title: [Determination of anilines in environmental water samples by simultaneous derivatization and ultrasound assisted emulsification microextraction combined with gas chromatography-flame ionization detectors].
abstract: This research demonstrated a new method, simultaneous derivatization and ultrasound assisted emulsification microextraction combined with gas chromatography-flame ionization detector (SD-USAEME-GC-FID), for the determination of anilines in environmental water samples. In this study, several factors, such as the volume of butylchloroformate (as derivatization agent/ extraction solvent), ultrasonication time, solution pH, salt addition, and centrifuging time and speed, were optimized in order to obtain good method performance. As a result, under the optimal conditions, the method showed good linearity in the concentration range of 6-60 000 μg x L(-1) with correlation coefficients (R2) ranging from 0.999 7 to 0.999 9 for the five target anilines. The limit of detection ( LOD) , based on signal to noise ratio of 3 , ranged from 1.1-4.1 μg x L(-1). The relative standard deviations (RSD) varied from 2.4% to 5.7% (n = 6) and the enrichment factors (EF) ranged from 317 to 846. The proposed method was also successfully applied to analyze seven environmental water samples, with the relative recoveries (RR) ranging from 86.8% to 105.5%. In a conclusion, this method was convenient, highly sensitive, inexpensive and environment-friendly, and therefore, the present method can be used as a preferred method for the determination of anilines in environmental water samples.
authors.forename: Li-Xun
authors.initials: LX
authors.lastname: Tian
authors.forename: Zhi-Xi
authors.initials: ZX
authors.lastname: Dai
authors.forename: Guo-Dong
authors.initials: GD
authors.lastname: Wang
authors.forename: Huan-Xin
authors.initials: HX
authors.lastname: Weng
mesh_terms: D000814:Aniline Compounds / Q000032:analysis*; D002849:Chromatography, Gas; D005410:Flame Ionization; D057230:Limit of Detection; D012492:Salts; D014465:Ultrasonics; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000814:Aniline Compounds; D012492:Salts; D014874:Water Pollutants, Chemical; C023650:aniline