Magnetical hollow fiber bar collection of extract in homogenous ionic liquid microextraction of triazine herbicides in water samples

• Published in: Analytical and bioanalytical chemistry Vol. 409; no. 10; pp. 2569 - 2579
• Main Authors: Wang, Kun, Jiang, Jia, Kang, Mingqin, Li, Dan, Zang, Shuang, Tian, Sizhu, Zhang, Hanqi, Yu, Aimin, Zhang, Ziwei
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2017; Springer; Springer Nature B.V
• Subjects: Analytical Chemistry; Bamboo; Bars; Biochemistry; Centrifugation; Characterization and Evaluation of Materials; Chemical properties; Chemistry; Chemistry and Materials Science; Chromatography; Collection; Detection limits; Extraction (Chemistry); Fibers; Food Science; Herbicides; Heterocyclic compounds; Ionic liquids; Laboratory Medicine; Liquid chromatography; Magnetic materials; Mathematical analysis; Methods; Monitoring/Environmental Analysis; Nitrogen compounds; Porosity; Research Paper; Sodium chloride; Solvents; Stirring; Toxicity; Viscosity; Water analysis; Water sampling; China; Environmental water samples; Homogeneous ionic liquid microextraction; Magnetical hollow fiber bar collection; Triazine herbicides; Ionic liquid
• ISSN: 1618-2642; 1618-2650
• DOI: 10.1007/s00216-017-0201-5

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 NH 4 PF 6 , 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.