title: Magnetical hollow fiber bar collection of extract in homogenous ionic liquid microextraction of triazine herbicides in water samples.
abstract: The homogeneous ionic liquid microextraction combined with magnetical hollow fiber bar collection was developed for extracting triazine herbicides from water samples. These analytes were separated and determined by high performance liquid chromatography. The triazines were quickly extracted into ionic liquid microdroplets dispersed in solution, and then these microdroplets were completely collected with magnetical hollow fiber bars; the pores of which were impregnated with hydrophobic ionic liquid, which makes the phase separation simplified with no need of centrifugation. Some experimental parameters, such as the type of ionic liquid, ultrasonic immersion time of hollow fiber, pH of sample solution, volume of hydrophilic ionic liquid, amount of ion-pairing agent NH4PF6, NaCl concentration, number of magnetical hollow fiber bar, stirring rate, and collection time were investigated and optimized. When the present method was applied to the analysis of real water samples, the precision and recoveries of six triazine herbicides vary from 0.1 to 9.2% and 73.4 to 118.5%, respectively. The detection limits for terbumeton, ametryn, prometryn, terbutryn, trietazine, and dimethametryn were 0.48, 0.15, 0.15, 0.14, 0.35, and 0.16 μg L-1, respectively.
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, Jilin, 130012, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Wang
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, Jilin, 130012, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Jiang
authors.affiliation: Jilin Entry-exit Inspection and Quarantine Bureau, Changchun, Jilin, 130062, China.
authors.forename: Mingqin
authors.initials: M
authors.lastname: Kang
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, Jilin, 130012, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, Jilin, 130012, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Zang
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, Jilin, 130012, China.
authors.forename: Sizhu
authors.initials: S
authors.lastname: Tian
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, Jilin, 130012, China.
authors.forename: Hanqi
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, Jilin, 130012, China.
authors.forename: Aimin
authors.initials: A
authors.lastname: Yu
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, Jilin, 130012, China. zzw@jlu.edu.cn.
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Zhang
keywords: Environmental water samples; Homogeneous ionic liquid microextraction; Ionic liquid; Magnetical hollow fiber bar collection; Triazine herbicides