FOOD CHEMISTRY
·
2019
·
IF 5.399
Qianqian Wang,Lingfang Yao,Lei Hao,Yun Li,Chun Wang,Qiuhua Wu,Zhi Wang
Ferrocene-based nanoporous organic polymer (Fc-NOP) was used as solid-phase extraction (SPE) adsorbent and showed excellent adsorption capacity for chlorophenols (CPs) compared with commercial C18 and multi-walled carbon nanotubes. Then, a SPE method with Fc-NOP packed cartridge combined with HPLC-UV detection was developed to determine CPs in tap water, black tea drinks and peach juice samples. Under optimal conditions, the detection limits of the method measured at the signal to noise ratio of 3 (S/N = 3) were 0.04–0.06 ng mL −1 for tap water and 0.10–0.20 ng mL −1 for black tea drinks and peach juice samples. Satisfactory method recoveries were achieved in the range of 87.6–119% with relative standard deviations of 3.11–7.83%. Result proved that this method was a sensitive and efficient method for determination of trace CPs in foods. The extraction result for more other compounds confirmed that the developed method had a great application potential for analysis of other trace pollutants in food samples.
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Shuyue Ren,Qiaofeng Li,Jingyi Wang,Bingyan Fan,Jialei Bai,Yuan Peng,Shuang Li,Dianpeng Han,Jin Wu,Jiang Wang,Kang Qin,Zunquan Zhao,Baoan Ning,Tie Han,Huanying Zhou,Zhixian Gao
A rapid and ultrasensitive method for colourimetric/photothermal dual-readout detection was developed using an 808 nm NIR laser and a thermal imaging app on mobile phone. Norfloxacin was used as a model contaminant to demonstrate this universal rapid detection method. It is innovatively, to use the advanced two-dimensional material black phosphorus as a colourimetric/photothermal reagent for the first time. The samples were added to the strip, and the analytes were selectively captured on the conjugate pad by monoclonal antibody-modified magnetic/upconversion nanocomposites . The samples flowed through the strips by capillary action until reaching the control line, where immune complex formation occurred due to the presence of secondary antibody. The added black phosphorus could be captured by the the antigens which were directly exposed to the test line and a brown band could be observed by naked eye. Upon illumination by NIR light for 1 min, the real-time temperature is obtained for quantitative analysis through the thermal imaging performed by mobile phone camera. This method can achieve the detection of norfloxacin in water samples within 20 min, and the detection limits of colorimetric and photothermal readout can reach 45 pg mL −1 . Compared with conventional strips, this method provided an increased sensitivity by about two orders of magnitude, with a integrated portable laser and a mobile phone. It is a valuable method for rapid detection and can be applied to other environmental contaminants as well.
研究领域:
环境科学
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分析化学
·
纳米技术
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DOI
PubMed
高影响因子
Microsystems & Nanoengineering
·
2022
·Vol. 8
·期 1
·1-12
·
IF 8.006
Yin Jiawen,Gao Wanlei,Yu Weijian,Guan Yihua,Wang Zhenyu,Jin Qinghui
Free chlorine is one of the key water quality parameters in tap water. However, a free chlorine sensor with the characteristics of batch processing, durability, antibiofouling/antiorganic passivation and in situ monitoring of free chlorine in tap water continues to be a challenging issue. In this paper, a novel silicon-based electrochemical sensor for free chlorine that can self-clean and be mass produced via microfabrication technique/MEMS (Micro-Electro-Mechanical System) is proposed. A liquid-conjugated Ag/AgCl reference electrode is fabricated, and electrochemically stable BDD/Pt is employed as the working/counter electrode to verify the effectiveness of the as-fabricated sensor for free chlorine detection. The sensor demonstrates an acceptable limit of detection (0.056 mg/L) and desirable linearity ( R 2 = 0.998). Particularly, at a potential of +2.5 V, hydroxyl radicals are generated on the BBD electrode by electrolyzing water, which then remove the organic matter attached to the surface of the sensor though an electrochemical digestion process. The performance of the fouled sensor recovers from 50.2 to 94.1% compared with the initial state after self-cleaning for 30 min. In addition, by employing the MEMS technique, favorable response consistency and high reproducibility (RSD < 4.05%) are observed, offering the opportunity to mass produce the proposed sensor in the future. A desirable linear dependency between the pH, temperature, and flow rate and the detection of free chlorine is observed, ensuring the accuracy of the sensor with any hydrologic parameter. The interesting sensing and self-cleaning behavior of the as-proposed sensor indicate that this study of the mass production of free chlorine sensors by MEMS is successful in developing a competitive device for the online monitoring of free chlorine in tap water.
研究领域:
环境科学
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材料科学
·
传感器技术
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PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2023
·Vol. 23
·期 4
·3475-3484
·
IF 4.3
Jiawen Yin,Wei Chen,Wanlei Gao,Xin Zhang,Bo Tang,Qinghui Jin
Considering the indispensable of pH for tap water, a pH sensor with the characteristics of an implantable, long-term stable, and long lifetime is urgently needed for on-line and in situ pH monitoring in tap water, but this is always a challenging issue. In this article, a competitive integrated electrochemical pH sensor is developed and batch manufactured via micro-electro-mechanical system (MEMS). A dense and ultrasensitive IrOx electrode is obtained for almost 1.5 times Nernst response (−82.88 mV/pH), after preparation process optimization. A Si-Si3N4-KCl agar gel-polydimethylsiloxane (PDMS) multilayer structured Ag/AgCl electrode is designed and proven to be a long lifetime (>40 days) and be stable. By integrating with the IrOx film and solid-state Ag/AgCl electrode on a mini chip and verifying the effectiveness of the as-fabricated sensor by pH detection, the miniature pH sensor demonstrates wide detection range (1.8–12), stirring sensitivity, desirable linearity ( ${R}^{2}=0.999$ ), ideal repeatability and good resistance to other interference substances. Particularly, by employing the mass-production technique, favorable response consistency (relative standard deviation (RSD) < 2%) is witnessed, offering the opportunity to mass-produce the proposed sensor in the future. What’s more, the sensor still kept 91.7% sensitivity when compared to the sensitivity obtained at its initial state, after continuously operating for 32 days. Undoubtedly, the sensitive, durable, miniaturized, and mass-produced pH sensor proposed in this article is a competitive device to implant into the water pipeline for pH in situ online monitoring.
研究领域:
生物医学工程
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微纳传感技术
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环境监测
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电化学传感器
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转化医学
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水质分析
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植入式器件
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高影响因子
Toxics
·
2024
·Vol. 12
·期 4
·247
·
IF 3.9
Siyuan Liu,Jing Liu
The safety of drinking water is a significant environmental issue of great concern for human health since numerous contaminants are often detected in drinking water and its sources. Boiling is a common household method used to produce relatively high-quality drinking water in some countries and regions. In this study, with the aid of an integrated approach of in vitro bioassays and non-target analysis based on high-resolution mass spectrometry coupled with liquid chromatography, alterations in endocrine-disrupting activities in tap water samples without and with boiling were revealed, as well as the potential endocrine-disrupting chemicals (EDCs) contributing to these alterations were identified. The organic extracts of tap water had no significant (ant)agonistic activities against an estrogen receptor (ER), progesterone receptor (PR), glucocorticoid receptor (GR), and mineralocorticoid receptor (MR) at enrichment concentrations of ≤10 times, posing no immediate or acute health risk to humans. However, the presence of agonistic activities against PR and MR and antagonistic activities against ER, PR, GR, and MR in OEs of tap water at relatively higher enrichment concentrations still raise potential health concerns. Boiling effectively reduced antagonistic activities against these steroid hormone receptors (SHRs) but increased estrogenic and glucocorticoid activities in drinking water. Four novel potential EDCs, including one UV filter (phenylbenzimidazole sulfonic acid, PBSA) and three natural metabolites of organisms (beta-hydroxymyristic acid, 12-hydroxyoctadecanoic acid, and isorosmanol) were identified in drinking water samples, each of which showed (ant)agonistic activities against different SHRs. Given the widespread use of UV filters in sunscreens to prevent skin cancer, the health risks posed by PBSA as an identified novel EDC are of concern. Although boiling has been thought to reduce the health risk of drinking water contamination, our findings suggest that boiling may have a more complex effect on the endocrine-disrupting activities of drinking water and, therefore, a more comprehensive assessment is needed.
研究领域:
环境科学
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毒理学
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分析化学
·
公共卫生
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ming Sun,Li Zhang,Shaobin Li,Fengbo Li,Yu Han,Tingting Yu,Zixu Lin
Hydroquinone is an organic pollutant that poses significant risks to the environment and human health, rapid and effective monitoring is essential. In this work, a simple and efficient electrochemical sensor based on poly(3,4-ethylenedioxythiophene) coated onto a bimetallic metal-organic framework (ZnCo-ZIF-67) was constructed by using an in-situ polymerization strategy at room temperature. The electrochemical sensor demonstrates excellent performance with a broad linear range (2–212 μM, 212–662 μM), high sensitivity (0.51 μA·μM −1 ·cm −2 ), and a low limit of detection of 0.468 μM. The sensor exhibits excellent selectivity, repeatability, reproducibility, and anti-interference performance. Moreover, it effectively detects hydroquinone in both tap water and industrial wastewater, achieving recoveries ranging from 97.30 % to 102.83 %, with relative standard deviations (RSD) below 3.80 %. These results highlight the significant potential of the sensor for monitoring hydroquinone in environmental water systems.
研究领域:
环境科学
·
分析化学
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高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 26
·3256-3262
·
IF 2.073
Pan Li,Jiawei Li,Minghong Bian,Danqun Huo,Changjun Hou,Ping Yang,Suyi Zhang,Caihong Shen,Mei Yang
In this paper, we developed a label-free fluorescence assay employing BSA-Au NCs, S2O32−, and 2-ME for the highly selective and sensitive detection of Pb2+ in sorghum, river water and tap water. When the BSA-Au NCs reacted with S2O32− in solution, Au(S2O3)23− complexes were formed immediately on the surfaces of BSA-Au NCs. After adding Pb2+ and 2-ME, the BSA-Au NCs rapidly dissolved to form Au–S complexes. As a result, the fluorescence intensity decreased dramatically, allowing quantification of Pb2+ in the aqueous solution. This reaction is highly specific under optimal detection conditions. A good linear relationship between the fluorescence intensity and the concentrations of Pb2+ could be obtained in the range of 10 to 1000 nM (R2 = 0.9910), with a detection limit (LOD; S/N ratio = 3) down to 1.043 nM. Significantly, compared with other studies, we greatly shortened the reaction time by substantial improvements in materials. On the basis of the above-mentioned work, we successfully immobilized S2O32− modified BSA-Au NCs on wax-printed papers to achieve the purpose of simple and real-time field monitoring of Pb2+. We picked up R-values (the red value of the RGB color model) from captured flurescence images under UV light (365 nm) and acquired a linear correlation between R-values and Pb2+ concentrations. This linear correlation exhibits the great potential of this approach. The proposed probe also showed satisfactory selectivity as well as excellent reproducibility. Multiple real sample experiments showed the tremendous prospect of this method, as well.
研究领域:
分析化学
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环境科学
·
食品科学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Shan Huang,Jiandong Yao,Xu Chu,Yi Liu,Qi Xiao,Yue Zhang
Evaluation of acetylcholinesterase (AChE) activity and determination of organophosphorus pesticides (OPs) are of great importance for the clinical diagnosis of several serious diseases correlated with their variations in human blood serum. In this study, a highly selective and sensitive ratiometric fluorescent probe was innovatively fabricated for the evaluation of AChE activity and the determination of OPs in tap water and food on the basis of the inner filter effect (IFE) between nitrogen-doped carbon dots (N-CDs) and 2,3-diaminophenazine (DAP). N-CDs were synthesized via a one-pot hydrothermal method by using pancreatin and 1,2-ethanediamine as precursors. N-CDs showed excellent fluorescence properties and negligible cytotoxicity on human cervical carcinoma HeLa cells and human embryonic kidney 293T cells, suggesting their further biological applications. Upon the addition of AChE and choline oxidase, acetylcholine was catalyzed to produce choline that was further oxidized to produce H2O2. In the presence of horseradish peroxidase, o-phenylenediamine reacted with H2O2 to produce fluorescent DAP. Therefore, a ratiometric fluorescent probing platform existed via IFE between N-CDs with a fluorescence signal at 450 nm and DAP with a fluorescence signal at 574 nm. OPs irreversibly impeded the catalytic activity of AChE, finally leading to the decrease of DAP amount and the variation of ratiometric fluorescent signal. Under optimal conditions, such a fluorescent probe showed relatively low detection limits of 0.38 U/L for AChE, 3.2 ppb for dichlorvos, and 13 ppb for methyl-parathion. Practical application of this ratiometric fluorescent probe to detect OPs was further verified in tap water and food samples with satisfying results that were highly consisted with the results obtained by GC–MS.
研究领域:
生物化学
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医学诊断
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环境科学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Yu Wang,Qianzhan Yang,Huadong Zhang,Zhenghong Wang,Ailin Wu,Yun Luo,Qianru Zhou
Background The ongoing infusion of pharmaceutical and personal care products (PPCPs) into ecosystems sustains a perpetual life cycle and leads to multi-generational exposures. Limited understanding of their environmental impact and their intrinsic ability to induce physiological effect in humans, even at low doses, pose great risks to human health. Few scholarly works have conducted systematic research into the occurrence of PPCPs within potable water systems. Concurrently, the associated monitoring techniques have not been comprehensively examined with regards to the specific nature of drinking water, namely whether the significant presence of disinfectants may influence the detection of PPCPs. Results A modified approach in terms of detailed investigation of sample preservation and optimization of an in-lab fabricated solid phase extraction (SPE) cartridge filled with DVB-VP and PS-DVB sorbent was proposed. Favorable methodological parameters were achieved, with correlation coefficients spanning from 0.9866 to 0.9998. The LODs of the PPCPs fluctuated from 0.001 to 2 μg L −1 , while the LOQs varied from 0.002 to 5 μg L −1 . The analysis of spiked samples disclosed a methodological precision of 2.31–9.86 % and a recovery of 52.4–119 %. We utilized the established method for analyzing 14 water samples of three categories (source water, finished water and tap water) from five centralized water supply plants. A total of 24 categories encompassing 72 PPCPs were detected, with the concentrations of PPCPs manifested a marked decrease from source water to finished water and finally to tap water. Significance Our research meticulously examined the enhancement and purification effects of widely used commercial SPE cartridges and suggested the use of in-lab fabricated SPE cartridges packed with DVB-VP and PS-DVB adsorbents. We also conducted a systematic evaluation of the need to incorporate ascorbic acid and sodium thiosulfate as preservatives for PPCP measurement, in consideration of the unique characteristics of drinking water matrices, specifically, the significant concentration levels of disinfectants. Furthermore, the proposed method was effectively employed to study the presence of PPCPs in source water, finished water, and tap water collected from centralized water supply plants.
研究领域:
环境科学
·
分析化学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 32
·12563-12569
·
IF 3.069
Huixiao Duo,Xiaofeng Lu,Shuai Wang,Licheng Wang,Yong Guo,Xiaojing Liang
Herein, a novel, fusiform-like magnetic metal–organic framework material (Fe3O4-NH2@MOF-235) was fabricated by a facile two-step solvothermal approach. Then, Fe3O4-NH2@MOF-235 was applied as an adsorbent in magnetic solid-phase extraction (MSPE) coupled with high-performance liquid chromatography (HPLC) for the simultaneous extraction and determination of five kinds of benzoylurea insecticides (flufenoxuron, chlorbenzuron, teflubenzuron, diflubenzuron and triflumuron) from honey, fruit juice and tap water samples. Moreover, potential variables influencing the MSPE efficiency were optimized. Under the optimized conditions, an excellent linearity was achieved in the range of 1.0–300.0 μg L−1 for teflubenzuron and flufenoxuron and 2.0–300.0 μg L−1 for diflubenzuron, chlorbenzuron and triflumuron, with the correlation coefficients of 0.9991–0.9995. The limits of detection for the analytes were 0.25–0.5 μg L−1, and the recoveries at three fortified concentration levels ranged from 76.45% to 90.74% for the honey samples, 79.95–95.27% for the fruit juice samples, and 84.02–99.62% for the tap water samples. The π–π stacking and hydrophobic interactions between Fe3O4-NH2@MOF-235 and the analytes played an important role in the adsorption process. Moreover, maximum adsorption could be achieved within 5 minutes with very little adsorbent for all the samples. Therefore, the magnetic Fe3O4-NH2@MOF-235 composite combined with MSPE is a convenient approach to detect benzoylurea insecticides in actual samples.
研究领域:
分析化学
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环境科学
·
食品科学
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产品关联
DOI
高影响因子
TALANTA
·
2026
·
IF 6.7
Xiaojie Zhao,Chuanyun Peng,Rong He,Yinxia Wang,Chunlai Wu,Yong Feng,Shijian Pan,Chaoran Xue
Bisphenols (BPs) are typical environmental endocrine disruptors with potential toxicity and health risks. It is urgent to develop sensitive analytical methods for their trace detection. In this work, a covalent organic framework composite material modified with ionic liquids (COF-IL) was gently synthesized through quaternization and Click reactions, and utilized as the packing adsorbent for pipette tip solid phase extraction (PT-SPE) of BPs from bottled beverages and tap water. For COF-IL, the BET surface area was determined to be 423.9837 m 2 ·g −1 and the maximum adsorption capacity for four BPs increased from 111.11 mg·g −1 to 416.67 mg ·g −1 . Due to the appropriate pore size of COF-IL and the integration of π-π conjugation, hydrogen bond interaction, polar and dipole interaction and dispersion interaction, the presented PT-SPE-HPLC method showed wide linear ranges (0.001-100 μg·L −1 for BPA, BPAF and BPZ, and 0.002-100 μg ·L −1 for BPAP, R 2 ≥ 0.9953) and low limits of detection (0.00006-0.0006 μg·L −1 ) for BPs. The intra-day and inter-day RSDs were 0.57%–5.06% and 1.30%–4.28%, respectively. After 60 successive PT-SPE cycles, neither the recoveries of BPs nor the structure of COF-IL showed any significant changes. The developed method was further applied to cola, orange juice and tap water samples, achieving recoveries ranging from 72.76% to 119.13% with RSDs less than 6.03% and matrix effect ranging from 80.33% to 119.44%. Due to its simplicity, convenience, accuracy, and sensitivity, this sample preparation method could be used for detecting and monitoring BPs residues in bottled beverages and tap water.
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高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Huihui Lei,Junxia Wang,Yueying Sun,Zhijuan Wu,Xiaofei Wang,Yawei Wang,Xuedong Wang
As a typical organophosphorus flame retardant, tris(2-chloroethyl) phosphate (TCEP) is refractory in aqueous environment. The application of TAP is a promising method for removing pollutants. Herein, the removal of TCEP using TAP was rigorously investigated, and the effects of some key variables were optimized by the one-factor-at-a-time approach. To further evaluate the interactions among variables, the response surface methodology (RSM) based on central composite design was employed. Under optimized conditions (pH 5, [PS] 0 : [TCEP] 0 = 500:1), the maximum removal efficiency (RE) of TCEP reached up to 90.6%. In real-world waters, the RE of TCEP spanned the range of 56%− 65% in river water, pond water, lake water and sanitary sewage. The low-concentration Cl - (0.1 mM) promoted TCEP degradation, but the contrary case occurred when the high-concentration Cl - , NO 3 - , CO 3 2- , HCO 3 - , HPO 4 2- , H 2 PO 4 - , NH 4 + and humic acid were present owing to their prominently quenching effects on SO 4 •- . Both EPR and scavenger experiments revealed that the main radicals in the TAP system were SO 4 •- and •OH, in which SO 4 •- played the most crucial role in TCEP degradation. GC-MS/MS analysis disclosed that two degradation products appeared, sourcing from the replacement, oxidation, hydroxylation and water-molecule elimination reactions. The other two products were inferred from the comprehensive literature. As for acute toxicity to fish, daphnid and green algae, product A displayed the slightly higher toxicity, whereas other three products exhibited the declining toxicity as compared to their parent molecule. These findings offer a theoretical/practical reference for high-efficiency removal of TCEP and its ecotoxicological risk evaluation.
研究领域:
环境科学
·
毒理学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）