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Kumar S, Bhogal S, Malik AK, Aulakh JS. Magnetic graphene oxide carbon dot nanocomposites as an efficient quantification tool against parabens in water and cosmetic samples. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:104319-104335. [PMID: 37704806 DOI: 10.1007/s11356-023-29613-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 08/27/2023] [Indexed: 09/15/2023]
Abstract
A new method is developed for the simultaneous detection and extraction of parabens, including methyl paraben (MP), ethyl paraben (EP), propyl paraben (PP), and butyl paraben (BP), based on magnetic graphene oxide carbon dot nanocomposites (Fe3O4@GO@CD). Fe3O4@GO@CD has been synthesized using one pot hydrothermal method by intercalating iron oxide and carbon dots between the layers of graphene oxide. Fe3O4@GO@CD was applied as the magnetic solid phase sorbent for the simultaneous extraction and detection of parabens from water (tap and river water) and cosmetic samples (hair serum and sunscreen cream). MP was measured at concentration of 0.25-0.26 ng/mL in hair serum, while PP at 0.32-0.33 ng/mL in sunscreen cream. Notably, good recoveries (88.74-98.03%; RSD = 2.31-6.88%) for river and tap water with detection limit of 0.039-0.046 ng/mL were attained. The method has good cyclability up to 16 cycles and was highly repeatable. All these findings suggest that the Fe3O4@GO@CD would be potential sorbent for the analysis of parabens.
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Affiliation(s)
- Sandeep Kumar
- Department of Chemistry, Punjabi University, Patiala, 147002, Punjab, India
| | - Shikha Bhogal
- University Centre for Research and Development, Chandigarh University, Gharuan, Mohali, 140413, Punjab, India
- Department of Chemistry, Chandigarh University, Gharuan, Mohali, 140413, Punjab, India
| | - Ashok Kumar Malik
- Department of Chemistry, Punjabi University, Patiala, 147002, Punjab, India
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2
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Microwave assisted effective synthesis of CdS nanoparticles to determine the copper ions in artichoke leaves extract samples by flame atomic absorption spectrometry. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2022.104965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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3
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Development of a vortex-assisted dispersive micro-solid-phase extraction using reduced graphene oxide/Fe3O4 nanocomposites for the determination of chlorfenson pesticide in green tea samples by high-performance liquid chromatography-ultraviolet detection. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02616-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4
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Tekin Z, Karlıdağ NE, Özdoğan N, Koçoğlu ES, Bakırdere S. Dispersive solid phase extraction based on reduced graphene oxide modified Fe 3O 4 nanocomposite for trace determination of parabens in rock, soil, moss, seaweed, feces, and water samples from Horseshoe and Faure Islands. JOURNAL OF HAZARDOUS MATERIALS 2022; 426:127819. [PMID: 34838356 DOI: 10.1016/j.jhazmat.2021.127819] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/13/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
This study reports an efficient, green, sensitive and simple analytical protocol for trace determination of methyl paraben, ethyl paraben, propyl paraben, butylparaben and benzyl paraben by high-performance liquid chromatography-ultraviolet detection (HPLC-UV). The analytes were preconcentrated using an ultrasonication supported (US) dispersive solid phase extraction (DSPE) method based on reduced graphene oxide (rGO) modified iron nanoparticles (US-Fe3O4@rGO-DSPE). A reversed-phase C18 column and an isocratic elution program comprising of 20 mM phosphate buffer (pH 4.50) and acetonitrile(58:42, v/v) were used to elute and separate the analytes for detection. The limits of detection determined for the analytes were very low and were in the range of 0.02 - 0.16 ng mL-1. The coefficients of determination obtained for the analytes ranged from 0.9973 to 0.9998, and this validated good linearity of the method.Percent relative standard deviations obtained in the range of 2.5 - 10.6% verified the method's high intraday repeatability. Accuracy of the proposed method was assessed with spiking experiments performed on complex sample matrices. Percent recoveries calculated for spiked soil, artificial seawater and seaweed samples were in acceptable ranges of 95 - 121%, 87 - 117% and 85 - 111%, respectively. These figures of merit suggest that HPLC-UV coupled with the US-Fe3O4@rGO-DSPEmethod is suitable for the determination of parabens in Antarctic samples.
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Affiliation(s)
- Zeynep Tekin
- Yıldız Technical University, Department of Chemistry, 34349 İstanbul, Turkey
| | | | - Nizamettin Özdoğan
- Bülent Ecevit University, Institute of Science, Environmental Engineer Department, 67100 Zonguldak, Turkey
| | - Elif Seda Koçoğlu
- Yıldız Technical University, Department of Chemistry, 34349 İstanbul, Turkey
| | - Sezgin Bakırdere
- Yıldız Technical University, Department of Chemistry, 34349 İstanbul, Turkey; Turkish Academy of Sciences (TÜBA), Vedat Dalokay Street, No: 112, Çankaya, 06670 Ankara, Turkey.
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Preparation of magnetic yolk-shell structured metal-organic framework material and its application in pharmacokinetics study of alkaloids. Anal Bioanal Chem 2021; 413:6987-6999. [PMID: 34535814 DOI: 10.1007/s00216-021-03656-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/30/2021] [Accepted: 09/09/2021] [Indexed: 12/15/2022]
Abstract
In this study, a magnetic yolk-shell structured metal-organic framework material (Fe3O4@YS-UiO-66-NH2) is prepared by the directional etching of Co2+/peroxymonosulfate and in situ magnetization. The characteristic properties of the material were investigated by using field emission scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometer, Brunauer-Emmett-Teller, and contact angle test. The Fe3O4@YS-UiO-66-NH2 shows the advantages of large surface area, good magnetic property, and satisfactory stability, as well as giving high affinity to alkaloids (ALs) via hydrophilic interaction, hydrogen bonding, and π-π interaction. The results of static adsorption experiment indicate that the Fe3O4@YS-UiO-66-NH2 possesses high adsorption capacity towards ALs and the adsorption behaviors are fitted with Langmuir adsorption isotherm model. Furthermore, a magnetic solid-phase extraction using Fe3O4@YS-UiO-66-NH2 and HPLC method was developed for the analysis of ALs in spiked samples with the recovery of 89.6-100.8%. In addition, the proposed method was successfully applied in the pharmacokinetics study of berberine, coptisine, and palmatine in the rat. In short, the developed method might be used for high-efficient recognition and determination of ALs in plasma sample, which would also provide a new way to fabricate magnetic functionalized metal-organic framework in separation science.
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Zhao N, Bian Y, Dong X, Gao X, Zhao L. Magnetic solid-phase extraction based on multi-walled carbon nanotubes combined ferroferric oxide nanoparticles for the determination of five heavy metal ions in water samples by inductively coupled plasma mass spectrometry. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:1417-1427. [PMID: 34559076 DOI: 10.2166/wst.2021.321] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
An excellent magnetic multi-walled carbon nanotubes (MMWCNT) containing carboxyl material modified with ferroferric oxide (Fe3O4) nanoparticles was synthesized as the adsorbent for magnetic solid-phase extraction (MSPE) of five heavy metal ions (Pb2+, Cu2+, Co2+, Cd2+, Cr4+) in water samples followed by on-line inductively coupled plasma mass spectrometry (ICP-MS) detection. The characteristics of the adsorbent were analyzed using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and vibrating sample magnetometer (VSM). Some factors affecting extraction efficiency including pH of sample solution, the amount of adsorbent, extraction method and time, concentration and volume of desorption solvent, desorption time and evaluation of coexisting ions were optimized. Under the optimum conditions, good linearity (r ≥ 0.9951) was obtained within the range of 0.1-50.0 ng·mL-1. The limits of detection (LODs) and limits of quantification (LOQs) were 4.0-25.0 ng·L-1 and 15.0-80.0 ng·L-1, respectively. And satisfactory recoveries of five heavy metal ions ranged from 81.11% to 105.53% were acquired, and the relative standard deviations (RSDs) were no more than 6.05%. The MMWCNT synthesized had strong adsorption force for the five investigated heavy metal ions, respectively. Hence, the proposed method was so suitable and sensitive that it can be applied to the determination of trace analysis of heavy metals in water samples.
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Affiliation(s)
- Ning Zhao
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China E-mail: ; These authors contributed equally to this work
| | - Yuwei Bian
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China E-mail: ; These authors contributed equally to this work
| | - Xinyi Dong
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China E-mail:
| | - Xun Gao
- School of Pharmacy, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Longshan Zhao
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China E-mail:
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Yin SJ, Zhao J, Yang FQ. Recent applications of magnetic solid phase extraction in sample preparation for phytochemical analysis. J Pharm Biomed Anal 2020; 192:113675. [PMID: 33099113 DOI: 10.1016/j.jpba.2020.113675] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 09/01/2020] [Accepted: 10/03/2020] [Indexed: 12/22/2022]
Abstract
Sample preparation such as isolation and pre-concentration is a crucial step for the phytochemical analysis. Magnetic solid-phase extraction (MSPE) has received considerable attention, mainly due to its phase separation more conveniently by facile magnetic decantation as compared to traditional SPE. This review focused on the recent applications of MSPE in sample preparation for the analysis of phytochemical compounds in plants, biological samples and Chinese herbal preparations. In addition, the enzymes immobilized on the magnetic materials and used for the biospecific extraction of enzyme inhibitors were also discussed. The information summarized in this article may provide a reference to the further applications of MSPE in phytochemical analysis.
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Affiliation(s)
- Shi-Jun Yin
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Jing Zhao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao SAR, PR China.
| | - Feng-Qing Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China.
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Wjihi S, Aouaini F, Almuqrin AH, Lamine AB. Physicochemical assessment of prednisone adsorption on two molecular composites using statistical physics formalism in cosmetics. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.06.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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9
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Dong J, Feng Z, Kang S, An M, Wu G. Magnetic solid-phase extraction based on magnetic amino modified multiwalled carbon nanotubes for the fast determination of seven pesticide residues in water samples. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:2747-2756. [PMID: 32930306 DOI: 10.1039/d0ay00288g] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A rapid and simple analytical method based on magnetic solid-phase extraction with magnetic amino modified multiwalled carbon nanotubes with ultra-high performance liquid chromatography-tandem mass spectrometry is reported for the determination of seven pesticides (futriafol, metalaxyl, myclobutanil, napropamide, epoxiconazole, fipronil and diniconazole) in water samples. In this study, magnetic amino modified multi-walled carbon nanotubes were synthesized and selected as a new kind of material to adsorb pesticides in the water samples. Various magnetic solid-phase extraction parameters, such as the amount and type of adsorbent, extraction methods, extraction time, the type and volume of desorption solvent, desorption time and solution ionic strength, were systematically optimized. Under optimum conditions, the method validation results showed good linearity and recoveries. The calibration curves were in the range of 1.0-100 ng mL-1 for napropamide, epoxiconazole, metalaxyl, and fipronil, while they were 5.0-500 ng mL-1 for futriafol, myclobutanil, and diniconazole, with determination coefficients (R2) higher than 0.9909. The limits of quantification were 1.0-5.0 ng mL-1 and the limits of detection were 0.3-1.5 ng mL-1. The recoveries of the seven pesticides ranged from 80.4% to 103.2%. This developed method, which is more convenient and effective in comparison with traditional methods, has been successfully applied for the analysis of pesticides in water samples qualitatively and quantitatively.
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Affiliation(s)
- JiaNi Dong
- Baotou Medical College, Baotou, Inner Mongolia 014060, China.
| | - ZhiAo Feng
- Baotou Medical College, Baotou, Inner Mongolia 014060, China.
| | - SongSong Kang
- Baotou Medical College, Baotou, Inner Mongolia 014060, China.
| | - Ming An
- Baotou Medical College, Baotou, Inner Mongolia 014060, China.
| | - GuoDong Wu
- Baotou Medical College, Baotou, Inner Mongolia 014060, China.
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10
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Abstract
This review provides an overview of the most recent developments involving materials for solid-phase extraction applied to determine organic contaminants. It mainly concerns polymer-based sorbents that include high-capacity, as well as selective sorbents, inorganic-based sorbents that include those prepared using sol-gel technology along with structured porous materials based on inorganic species, and carbon nanomaterials, such as graphene and carbon nanotubes. Different types of magnetic nanoparticles coated with these materials are also reviewed. Such materials, together with their main morphological and chemical features, are described, as are some representative examples of their application as solid-phase extraction materials to extract organic compounds from different types of samples, including environmental water, biological fluids, and food.
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11
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Li WK, Shi YP. Recent advances and applications of carbon nanotubes based composites in magnetic solid-phase extraction. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.06.039] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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12
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Ma S, Wang M, You T, Wang K. Using Magnetic Multiwalled Carbon Nanotubes as Modified QuEChERS Adsorbent for Simultaneous Determination of Multiple Mycotoxins in Grains by UPLC-MS/MS. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:8035-8044. [PMID: 31282154 DOI: 10.1021/acs.jafc.9b00090] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The simultaneous detection of multiple mycotoxins is important due to the increased toxic effects of combined mycotoxins in grains. In this research, a combination of modified QuEChERS with ultrahigh-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was used for simultaneous detection of 20 mycotoxins in grains. A series of different types of magnetic (Fe3O4) nanoparticles modified with multiwalled carbon nanotubes (Fe3O4-MWCNTs) were designed as modified QuEChERS adsorbents for facile and efficient purification and for target interferences removal in the matrices. When there is an external magnetic field, the proposed modified QuEChERS method uses a shorter pretreatment time compared with the traditional QuEChERS method, which makes it possible to conduct high-throughput analyses. To optimize the QuEChERS process, the extraction solvent and the type and amount of the Fe3O4-MWCNTs were investigated. Under optimal conditions, the method was validated and showed satisfactory linearity (r2 ≥ 0.9965), good recovery (73.5-112.9%), good precision (1.3-12.7%), and excellent sensitivity (ranging from 0.0021 to 5.4457 ng g-1), which indicates that this method can be used for detecting multiple mycotoxins in real samples.
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Affiliation(s)
- Shuai Ma
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering , Jiangsu University , Zhenjiang 212013 , P.R. China
- Beijing Research Center for Agricultural Standards and Testing, Risk Assessment Laboratory for Agro-Products (Beijing), Ministry of Agriculture , Beijing Municipal Key Laboratory of Agriculture Environment Monitoring , No. 9 Middle Road of Shu Guang Hua Yuan, Haidian Dist. , Beijing 100097 , P.R. China
| | - Meng Wang
- Beijing Research Center for Agricultural Standards and Testing, Risk Assessment Laboratory for Agro-Products (Beijing), Ministry of Agriculture , Beijing Municipal Key Laboratory of Agriculture Environment Monitoring , No. 9 Middle Road of Shu Guang Hua Yuan, Haidian Dist. , Beijing 100097 , P.R. China
| | - Tianyan You
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering , Jiangsu University , Zhenjiang 212013 , P.R. China
| | - Kun Wang
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering , Jiangsu University , Zhenjiang 212013 , P.R. China
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering , Qingdao University of Science and Technology , Qingdao 266042 , P.R. China
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13
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Er EÖ, Akkaya E, Özbek B, Bakırdere S. Development of an analytical method based on citric acid coated magnetite nanoparticles assisted dispersive magnetic solid-phase extraction for the enrichment and extraction of sildenafil, tadalafil, vardenafil and avanafil in human plasma and urine prior to determination by LC-MS/MS. Microchem J 2019. [DOI: 10.1016/j.microc.2019.03.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Ariffin MM, Azmi AHM, Saleh NM, Mohamad S, Rozi SKM. Surfactant functionalisation of magnetic nanoparticles: A greener method for parabens determination in water samples by using magnetic solid phase extraction. Microchem J 2019. [DOI: 10.1016/j.microc.2019.04.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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15
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Li N, Zhang HF, Chen J, Shi YP. One-Step in Situ Preparation of Fe3O4/Carboxylated Multi-Walled Carbon Nanotube Hybrid for the Determination of Caffeine in Carbonated Beverages. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20180094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Na Li
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Hong-Fei Zhang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Juan Chen
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Yan-Ping Shi
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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Recent progress in nanomaterial-based assay for the detection of phytotoxins in foods. Food Chem 2018; 277:162-178. [PMID: 30502132 DOI: 10.1016/j.foodchem.2018.10.075] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 09/03/2018] [Accepted: 10/14/2018] [Indexed: 12/22/2022]
Abstract
Phytotoxins refers to toxic chemicals derived from plants. They include both secondary metabolites that are dose-dependently toxic and allergens that can cause anaphylactic shock in sensitive individuals. Detecting phytotoxins in foods is increasingly important. Conventional methods for detecting phytotoxins lack sufficient sensitivity and operational convenience. Nanomaterial-based determination assays show great competence in fast and accurate sensing of trace substances. In the present review, representative phytotoxin categories of alkaloids, cyanides, and proteins are discussed. Application of notable nanomaterials, e.g. carbon nanotubes, graphene oxide, magnetic nanoparticles, metal-based nanotools, and quantum dots, in specific sensing strategies to fit the physiochemical properties of the target toxins are summarized. Nanomaterials mainly play four roles in phytotoxin detection: 1) analyte enricher; 2) sensor structure mediator; 3) target recognizer or reactant; 4) signaling agent. Great achievements have been made in the detection of trace plant-derived toxins in food matrices, yet there are still challenges awaiting further investigation.
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17
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Preparation and application of a molecular capture for safety detection of cosmetics based on surface imprinting and multi-walled carbon nanotubes. J Colloid Interface Sci 2018; 527:124-131. [DOI: 10.1016/j.jcis.2018.05.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 05/11/2018] [Accepted: 05/13/2018] [Indexed: 11/21/2022]
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18
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Ma JB, Qiu HW, Rui QH, Liao YF, Chen YM, Xu J, Zhang Y, Zhu Y, Zhao YG. Enhanced cleanup efficiency hydroxy functionalized-magnetic graphene oxide and its comparison with magnetic carboxyl-graphene for PRiME pass-through cleanup of strychnine and brucine in human plasma samples. Anal Chim Acta 2018; 1020:41-50. [DOI: 10.1016/j.aca.2018.03.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/04/2018] [Accepted: 03/07/2018] [Indexed: 12/19/2022]
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19
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Makkliang F, Kanatharana P, Thavarungkul P, Thammakhet-Buranachai C. A miniaturized monolith-MWCNTs-COOH multi-stir-rod microextractor device for trace parabens determination in cosmetic and personal care products. Talanta 2018; 184:429-436. [DOI: 10.1016/j.talanta.2018.03.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/08/2018] [Accepted: 03/10/2018] [Indexed: 11/30/2022]
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20
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Li WK, Zhang HX, Shi YP. Simultaneous determination of bifenox, dichlobenil and diclofop methyl by hollow carbon nanospheres enhanced magnetic carboxylic multi-walled carbon nanotubes. Anal Chim Acta 2018; 1011:40-49. [DOI: 10.1016/j.aca.2018.01.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 01/08/2018] [Accepted: 01/14/2018] [Indexed: 01/27/2023]
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21
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Lv X, Li G, Zhou H, Li D, Zhang J, Pang Z, Lv P, Cai Y, Huang F, Wei Q. Novel freestanding N-doped carbon coated Fe3O4 nanocomposites with 3D carbon fibers network derived from bacterial cellulose for supercapacitor application. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.12.082] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Multi-walled carbon nanotubes-based magnetic solid-phase extraction for the determination of zearalenone and its derivatives in maize by ultra-high performance liquid chromatography-tandem mass spectrometry. Food Control 2017. [DOI: 10.1016/j.foodcont.2017.03.044] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Li WK, Zhang HX, Shi YP. Selective determination of aromatic amino acids by magnetic hydroxylated MWCNTs and MOFs based composite. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1059:27-34. [DOI: 10.1016/j.jchromb.2017.05.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 05/16/2017] [Accepted: 05/22/2017] [Indexed: 02/06/2023]
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24
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Li S, Chen D. Rapid Determination of Aconitum Alkaloids from Human Urine by UHPLC–HRMS. J Anal Toxicol 2017; 41:611-617. [DOI: 10.1093/jat/bkx045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 06/15/2017] [Indexed: 12/25/2022] Open
Affiliation(s)
- Shaohua Li
- College of Tea and Food Science, Wuyi University, No. 16 Wuyi Street, Wuyishan, Fujian 354300, China
| | - Dawei Chen
- China National Center for Food Safety Risk Assessment, Building 2, Guangqu Road 37, Beijing 100021, China
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25
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Ahmadi M, Elmongy H, Madrakian T, Abdel-Rehim M. Nanomaterials as sorbents for sample preparation in bioanalysis: A review. Anal Chim Acta 2017; 958:1-21. [DOI: 10.1016/j.aca.2016.11.062] [Citation(s) in RCA: 177] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 11/24/2016] [Accepted: 11/27/2016] [Indexed: 01/02/2023]
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26
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Filippou O, Bitas D, Samanidou V. Green approaches in sample preparation of bioanalytical samples prior to chromatographic analysis. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1043:44-62. [DOI: 10.1016/j.jchromb.2016.08.040] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 08/21/2016] [Accepted: 08/27/2016] [Indexed: 01/07/2023]
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27
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Zeng Q, Liu YM, Jia YW, Wan LH, Liao X. PEGylation of magnetic multi-walled carbon nanotubes for enhanced selectivity of dispersive solid phase extraction. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:186-194. [DOI: 10.1016/j.msec.2016.09.082] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 08/24/2016] [Accepted: 09/29/2016] [Indexed: 11/15/2022]
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Iron (II, III) oxide/multi-walled carbon nanotube composite as solid-phase extraction sorbent followed by ultra-high performance liquid chromatography tandem mass spectrometry for simultaneous determination of zearalenone and type A trichothecenes in Salviae miltiorrhizae Radix et Rhizoma (Danshen). J Chromatogr A 2017; 1482:1-10. [DOI: 10.1016/j.chroma.2016.12.058] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/16/2016] [Accepted: 12/19/2016] [Indexed: 11/21/2022]
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29
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Ma J, Jiang L, Wu G, Xia Y, Lu W, Li J, Chen L. Determination of six sulfonylurea herbicides in environmental water samples by magnetic solid-phase extraction using multi-walled carbon nanotubes as adsorbents coupled with high-performance liquid chromatography. J Chromatogr A 2016; 1466:12-20. [DOI: 10.1016/j.chroma.2016.08.065] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 08/26/2016] [Accepted: 08/29/2016] [Indexed: 01/24/2023]
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Determination of type A trichothecenes in coix seed by magnetic solid-phase extraction based on magnetic multi-walled carbon nanotubes coupled with ultra-high performance liquid chromatography-tandem mass spectrometry. Anal Bioanal Chem 2016; 408:6823-31. [PMID: 27475443 DOI: 10.1007/s00216-016-9809-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/12/2016] [Accepted: 07/18/2016] [Indexed: 10/21/2022]
Abstract
Magnetic solid-phase extraction (m-SPE) is a promising sample preparation approach due to its convenience, speed, and simplicity. For the first time, a rapid and reliable m-SPE approach using magnetic multi-walled carbon nanotubes (m-MWCNTs) as the adsorbent was proposed for purification of type A trichothecenes including T-2 toxins (T2), HT-2 toxins (HT-2), diacetoxyscirpenol (DAS), and neosolaniol (NEO) in coix seed. The m-MWCNTs were synthesized by assembling the magnetic nanoparticles (Fe3O4) with MWCNTs by sonication through an aggregation wrap mechanism, and characterized by transmission electron microscope. Several key parameters affecting the performance of the procedure were extensively investigated including extraction solutions, desorption solvents, and m-MWCNT amounts. Under the optimal sample preparation conditions followed by analysis with ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS), high sensitivity (limit of quantification in the range of 0.3-1.5 μg kg(-1)), good linearity (R (2) > 0.99), satisfactory recovery (73.6-90.6 %), and acceptable precision (≤2.5 %) were obtained. The analytical performance of the developed method has also been successfully evaluated in real coix seed samples. Graphical Abstract Flow chart of determination of type A trichothecenes in coix seed by magnetic solid-phase extraction coupled with ultra-high performance liquid chromatography-tandem mass spectrometry.
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Yang L, Xie X, Cai L, Ran X, Li Y, Yin T, Zhao H, Li CP. p-sulfonated calix[8]arene functionalized graphene as a "turn on" fluorescent sensing platform for aconitine determination. Biosens Bioelectron 2016; 82:146-54. [PMID: 27085945 DOI: 10.1016/j.bios.2016.04.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 03/22/2016] [Accepted: 04/04/2016] [Indexed: 11/16/2022]
Abstract
This work reports a novel method for the determination of aconitine through the competitive host-guest interaction between p-sulfonated calix[8]arene (SCX8) and signal probe/target molecules by using SCX8 functionalized reduced graphene oxide (SCX8-RGO) as a receptor. Three dyes (ST, RhB, BRB) and aconitine were selected as the probe and target molecules, respectively. The formation of SCX8-RGO·ST, SCX8-RGO·RhB, and SCX8-RGO·BRB complexes greatly decreases the fluorescence emission of ST, RhB, and BRB. The aconitine/SCX8 complex possesses a higher binding constant than ST/SCX8, RhB/SCX8, and BRB/SCX8 complexes, thus the dye in the SCX8 cavity can be replaced by aconitine to revert the fluorescence emission of SCX8-RGO·dye, leading to a "switch-on" fluorescence response. The fluorescence intensity of SCX8-RGO·ST, SCX8-RGO·RhB, and SCX8-RGO·BRB complexes increased linearly with increasing concentration of aconitine ranging from 1.0 to 14.0μM, 2.0-16.0μM, and 1.0-16.0μM, respectively. Based on the competitive host-guest interaction, the proposed detection method for aconitine showed detection limits of 0.28μM, 0.60μM, and 0.37μM, respectively, and was successfully applied for the determination of aconitine in human serum samples with good recoveries from 95.1% to 104.8%. The proposed method showed high selectivity for aconitine beyond competitive binding analytes. In addition, the inclusion complex of the SCX8/aconitine was studied by the molecular docking and molecular dynamics simulation, which indicated that the phenyl ester group of the aconitine molecule was included into the SCX8 cavity.
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Affiliation(s)
- Long Yang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Xiaoguang Xie
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Le Cai
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Xin Ran
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Yucong Li
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Tianpeng Yin
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Hui Zhao
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming 650091, PR China.
| | - Can-Peng Li
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China.
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A novel miniaturized zinc oxide/hydroxylated multiwalled carbon nanotubes as a stir-brush microextractor device for carbamate pesticides analysis. Anal Chim Acta 2016; 917:27-36. [DOI: 10.1016/j.aca.2016.02.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 02/26/2016] [Accepted: 02/26/2016] [Indexed: 11/22/2022]
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33
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Li J, Wang YB, Li KY, Cao YQ, Wu S, Wu L. Advances in different configurations of solid-phase microextraction and their applications in food and environmental analysis. Trends Analyt Chem 2015. [DOI: 10.1016/j.trac.2015.04.023] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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34
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Yang J, Li Y, Wang Y, Ruan J, Zhang J, Sun C. Recent advances in analysis of phthalate esters in foods. Trends Analyt Chem 2015. [DOI: 10.1016/j.trac.2015.03.018] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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35
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Imprinted electrochemical sensor based on magnetic multi-walled carbon nanotube for sensitive determination of kanamycin. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2015.07.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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36
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Herrero-Latorre C, Barciela-García J, García-Martín S, Peña-Crecente R, Otárola-Jiménez J. Magnetic solid-phase extraction using carbon nanotubes as sorbents: A review. Anal Chim Acta 2015; 892:10-26. [DOI: 10.1016/j.aca.2015.07.046] [Citation(s) in RCA: 243] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/10/2015] [Accepted: 07/16/2015] [Indexed: 11/26/2022]
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37
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Magnetic graphene solid-phase extraction for the determination of carbamate pesticides in tomatoes coupled with high performance liquid chromatography. Talanta 2015; 141:212-9. [DOI: 10.1016/j.talanta.2015.04.018] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/27/2015] [Accepted: 04/05/2015] [Indexed: 12/23/2022]
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38
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Development of magnetic micro-solid phase extraction for analysis of phthalate esters in packaged food. Food Chem 2015; 166:275-282. [DOI: 10.1016/j.foodchem.2014.06.036] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 01/04/2014] [Accepted: 06/06/2014] [Indexed: 11/19/2022]
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39
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Rafiee E, Joshaghani M, Ghaderi-Shekhi Abadi P. Shape-dependent catalytic activity of Fe3O4 nanostructures under the influence of an external magnetic field for multicomponent reactions in aqueous media. RSC Adv 2015. [DOI: 10.1039/c5ra14467a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Fe3O4 nanostructures were synthesized under external magnetic field, shown shape-dependent catalytic activity for the synthesis of imidazole derivatives in water.
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Affiliation(s)
- E. Rafiee
- Department of Inorganic Chemistry
- Faculty of Chemistry
- Razi University
- Kermanshah
- Iran
| | - M. Joshaghani
- Department of Inorganic Chemistry
- Faculty of Chemistry
- Razi University
- Kermanshah
- Iran
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40
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FENG Z, XU Y, WEI S, ZHANG B, GUAN F, LI S. Fabrication of Fe 3O 4 Nanoparticle-coalesced Hydroxylated Multi-walled Carbon Nanotubes for the Analysis of Strychnine in Human Serum. ANAL SCI 2015; 31:399-406. [DOI: 10.2116/analsci.31.399] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Zufei FENG
- College of Forensic & Medicine, Xi’an Jiaotong University
| | - Yuehong XU
- College of Forensic & Medicine, Xi’an Jiaotong University
| | - Shuguang WEI
- College of Forensic & Medicine, Xi’an Jiaotong University
| | - Bao ZHANG
- College of Forensic & Medicine, Xi’an Jiaotong University
| | - Fanglin GUAN
- College of Forensic & Medicine, Xi’an Jiaotong University
| | - Shengbin LI
- College of Forensic & Medicine, Xi’an Jiaotong University
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41
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Wang L, Xu X, Zhang Z, Zhang D, Liu X, Zhang L. Green sample clean-up based on magnetic multiwalled carbon nanotubes for the determination of lamivudine by high performance liquid chromatography. RSC Adv 2015. [DOI: 10.1039/c5ra00102a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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42
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Recent applications of carbon nanotube sorbents in analytical chemistry. J Chromatogr A 2014; 1357:110-46. [DOI: 10.1016/j.chroma.2014.05.035] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 05/12/2014] [Accepted: 05/13/2014] [Indexed: 01/10/2023]
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43
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Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis. Trends Analyt Chem 2014. [DOI: 10.1016/j.trac.2014.03.011] [Citation(s) in RCA: 280] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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44
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Yu P, Ma H, Shang Y, Wu J, Shen S. Polyethylene glycol modified magnetic carbon nanotubes as nanosorbents for the determination of methylprednisolone in rat plasma by high performance liquid chromatography. J Chromatogr A 2014; 1348:27-33. [DOI: 10.1016/j.chroma.2014.04.065] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 04/18/2014] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
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45
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Determination of puerarin in rat plasma using PEGylated magnetic carbon nanotubes by high performance liquid chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 959:55-61. [DOI: 10.1016/j.jchromb.2014.03.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 03/28/2014] [Accepted: 03/30/2014] [Indexed: 01/12/2023]
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46
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Magnetite-doped eggshell membrane as a magnetic sorbent for extraction of aluminum(III) ions prior to their fluorometric determination. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1225-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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47
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Zhu B, Yang P, Yu H, Yan L, Wei Q, Du B. Development of a novel water-soluble magnetic fluorescent nanoparticle for the selective detection and removal of Cu2+. NANOTECHNOLOGY 2013; 24:495502. [PMID: 24231800 DOI: 10.1088/0957-4484/24/49/495502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Recently, much attention has been paid to the selective detection and removal of Cu2+ because an excess of Cu2+ can harm the environment and living systems. Herein, we developed a novel water-soluble di-2-picolylamine/proline co-modified Fe3O4@ZnS magnetic fluorescent nanoparticle (MFNP-Cu) for the selective detection and removal of Cu2+ through a dithiocarbamate linkage strategy. The characterization of MFNP-Cu was confirmed by x-ray diffraction (XRD), transmission electron microscope (TEM), magnetization hysteresis loops, infrared (IR) and emission spectra. The results showed that MFNP-Cu could quantifiably detect Cu2+ with high sensitivity and selectivity over a broad pH range (pH 4.1-9). The maximum adsorption capacity of MFNP-Cu was calculated to be about 517.9 mg g(-1), which is higher than previously reported. This excellent property was investigated by kinetics equilibrium and thermodynamic studies. Moreover, the removal properties of MFNP-Cu toward Cu2+ from contaminated water samples was achieved by an external magnetic field.
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Affiliation(s)
- Baocun Zhu
- School of Resources and Environment, University of Jinan, Shandong Provincial Engineering Technology Research Center for Ecological Carbon Sink and Capture Utilization, Jinan 250022, People's Republic of China
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48
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Chen R, Chai L, Li Q, Shi Y, Wang Y, Mohammad A. Preparation and characterization of magnetic Fe3O 4/CNT nanoparticles by RPO method to enhance the efficient removal of Cr(VI). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:7175-7185. [PMID: 23644945 DOI: 10.1007/s11356-013-1671-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Accepted: 03/20/2013] [Indexed: 06/02/2023]
Abstract
This work described a novel method for the synthesis of high-ferromagnetism nanoparticles (Fe3O4/CNTs) to efficiently remove Cr(VI) from aqueous solution. The Fe3O4/carbon nanotubes (CNTs) were prepared by in situ reduction with post-oxidation method by using cheap and environmentally friendly precursor under mild condition. Magnetic hysteresis loops revealed that Fe3O4/CNTs had superior saturation magnetization (152 emu/g), enabling the highly efficient recovery of Fe3O4/CNTs from aqueous solution by magnetic separation at low magnetic field gradients. FTIR, Raman, XPS, and TEM observations were employed to characterize the physical-chemical properties of Fe3O4/CNTs, demonstrating that CNTs were successfully coated with iron oxide matrix. The adsorption equilibrium of Cr(VI) on Fe3O4/CNTs was reached within 30 min. Langmuir, Freundlich, and Dubinin-Radushkevich isotherm were chosen to analyze the equilibrium data. The results indicated that Langmuir model can well describe the equilibrium data with the maximum adsorption capacity of 47.98 mg/g at room temperature and 83.54 mg/g at 353 K. The adsorption capacity of Fe3O4/CNTs for Cr(VI) was greatly improved as compared to raw CNTs and other similar adsorbents reported. The pseudo-second-order kinetic model provided the best description of Cr(VI) adsorption on Fe3O4/CNTs. Most importantly, possible synthesis mechanism and Cr(VI) removal mechanism were explored. The results suggest that large amounts of Cr(VI) were adsorbed on Fe3O4/CNTs surface by substituting the surface position of -OH and then reducing it to Cr(OH)3 and Cr2O3.
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Affiliation(s)
- Runhua Chen
- School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China
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49
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Xie L, Jiang R, Zhu F, Liu H, Ouyang G. Application of functionalized magnetic nanoparticles in sample preparation. Anal Bioanal Chem 2013; 406:377-99. [PMID: 24037613 DOI: 10.1007/s00216-013-7302-6] [Citation(s) in RCA: 209] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 08/11/2013] [Accepted: 08/13/2013] [Indexed: 11/26/2022]
Abstract
Functionalized magnetic nanoparticles have attracted much attention in sample preparation because of their excellent performance compared with traditional sample-preparation sorbents. In this review, we describe the application of magnetic nanoparticles functionalized with silica, octadecylsilane, carbon-based material, surfactants, and polymers as adsorbents for separation and preconcentration of analytes from a variety of matrices. Magnetic solid-phase extraction (MSPE) techniques, mainly reported in the last five years, are presented and discussed.
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Affiliation(s)
- Lijun Xie
- MOE Key Laboratory of Aquatic Product Safety/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, China
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50
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Preparation and Characterization of Chelerythrine Nanoparticles Composed of Magnetic Multiwalled Carbon Nanotubes. ACTA ACUST UNITED AC 2013. [DOI: 10.4028/www.scientific.net/amr.788.127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, chelerythrine nanoparticles composed of magnetic multiwalled carbon nanotubes (Fe3O4/MWNTs-CHE) were prepared by adsorption method with CHE as the model drug and Fe3O4/MWNTs nanocomposites as the drug carrier. Optimized nanoparticles were characterized by scanning electron microscopy (SEM), Zeta potential and in vitro drug release.The in vitro drug release profiles of Fe3O4/MWNTs-CHE nanoformulation exhibited a biphasic pattern with an initial fast release phase followed by a slower release phase. The CHE release profile from Fe3O4/MWNTs-CHE nanoparticles followed Korsmeyer-Peppas model with Fickian diffusion mechanism for drug release.
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