ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Ningyi Chen,Shuang Wu,Bingjun Pan,Zhichao Yang,Bingcai Pan
Advanced techniques for nickel (Ni(II)) removal from polluted waters have long been desired but challenged by the diversity of Ni(II) species (most in the form of complexes) which could not be readily discriminated by the traditional analytical protocols. Herein, a colorimetric sensor array is developed to address the above issue based on the shift of the UV–vis spectra of gold nanoparticles (Au NPs) after interaction with Ni(II) species. The sensor array is composed of three Au NP receptors modified by N-acetyl-l-cysteine (NAC), tributylhexadecylphosphonium bromide (THPB), and the mixture of 3-mercapto-1-propanesulfonic acid and adenosine monophosphate (MPS/AMP), to exhibit possible coordination, electrostatic attraction, and hydrophobic interaction toward different Ni(II) species. Twelve classical Ni(II) species were selected as targets to systematically demonstrate the applicability of the sensor array under various conditions. Multiple interactions with Ni(II) species were evidenced to trigger the diverse Au NP aggregation behaviors and subsequently produce a distinct colorimetric response toward each Ni(II) species. With the assistance of multivariate analysis, the Ni(II) species, either as the sole compound or as mixtures, can be unambiguously discriminated with high selectivity in simulated and real water samples. Moreover, the sensor array is very sensitive with the detection limit in the range of 4.2 to 10.5 μM for the target Ni(II) species. Principal component analysis signifies that coordination dominates the response of the sensor array toward different Ni(II) species. The accurate Ni(II) speciation provided by the sensor array is believed to assist the rational design of specific protocols for water decontamination and to shed new light on the development of convenient discrimination methods for other toxic metals of concern.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Hong Yu,Chen Wang,Xinhe Xiong,Bitao Dai,Yang Wang,Zhijie Feng,Hao luo,Jiangxiong Zhu,Guoqing Shen,Yun Deng,Xueqing Geng,Danfeng Wang,Lumei Wang
Acetamiprid (Ace), extensively employed in agricultural production as a substitute for organophosphorus pesticides, poses a potential threat to the environment and human health due to excessive residues. Hence, the development of reliable and convenient techniques to determine Ace levels in the environment holds significant importance. Among various assay methods, nanomaterial-based aptamer-based biosensors (aptasensors) have emerged as efficient and promising tools. In this study, we successfully developed a novel aptasensor for monitoring Ace in the environmental water, utilizing advanced nanomaterials known as Fe-N-C single-atom nanozymes (SAzymes). Fe-N-C SAzymes exhibited excellent catalytic activity, high stability, and complete atom utilization. A facile dual-confinement route was employed for the synthesis of Fe-N-C SAzymes, and their performance as oxidase-like nanozymes was investigated. The synthesized Fe-N-C SAzymes presented distinct oxidase-like activity and demonstrated the capability to interact with a chromogenic indicator-TMB, serving as the signal transduction element in our assay. Furthermore, we found that thiol-modified aptamers could effectively dampen the oxidase-like activity of Fe-N-C SAzymes.Therefore, we successfully developed a Fe-N-C SAzymes assisted detection method for Ace, which exhibited high sensitivity (LOD = 16.9 nM) and selectivity. Overall, this work provides new insights into the design of multifunctional Fe-N-C SAzymes for environmental and biological applications.
研究领域:
环境科学
·
生物技术
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 6
·661-671
·
IF 3.532
Ming Gao,Xiaofan Zhang,Sai Ma,Junxia Wang,Marcus Mammah,Liyang Du,Xuedong Wang
Herein, an ionic-liquid-based effervescence-enhanced magnetic solid-phase extraction (ILE-MSPE) approach for the extraction/concentration of organophosphorus pesticides in waters is reported with high stability and portability for rapid sample pretreatment in the field. The ionic-liquid-based magnetic effervescent tablet, composed of magnetic nanoparticles (Fe3O4), sodium carbonate (Na2CO3) as an alkaline source, and an ionic liquid ([C6MIM][PF6]), played triple functions: extractant, dispersant, and retrieving agent. Based on the one-factor-at-a-time method, the important variables for the ILE-MSPE approach were optimized as follows: as an extractant, 70 μL of [C6MIM][PF6]; molar ratio of alkaline to acidic sources (Na2CO3 : H2C4H4O6) as 1 : 1; and mass of magnetic nanoparticles (MNPs) of 30 mg. By integrating HPLC-DAD detection, the ILE-MSPE approach offered the limits of detection of 0.14–0.22 μg L−1 and fortified recoveries of 81.4–97.6% for three representative species (methamidophos, phoxim, and parathion) in water samples. The relative standard deviations were lower than 4.9% for both the intra-day and inter-day precision. Overall, the newly developed method is environmentally benign, time-saving, and feasible for outdoor application.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Wen Liu,Xiaoyan Wang,Yunqing Wang,Jinhua Li,Dazhong Shen,Qi Kang,Lingxin Chen
Ratiometric fluorescence sensors can provide more accurate analysis of target objects because of their self-calibration function. Traditional methods often use steps of chemical coupling with two different fluorescent materials as the dual emission source, which make the construction process complicated and hard to control. Here, we report a convenient and effective way to construct a ratiometric fluorescence sensor based on dual-emission carbon dots-gold nanoclusters (C–AuNCs) functionalized with dithiothreitol (DTT) for the sensitive detection of mercury ions (Hg 2+ ) in water samples. As a type of novel nanoparticle, C–AuNCs are synthesized via microwaving a mixture of gold seeds solution and carbon precursor. In the presence of Hg 2+ , the free thiol group of DTT would attract them around the surface of C–AuNCs, and owing to the strong 5d 10 –5d 10 metallophilic interactions between Hg 2+ and Au + , the fluorescence emission at 598 nm is quenched while the emission at 466 nm remains at a constant intensity. Thus, an obvious color change from orange-red to blue under ultraviolet irradiation can be observed by the naked eye. Moreover, the as-prepared fluorescence sensor has high sensitivity with a detection limit of 8.7 nM, and successfully applies to detect Hg 2+ in real water samples with satisfactory recoveries at three spiking levels ranging from 95.9 − 103.5%. The good results imply that the developed DTT/C–AuNCs sensor is conducive to trace Hg 2+ determination and possesses the great application potential for water-quality monitoring.
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Yufei Lei,Qi Li,Qian Li,Dongxiu He,Jinhua Xue,Lifu Liao,Jikai Wang,Xilin Xiao
In this paper, nitrogen-doped carbon dots (NCDs) were synthesized via a facile hydrothermal method using gum arabic (GA) and tris(hydroxymethyl)methyl aminomethane (tris) as precursors. The resultant NCDs show uniform size distribution and stable optical performance. Then a fluorescent signal quenching probe based on NCDs was proposed for the quantitative detection of mercury ions (Hg2+). The developed fluorescent nanoprobe based on NCDs demonstrated a good linear relationship in the range of 10 to 120 μM (R2 = 0.99265) for toxic mercury(II), with a detection limit of 4.87 μM. Additionally, the present assay system could be efficiently used for the detection of Hg2+ in real water samples with a satisfactory recovery rate (96.11–104.04%). The metal-free NCDs, which exhibited little cytotoxicity, were successfully applied to in vitro fluorescence imaging of human triple negative breast cancer (TNBC) cells, achieving visualization of Hg2+ in cells. With good water solubility and biocompatibility, the nitrogen-doped carbon dots synthesized by this economical and ecologically friendly process are suitable for use in analytical testing and biological research.
研究领域:
分析化学
·
生物医学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IMMUNOLOGICAL INVESTIGATIONS
·
2012
·
IF 1.164
Xiaoling Wu,Libing Wang,Wei Ma,Yingyue Zhu,Liguang Xu,Hua Kuang,Chuanlai Xu
A rapid, sensitive, specific and simple method based on Fluorescence Polarization Immunoassay (FPIA) was developed for the quantitative detection of Bisphenol A in water. 4, 4-Bis (4-hydroxyphenyl) valeric acid (BHPVA) was selected as the hapten to produce the immunogen. Fluorescein-labeled Bisphenol A derivatives (tracers) with different structures were synthesized and purified by thin layer chromatography. Based on the polyclonal antibody and tracers, an optimized FPIA method was developed with a detection limit (10% inhibition) of 2 μg L−1 and a linear working range of 20 to 800 μg L−1. FPIA was suitable for screening a large number of samples. The recoveries of fortified Tai lake water samples ranged from 91.85 to 102.78%, and tap water samples ranged from 90.36 to 96.01%. The coefficients of variation were all less than 20%. This FPIA method, which did not require a complicated cleanup process, proved to be very useful for the screening of Bisphenol A in environmental water samples.
研究领域:
环境科学
·
免疫学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2016
·Vol. 31
·期 6
·1187-1193
·
IF 1.452
Lei Wang,Wei Li,Feiyu Zhang,Hui Li,Guimin Cai,Bing Li,Guangbei Qian,Yiping Du
Normal methods for benzo[a]pyrene (BaP) determination, including gas chromatography–mass spectrometry and liquid chromatography with fluorescence detection, involve expensive instruments and complex separation and purification processes. Based on membrane enrichment, coupled with solid-phase constant-wavelength synchronous fluorescence spectrometry, a simple, fast, sensitive method was proposed for the determination of BaP in water samples. A Nylon membrane was used as the solid-phase extraction material for enrichment. After enrichment, a constant-wavelength synchronous fluorescence spectrum was scanned directly on the membrane-concentrated BaP without elution. Spectral measurement and enrichment conditions were optimized. Under optimum conditions, when using 150 mL sample solutions, the relationship between fluorescence intensity and BaP concentrations in the 0.05–10.00 μg L –1 range could be fitted by binomial function with an R 2 value of 0.9973. Limit of detection (LOD) was calculated to be 0.0137 μg L –1 . The volume of the sample solution was increased to 1000 mL to test if the method could be applied to determine lower BaP concentrations. A linear relationship still existed in the range 2.0–20.0 ng L –1 BaP with an R 2 value of 0.9895, and a LOD of 2.4 ng L –1 . The method was also used to measure the BaP concentration in several natural water samples, and recoveries were in the 90–110% range with relative standard deviations (RSDs) in the 0.58–7.93% range. Copyright © 2016 John Wiley & Sons, Ltd.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 70
·44054-44058
·
IF 3.108
Gai-Feng Kang,Yu-Zhen Wang,Yun-Feng Bai,Ze-Zhong Chen,Feng Feng
In this study, a label-free, specific and sensitive surface plasmon resonance (SPR) based competitive immunoassay was used for detecting Cd2+ in water samples. The standard curve of the method for Cd2+ was constructed in the concentration range of 0–1000 ng mL−1. The values of IC50 and the LOD of the assay were found to be 23.58 and 1.25 ng mL−1. No cross-reactivity was found with other metal ions except Hg2+. The proposed method provides an alternative method for sensitive, specific and real-time determination of Cd2+ in real aqueous samples.
研究领域:
分析化学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Yanhua Yu,Tingting Shu,Bingjie Yu,Yun Deng,Cheng Fu,Yangguan Gao,Changzhi Dong,Yibin Ruan
A novel BODIPY-hemicyanine based fluorescent probe 1 for cyanide (CN − ) detection was designed and synthesized. Among the tested anions, the probe showed high selectivity towards CN − . Only addition of CN − to probe 1 in aqueous solution (V H2O /V EtOH = 1/1) could result in a remarkable blue shift of the absorption band from 385 nm to 265 nm and induce 20-fold fluorescence enhancement at 515 nm. The sensing mechanism was based on nucleophilic addition between CN − and indolium group, which was confirmed by 1 H NMR and mass spectrum analysis. Plot of fluorescence intensity as a function of CN − concentrations exhibited a good linear relationship in the range of 0–10 μM, with a detection limit to be 1.53 ppb. Moreover, the proposed sensing approach could work in a wide pH range from 5.0–9.0 and reach an equilibrium instantaneously. Finally, probe 1 was successfully applied in detection of CN − in natural water samples and on test paper strips with satisfactory results.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Yingzhen Zhang,Juan Liu,Jun Xiao,Fu Li,Kunming Liu,Min Yang,Jinbiao Liu
As a potent oxidizing agent, hypochlorite is pervasive across various terminal disinfection processes, including water treatment, household blenching and medical sterilization. Thus, the specific visualization identification of hypochlorite in real water samples is crucial for assessing water quality safety and pollutant toxicity. Herein, a novel turn-on colorimetric/fluorescent dual-signal probe AMXM based on 6‑methoxy-2,3-dihydro-1 H -xanthene-4-carboxaldehyde scaffold has been successfully designed and synthesized for highly selective and sensitive detection of ClO − in real water sample. Upon the addition of hypochlorite, the solution's color visibly changes from red to yellow to the naked eye, and a strong yellowish green fluorescence is observed under UV light at 365 nm. AMXM demonstrates an excellent linear response (R 2 = 0.9922), with a low detection limit of 56.2 nM, and is unaffected by other potential interfering substances. The mechanism of AMXM ’s response to hypochlorite ions was confirmed through 1 H NMR spectroscopy and density functional theory (DFT) calculations. Furthermore, AMXM was successfully applied to paper test strips and used for the quantitative determination of hypochlorite ions in four real water samples.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Xueliang Li,Ming Zhang,Yue Wang,Xiaolei Wang,Hao Ma,Peng Li,Wei Song,Xiao Xia Han,Bing Zhao
Given the strong hydration propensity of fluoride ions, it is difficult to detect fluoride, especially inorganic fluoride, in aqueous samples. Resolving the issue of fluoride detection in aqueous samples is a scientific undertaking of great practical significance. Herein, we propose a new method for the sensitive and selective detection of fluoride in aqueous samples without the addition of organic solvents. The method involves surface-enhanced Raman spectroscopy using 1,4-diketo-3,6-diphenylpyrrolo[3,4- c ]pyrrole (DPP) compounds and Ag nanoparticles . The method is based on a diketopyrrolopyrrole compound linked to 1-butyl iodide (DPP1), which can sense fluoride sensitively and selectively. When DPP1 was combined with Ag NPs and reacted with tetrabutylammonium fluoride or inorganic fluoride in aqueous samples, an obvious Raman enhancement was obtained at the excitation wavelength of 633 nm. This response arises because the introduction of fluoride anions into the system changes the molecular orientation of DPP1 on the Ag NP substrate from horizontal to vertical, inducing a signal enhancement in the Raman spectrum . This system can detect inorganic fluoride at concentrations as low as 1.0 μmol L −1 (0.018 ppm), which is far below the public health service recommended levels for drinking water (0.7–1.2 ppm). Furthermore, using the proposed method, a linear response for fluoride in the concentration range of 1.0 × 10 −3 –1.0 × 10 −6 mol L −1 was obtained, which makes fluoride detection possible in practical samples, such as fluoride-containing toothpaste .
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
TALANTA
·
2015
·
IF 3.545
Yuan Tan,Tianxin Wei
This study reports a novel double-layer molecularly imprinted film (MIF)-based biosensor for rapid, sensitive and highly selective detection of small molecule 17β-estradiol (E2) that is frequently detected in environmental water samples. In this system, the modification of gold surface of SPR chip was performed by 1-dodecanethiol. Then double-layer MIF was generated on the 1-dodecanethiol modified gold surface. The non-modified and imprinted surfaces were characterized by atomic force microscopy (AFM), scanning electron microscope (SEM) and contact angle measurements . Analysis of surface plasmon resonance (SPR) spectroscopy showed that the imprinted sensing film displayed good selectivity for E2 compared to other analog molecules and NIF. A good linear relationship was obtained between the SPR angle and E2 concentrations over a range of 2.50×10 −13 –2.50×10 − 9 mol/L ( R 2 =0.993) with the lowest measurable concentration of 2.50×10 −13 mol/L. The sensor can be regenerated with the mixture of acetic acid and PBS buffer (v/v=1:9) as a desorption agent over tens of times without significant deterioration of the sensor performance. Potential interference of real environmental sample matrix was assessed by spiked samples in several waste seawater effluents. This portable sensor system can be successfully applied for on-site real-time inexpensive and easy-to-use monitoring of E2 or other small molecule pollutants in environmental samples such as effluents or water bodies .
研究领域:
环境科学
·
生物传感技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）