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Simultaneous determination of bifenox, dichlobenil and diclofop methyl by hollow carbon nanospheres enhanced magnetic carboxylic multi-walled carbon nanotubes.
Anal Chim Acta. 2018 Jun 29; 1011:40-49.AC

Abstract

A novel analytical method based on magnetic solid-phase extraction (MSPE) coupled with high performance liquid chromatography-diode array detection (HPLC-DAD) was established for three herbicides simultaneous determination. The key of the method was the explored extractant, which was a composite of hollow carbon nanospheres (HCSs) enhanced magnetic carboxylic MWCNTs (HCSs@Fe3O4-MWCNTs-COOH). MWCNTs-COOH was inserted in the pores of HCSs by oscillation and sonication with the capillary forces, making the carboxylic groups and structure intervals of the composite increase as compared to MWCNTs-COOH, therefore the extractant exhibited enhanced hydrophilicity, dispersibility, adsorptivity and selectivity. The extractant was sensitive to analytes with the structure of multi-aromatic ring, more hydrogen bond acceptor and large molecular polar surface area, which can be attributed to hydrogen bonding and π-π electron-donor-acceptor (EDA) interactions. The morphology, structure and magnetic property of the extractant were characterized. Then the explored extractant based MSPE-HPLC-DAD method was applied for bifenox (BFO), dichlobenil (DCB) and diclofop methyl (DCM) determination from wheat flour samples. Prior to real sample analysis, critical extraction parameters such as solution pH, extraction time, salt addition and temperature were investigated and optimized, and the analytical method was evaluated. It was indicated that the method had satisfactory linearities with the linear coefficients above 0.99, good precision with the RSD less than 3.5%, desirable recoveries ranged from 88.8% to 96.6%, and low limits of detection (LOD) that were 0.39, 0.24, and 0.68 ng/g for DCB, BFO and DCM, respectively. The established MSPE-HPLC-DAD method has great potentials for trace polar herbicides selective determination from complex matrix samples.

Authors+Show Affiliations

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, PR China; University of Chinese Academy of Sciences, Beijing 100039, PR China.College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.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, PR China. Electronic address: shiyp@licp.cas.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29475484

Citation

Li, Wen-Kui, et al. "Simultaneous Determination of Bifenox, Dichlobenil and Diclofop Methyl By Hollow Carbon Nanospheres Enhanced Magnetic Carboxylic Multi-walled Carbon Nanotubes." Analytica Chimica Acta, vol. 1011, 2018, pp. 40-49.
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.
Li, W. K., Zhang, H. X., & Shi, Y. P. (2018). Simultaneous determination of bifenox, dichlobenil and diclofop methyl by hollow carbon nanospheres enhanced magnetic carboxylic multi-walled carbon nanotubes. Analytica Chimica Acta, 1011, 40-49. https://doi.org/10.1016/j.aca.2018.01.030
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 Jun 29;1011:40-49. PubMed PMID: 29475484.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Simultaneous determination of bifenox, dichlobenil and diclofop methyl by hollow carbon nanospheres enhanced magnetic carboxylic multi-walled carbon nanotubes. AU - Li,Wen-Kui, AU - Zhang,Hai-Xia, AU - Shi,Yan-Ping, Y1 - 2018/01/31/ PY - 2017/11/10/received PY - 2018/01/08/revised PY - 2018/01/14/accepted PY - 2018/2/25/entrez PY - 2018/2/25/pubmed PY - 2018/2/25/medline KW - High performance liquid chromatography KW - Hollow carbon nanospheres KW - Magnetic carboxylic multi-walled carbon nanotubes KW - Magnetic solid-phase extraction KW - Wheat flour SP - 40 EP - 49 JF - Analytica chimica acta JO - Anal. Chim. Acta VL - 1011 N2 - A novel analytical method based on magnetic solid-phase extraction (MSPE) coupled with high performance liquid chromatography-diode array detection (HPLC-DAD) was established for three herbicides simultaneous determination. The key of the method was the explored extractant, which was a composite of hollow carbon nanospheres (HCSs) enhanced magnetic carboxylic MWCNTs (HCSs@Fe3O4-MWCNTs-COOH). MWCNTs-COOH was inserted in the pores of HCSs by oscillation and sonication with the capillary forces, making the carboxylic groups and structure intervals of the composite increase as compared to MWCNTs-COOH, therefore the extractant exhibited enhanced hydrophilicity, dispersibility, adsorptivity and selectivity. The extractant was sensitive to analytes with the structure of multi-aromatic ring, more hydrogen bond acceptor and large molecular polar surface area, which can be attributed to hydrogen bonding and π-π electron-donor-acceptor (EDA) interactions. The morphology, structure and magnetic property of the extractant were characterized. Then the explored extractant based MSPE-HPLC-DAD method was applied for bifenox (BFO), dichlobenil (DCB) and diclofop methyl (DCM) determination from wheat flour samples. Prior to real sample analysis, critical extraction parameters such as solution pH, extraction time, salt addition and temperature were investigated and optimized, and the analytical method was evaluated. It was indicated that the method had satisfactory linearities with the linear coefficients above 0.99, good precision with the RSD less than 3.5%, desirable recoveries ranged from 88.8% to 96.6%, and low limits of detection (LOD) that were 0.39, 0.24, and 0.68 ng/g for DCB, BFO and DCM, respectively. The established MSPE-HPLC-DAD method has great potentials for trace polar herbicides selective determination from complex matrix samples. SN - 1873-4324 UR - https://www.unboundmedicine.com/medline/citation/29475484/Simultaneous_determination_of_bifenox_dichlobenil_and_diclofop_methyl_by_hollow_carbon_nanospheres_enhanced_magnetic_carboxylic_multi_walled_carbon_nanotubes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0003-2670(18)30095-3 DB - PRIME DP - Unbound Medicine ER -
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