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Determination of four sulfonylurea herbicides in tea by matrix solid-phase dispersion cleanup followed by dispersive liquid-liquid microextraction.
J Sep Sci. 2014 Sep; 37(17):2380-7.JS

Abstract

Matrix solid-phase dispersion combined with dispersive liquid-liquid microextraction has been developed as a new sample pretreatment method for the determination of four sulfonylurea herbicides (chlorsulfuron, bensulfuron-methyl, chlorimuron-ethyl, and pyrazosulfuron) in tea by high-performance liquid chromatography with diode array detection. The extraction and cleanup by matrix solid-phase dispersion was carried out by using CN-silica as dispersant and carbon nanotubes as cleanup sorbent eluted with acidified dichloromethane. The eluent of matrix solid-phase dispersion was evaporated and redissolved in 0.5 mL methanol, and used as the dispersive solvent of the following dispersive liquid-liquid microextraction procedure for further purification and enrichment of the target analytes before high-performance liquid chromatography analysis. Under the optimum conditions, the method yielded a linear calibration curve in the concentration range from 5.0 to 10 000 ng/g for target analytes with a correlation coefficients (r(2)) ranging from 0.9959 to 0.9998. The limits of detection for the analytes were in the range of 1.31-2.81 ng/g. Recoveries of the four sulfonylurea herbicides at two fortification levels were between 72.8 and 110.6% with relative standard deviations lower than 6.95%. The method was successfully applied to the analysis of four sulfonylurea herbicides in several tea samples.

Authors+Show Affiliations

Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, P. R. China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

24956010

Citation

Liang, Pei, et al. "Determination of Four Sulfonylurea Herbicides in Tea By Matrix Solid-phase Dispersion Cleanup Followed By Dispersive Liquid-liquid Microextraction." Journal of Separation Science, vol. 37, no. 17, 2014, pp. 2380-7.
Liang P, Wang J, Liu G, et al. Determination of four sulfonylurea herbicides in tea by matrix solid-phase dispersion cleanup followed by dispersive liquid-liquid microextraction. J Sep Sci. 2014;37(17):2380-7.
Liang, P., Wang, J., Liu, G., & Guan, J. (2014). Determination of four sulfonylurea herbicides in tea by matrix solid-phase dispersion cleanup followed by dispersive liquid-liquid microextraction. Journal of Separation Science, 37(17), 2380-7. https://doi.org/10.1002/jssc.201400449
Liang P, et al. Determination of Four Sulfonylurea Herbicides in Tea By Matrix Solid-phase Dispersion Cleanup Followed By Dispersive Liquid-liquid Microextraction. J Sep Sci. 2014;37(17):2380-7. PubMed PMID: 24956010.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Determination of four sulfonylurea herbicides in tea by matrix solid-phase dispersion cleanup followed by dispersive liquid-liquid microextraction. AU - Liang,Pei, AU - Wang,Jinjin, AU - Liu,Guojiao, AU - Guan,Jinyan, Y1 - 2014/07/14/ PY - 2014/04/20/received PY - 2014/06/07/revised PY - 2014/06/11/accepted PY - 2014/6/24/entrez PY - 2014/6/24/pubmed PY - 2015/5/13/medline KW - Dispersive liquid-liquid microextraction KW - High-performance liquid chromatography KW - Matrix solid-phase dispersion KW - Sulfonylurea herbicides KW - Tea samples SP - 2380 EP - 7 JF - Journal of separation science JO - J Sep Sci VL - 37 IS - 17 N2 - Matrix solid-phase dispersion combined with dispersive liquid-liquid microextraction has been developed as a new sample pretreatment method for the determination of four sulfonylurea herbicides (chlorsulfuron, bensulfuron-methyl, chlorimuron-ethyl, and pyrazosulfuron) in tea by high-performance liquid chromatography with diode array detection. The extraction and cleanup by matrix solid-phase dispersion was carried out by using CN-silica as dispersant and carbon nanotubes as cleanup sorbent eluted with acidified dichloromethane. The eluent of matrix solid-phase dispersion was evaporated and redissolved in 0.5 mL methanol, and used as the dispersive solvent of the following dispersive liquid-liquid microextraction procedure for further purification and enrichment of the target analytes before high-performance liquid chromatography analysis. Under the optimum conditions, the method yielded a linear calibration curve in the concentration range from 5.0 to 10 000 ng/g for target analytes with a correlation coefficients (r(2)) ranging from 0.9959 to 0.9998. The limits of detection for the analytes were in the range of 1.31-2.81 ng/g. Recoveries of the four sulfonylurea herbicides at two fortification levels were between 72.8 and 110.6% with relative standard deviations lower than 6.95%. The method was successfully applied to the analysis of four sulfonylurea herbicides in several tea samples. SN - 1615-9314 UR - https://www.unboundmedicine.com/medline/citation/24956010/Determination_of_four_sulfonylurea_herbicides_in_tea_by_matrix_solid_phase_dispersion_cleanup_followed_by_dispersive_liquid_liquid_microextraction_ DB - PRIME DP - Unbound Medicine ER -