Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.chroma.2012.06.048
Title: A new 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate ionic liquid based ultrasound-assisted emulsification microextraction for the determination of organic ultraviolet filters in environmental water samples
Authors: Ge, D.
Lee, H.K. 
Keywords: Ionic liquid
Liquid chromatography
Organic UV filters in environmental water samples
Ultrasound-assisted emulsification microextraction
Issue Date: 17-Aug-2012
Citation: Ge, D., Lee, H.K. (2012-08-17). A new 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate ionic liquid based ultrasound-assisted emulsification microextraction for the determination of organic ultraviolet filters in environmental water samples. Journal of Chromatography A 1251 : 27-32. ScholarBank@NUS Repository. https://doi.org/10.1016/j.chroma.2012.06.048
Abstract: A novel microextraction approach termed ionic liquid based ultrasound-assisted emulsification microextraction (IL-USAEME) combined with high-performance liquid chromatography-ultraviolet (HPLC-UV) was developed for the preconcentration and detection of organic ultraviolet (UV) filters in environmental water samples. An ionic liquid (IL) was used in place of an organic solvent as in conventional USAEME. In the study, orthogonal array designs (OAD) were employed for the optimization of the extraction parameters: type of IL, pH of the sample, extraction volume, ultrasonic time and salt concentration. In the first step, a mixed level OAD matrix, OA 16 (4 1×2 12) was employed for the initial optimization. Based on the results of the first step, an ultra-hydrophobic IL, 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate was chosen as the IL extractant and sample pH was set at a value of 3. Ultrasonic time, extraction volume and salt concentration were further optimized in the second step by an OA 16 (4 5) matrix. Under the latter optimized conditions, calibration curves with coefficients of estimation higher than 0.997 over the concentration range of 5 and 1000ng/ml, and the relative standard deviations for six replicates of the extraction from 2.6 to 6.6% were obtained. The limits of detection for four organic UV filters were between 0.5 and 1ng/ml. The validated technique was applied to the analysis of organic UV filters in environmental water samples. © 2012 Elsevier B.V.
Source Title: Journal of Chromatography A
URI: http://scholarbank.nus.edu.sg/handle/10635/92956
ISSN: 00219673
DOI: 10.1016/j.chroma.2012.06.048
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

25
checked on Jun 19, 2018

WEB OF SCIENCETM
Citations

23
checked on Jun 11, 2018

Page view(s)

39
checked on Jun 1, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.