by acetamiprid. (+) AuNPs’ response to target is direct and sensitive with no need of the salt-induced process. The affinity interaction between aptamer and target is carried out in an isolated and optimized system without interference. Consequently, this colorimetric sensor has high sensitivity. Even with the naked eye, acetamiprid as low as 7.5 × 10 −8 M was observed to cause the color change of (+) AuNPs within minutes. The detection limit of the colorimetric sensor was calculated to be 5.6 × 10 -10 M, which was about one order of magnitude lower than that in (-) AuNPs system and far lower than that of other colorimetric methods. Moreover, it was found that the high specificity of aptamer recognition could withstand the complexity of real samples. Compared with the standard HPLC method, the detection results of the colorimetric analysis have excellent accuracy and reliability. In particular, the processing of the real sample in the colorimetric sensor is much simpler and does not require professional chromatographic separation.
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
ANALYTICAL LETTERS
·
2014
·
IF 1.019
Lei Gao,Chunying Piao,Ligang Chen
Magnetic molecularly imprinted polymers based on carbon nanotubes were prepared and characterized by infrared spectrometry, transmission electron microscopy, and vibrating sample magnetometry and were employed for the isolation of acephate from cabbage, spinach, lettuce, leeks, and celery. Kinetic and recognition studies were carried out in order to investigate the adsorption properties of the polymers. During the application process, the acephate extracted from vegetables was purified with the magnetic molecularly imprinted polymers and determined by high performance liquid chromatography with an ultraviolet detector. The recoveries of acephate at three fortified concentrations (0.015, 0.15, and 1.5 mg kg−1) were between 89.2% and 93.4%. The limits of detection and quantification of acephate were 0.0025 and 0.0077 mg kg−1, respectively. The linear dynamic range was from 0.01 to 5 mg kg−1. The relative standard deviations of intra- and inter-day precision were 1.1% to 5.9% and 2.7% to 6.4%, respectively. The developed method was demonstrated to be rapid and selective for the extraction and determination of acephate in vegetables.
研究领域:
分析化学
·
食品安全
✓ 已验证
DOI
高影响因子
Food Analytical Methods
·
2018
·Vol. 11
·期 9
·2518-2527
·
IF 2.245
Yaseen Tehseen,Sun Da-Wen,Pu Hongbin,Pan Ting-Tiao
In this work, surface-enhanced Raman spectroscopy (SERS) was used with silver colloid substrate for rapid detection of omethoate (an organophosphate pesticide) in standard solution and peach extract. The findings demonstrated that the characteristic wavenumber of the pesticide could be precisely identified using the SERS method. The calibration curve was plotted between concentrations and Raman intensities of the target peak at 1649 cm −1 for the peach extract and at 1647 cm −1 for the standard solution. The coefficients of determination ( R 2 ) of 0.9829 and 0.98 were obtained for standard solution and for peach extract, respectively. The calculated limits of detection for omethoate in standard solution and in peach extracts were 0.001 mg L −1 and 0.01 mg kg −1 , respectively. This study revealed that the proposed method could be used for the analysis of trace contaminants like omethoate in multifaceted food matrices.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
MARINE POLLUTION BULLETIN
·
2024
·
IF 5.3
Xiaochen Hao,Cheng He,Ziru Lian
A novel imprinted composite nanoprobe for fluorescence turn-on recognition of acetamiprid was fabricated and applied to rapidly and sensitively detect trace-level acetamiprid in seawater. The fluorescent probe was prepared using modified fluorescein isothiocyanate as a response unit to improve the sensitivity of signal transmission. The quantitative analysis of acetamiprid was obtained by measuring fluorescence enhancement efficiency of the probe. Under optimal conditions, a good linear relationship with a determination coefficient of 0.9988 was demonstrated in the range of 0–45 μg L −1 and the limit of detection was 1.5 μg L −1 . The developed fluorescence-enhancing nanoprobe was utilized in determination of acetamiprid in seawater samples and achieved recoveries from 96.00 % to 104.00 % with the relative standard deviations <5.88 % ( n = 3). This study offered a promising strategy for simple, reliable and sensitive detection of acetamiprid by embedding fluorescent dye in molecularly imprinted material as highly selective probes.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Yao He,Chunlei Lv,Fulin Li,Yichen Li,Xiangyue Tian,Xi Chen,Qiyu Yang,Juan Su,Daichen Mu
We have designed a sensor based on gold nanoparticles (AuNPs) and aptamers for two pesticides detection. Two complementary paired aptamers have been carefully designed to adsorb onto the surface of AuNPs, serving as binding elements and molecular switches for pesticides. Aptamers not only give AuNPs the ability of colorimetric detection, but also has the ability of fluorescence detection, and AuNPs can improve the stability of aptamers. Thiamethoxam (TMX) and Acetamiprid (ACE) and their corresponding aptamers (Tapt and Aapt) were selected as models. When TMX is added, Tapt can bind to it and trigger the aggregation of AuNPs which can be used as the detection signal of colorimetric detection. When ACE is added, Aapt can bind to it and produce fluorescence. ACE does not cause colorimetric reaction, and TMX does not cause fluorescence. By using both colorimetric and fluorescent detection methods, interference free detection of two targets can be achieved.
研究领域:
分析化学
·
生物传感
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yuexin Wang,Zhen Zhong,Yaseen Muhammad,Hui He,Zhongxing Zhao,Shuangxi Nie,Zhenxia Zhao
Engineering of monodentate ligands induced defects was proposed to modify NH 2 -MIL-88B(Fe) in order to promote its synergetic photo-Fenton catalytic degradation performance for acetamiprid (ACTM) as model neonicotinoid insecticides. Three monodentate ligands with different coordination groups (benzoic acid, pyrrole and pyrrole-2-carboxylic acid) were applied to in-situ induce ligand vacancies on NH 2 -MIL-88B(Fe). Effect of defect coordination mode on its photo-Fenton catalytic performance was investigated through the ACTM degradation reaction. Ligand defects on NH 2 -MIL-88B(Fe) would generate three merits: (1) it can modulate surface properties to enhance adsorption affinity towards ACTM; (2) it can introduce large amount of monodentate ligands and ligand vacancies in MOFs to promote light absorption and electron-hole separation capacity for photo-catalysis; (3) it can increase the amount of Fe Lewis acid sites to improve redox capacity of Fe 2+ /Fe 3+ for Fenton-catalysis. In this work, Pyrrole-2-carboxylic acid (Pac) was proved to introduce more monodentate ligands in MOFs and generate more ligand vacancies as well. As a result, ACTM can be easily captured by defective NH 2 -MIL-88B(Fe) and degraded by in-situ triggered oxidative reaction through the synergistic “photo-Fenton catalysis”. Performance measurements showed that Pac-MIL88(Fe) achieved 7.3 times higher adsorption rate and 5.5 times higher catalytic rate for ACTM than that of pristine MIL88(Fe). Moreover, total organic carbon (TOC) conversion reached 97.0% within only 90 min using Pac-MIL88(Fe) as photo-Fenton catalyst, showing 1.7 times higher than pristine MIL88(Fe). Thus, the in-situ fabrication of ligand defect-containing MIL88(Fe) can be foreseen of potential for designing new MOFs for wider practical applications.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Kai Zhang,Liangzi Wang,Jingitao liu,Shiyu Zhao,Longfei Ding,Binhua Zhou,Bo Zhao
Despite the harmful effects of organophosphorus pesticides (OPPs), few rapid detection methods of OPPs multi-residue have been practically applied; thus, it is important to improve existing methods and develop rapid detection methods and techniques. Reduced graphene oxide-chitosan (RGO-CHI)/methamidophos electrochemical biosensor was developed to detect multiple OPPs based on the principle of acetylcholinesterase (AChE) activity inhibition in the presence of OPPs. One OPP (methamidophos) that can combine with AChE in the incubation solution was immobilized on the electrode. The proposed method shows good linear relationships of nine OPPs and methomyl, a carbamate pesticide, with limits of detection between 0.05 and 0.52 ppb, indicating high accuracy for the application in real sample detection.
研究领域:
分析化学
·
环境科学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Mingsha Jie,Amei Zhu,Bing Zhu,Jiaxin He,Shengkai Lan,Xingang Lang,Yanhong Bai
Sensitive detection of acetamiprid (ACE) is valuable for human health and food security. Herein, a ratiometric fluorescent sensor based on AIE nanoparticles and nitrogen-doped carbon dots (luminol–Eu–NCDs) can sensitively and selectively detect ACE. luminol–Eu–NCDs were synthesized by the self-assembly of luminol–Eu nanoparticles (luminol–Eu NPs) by Eu3+ and luminol using the aggregation-induced emission (AIE) strategy while covalently linking to nitrogen-doped carbon dots (NCDs) synthesized using Listeria monocytogenes. In the presence of ACE, the fluorescence intensity at 542 nm decreased, with a slight decrease also observed at the 430 nm reference signal. Thus, the concentration of ACE can be accurately monitored by measuring ratiometric fluorescence emitted at 430 nm (F430) and 542 nm (F542) wavelengths. The luminol–Eu–NCD ratiometric fluorescent sensor design reduces errors stemming from environmental influences, thereby improving the sensor's overall accuracy. Optimal conditions yielded a fluorescence intensity ratiometric assay (F430/F542) with a detection limit of 89 ng mL−1 for ACE (S/N = 3), exhibiting a good linear response over the concentration range of 0.1–100 μg mL−1. The present method has been effectively used for the quantitative determination of ACE in rice and has shown remarkable anti-interference and reliability, which has important significance to ensure the safety of rice. This work presents a quick and efficient method for the sensitive detection of ACE contamination in grain food.
研究领域:
食品科学
·
分析化学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xiaoxiao Dong,Chang Lu,Shuaijie Guo,Siqi Zhang,Xuelian Hu,Wenliu Wang,Yiwei Tang,Shuo Wang,Xiuying Liu
A magnetic NiFe 2 O 4 @TiO 2 @Au composite was successfully synthesized via layer-by-layer assembly approach and exhibited excellent SERS performance. The composite was functionalized with an aptamer modified with Cy3, serving as the Raman signal reporter, and was hybridized with complementary DNA oligonucleotides (cDNA) to construct the NiFe 2 O 4 @TiO 2 @Au@ssDNA SERS aptasensor. This aptasensor enabled the development of a sensitive, specific, and straightforward SERS assay for acetamiprid detection, exhibiting good accuracy. Under optimized conditions, an inverse correlation was established between the acetamiprid concentration and the Raman intensity at the characteristic peak of 1132 cm −1 , spanning a range of 10 −1 -10 4 nmol/L with a LOD of 8.4 × 10 −1 pmol/L. Standard addition experiments to three types of leafy vegetables samples yielded recoveries ranging from 94.30 % to 111.83 %, with a relative standard deviation of <5.56 %. This method shows potential for detecting other hazardous substances in food and environmental samples by simply changing the corresponding aptamers and cDNA.
研究领域:
分析化学
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qing Li,Yingqiang Fu
Fipronil (FIP) and acephate (ACE) are highly toxic insecticides that pollute the environment and pose a health hazard, potentially being carcinogenic or teratogenic. Excess Fe 3+ can trigger oxidative stress and lead to organ damage. Conventional fluorescent probes can only be used for single detection, and the development of multi-target simultaneous detection methods is imminent. In this work, brilliant cresyl blue modified carbon quantum dots (B-CQDs) were synthesized using a simple one-step hydrothermal method. It was found that B-CQDs can sequentially detect multiple substances under certain conditions. Firstly, the fluorescence of B-CQD increases with the concentration of insecticide FIP, and decreases with the addition of Fe 3+ . After activation treatment with EDTA and Zn 2+ solutions, the fluorescence intensity of the system increases with the concentration of insecticide ACE. A fluorescent probe was established based on the above experimental phenomena to achieve sequence detection of FIP, Fe 3+ , and ACE, with the lower limits of detection (LODs) being 0.078 μM, 0.013 μM, and 0.055 μM, respectively. Therefore, the new method of sequence detection for multiple pesticide residues developed in this study shows great potential for application in environmental pesticide residue detection.
研究领域:
环境科学
·
分析化学
·
纳米技术
·
毒理学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2019
·
IF 5.399
Shizhuang Weng,Wenxiu Zhu,Pan Li,Hecai Yuan,Xueyan Zhang,Ling Zheng,Jinling Zhao,Linsheng Huang,Ping Han
Dynamic surface-enhanced Raman spectroscopy ( D -SERS) was employed for the rapid detection of acephate in rice with simply regulated gold nanorods. Gold nanorods modified with cysteamine were prepared to circumvent the weak affinity of acephate molecules to the gold surface for a gigantic and stable enhancement. D -SERS was adopted to measure spectra of acephate residue at a range of 100.2–0.5 mg/L in rice samples, and the low residue of 0.5 mg/L can be still detected. Multivariant methods in machine or deep learning were used to develop the regression models for the automatic analysis of acephate residue level. Partial least squares regression and principal component analysis obtained the optimal performance with the root-mean-square error (RMSE) of validation of 5.4776, coefficient of determination (R 2 ) of validation of 0.9560, RMSE of prediction of 6.2845, and R 2 of prediction of 0.9541. Thus, the proposed method provides accurate and sensitive detection for acephate in rice.
研究领域:
分析化学
·
食品科学
·
环境科学
✓ 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）