Development of an ionic liquid-based dispersive liquid-liquid micro-extraction method for the determination of phthalate esters in water samples

2011 ◽  
Vol 34 (13) ◽  
pp. 1503-1507 ◽  
Author(s):  
Chen Sha ◽  
Zhong Yi-Sheng ◽  
Cheng Shui-Yuan ◽  
Qian Tian ◽  
Sun Hao
Keyword(s):  
Ionic Liquid ◽  
Water Samples ◽  
Extraction Method ◽  
Phthalate Esters

Ionic liquid-based ultrasound-assisted emulsification microextraction for the determination of ranitidine in water samples and pharmaceutical preparations

2020 ◽  
Vol 44 (27) ◽  
pp. 11490-11497
Author(s):  
Ilona Kiszkiel-Taudul ◽  
Barbara Starczewska ◽  
Anna Jabłońska
Keyword(s):  
Ionic Liquid ◽  
Receptor Antagonist ◽  
Water Samples ◽  
Extraction Method ◽  
Pharmaceutical Preparations ◽  
Aqueous Samples ◽  
Ultrasound Assisted ◽  
Emulsification Microextraction

A new extraction method is proposed for the isolation of the histamine H2 receptor antagonist ranitidine (RNT) from aqueous samples.

scholarly journals Determination of cobalt in water samples by atomic absorption spectrometry after pre-concentration with a simple ionic liquid-based dispersive liquid-liquid micro-extraction methodology

2010 ◽  
Vol 8 (3) ◽  
pp. 617-625 ◽  
Author(s):  
Hossein Abdolmohammad-Zadeh ◽  
Elnaz Ebrahimzadeh
Keyword(s):  
Ionic Liquid ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Water Samples ◽  
Limit Of Detection ◽  
Absorption Spectrometry ◽  
Experimental Conditions ◽  
Flame Atomic Absorption ◽  
Relative Standard

AbstractA rapid dispersive liquid-liquid micro-extraction (DLLME) methodology based on the application of 1-hexylpyridinium hexafluorophosphate [C6py][PF6] ionic liquid (IL) as an extractant solvent was applied for the pre-concentration of trace levels of cobalt prior to determination by flame atomic absorption spectrometry (FAAS). 1-Phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) was employed as a chelator forming a Co-PMBP complex to extract cobalt ions from aqueous solution into the fine droplets of [C6py][PF6]. Some effective factors that influence the micro-extraction efficiency include the pH, the PMBP concentration, the amount of ionic liquid, the ionic strength, the temperature and the centrifugation time which were investigated and optimized. In the optimum experimental conditions, the limit of detection (3s) and the enrichment factor were 0.70 µg L−1 and 60, respectively. The relative standard deviation (RSD) for six replicate determinations of 50 µg L−1 Co was 2.36%. The calibration graph using the pre-concentration system was linear at levels 2–166 µg L−1 with a correlation coefficient of 0.9982. The applicability of the proposed method was evaluated by the determination of trace amounts of cobalt in several water samples.

Ionic liquid magnetic bar microextraction and HPLC determination of carbamate pesticides in real water samples

2012 ◽  
Vol 179 (3-4) ◽  
pp. 193-199 ◽  
Author(s):  
Sha Peng ◽  
Jing Xiao ◽  
Jing Cheng ◽  
Miao Zhang ◽  
Xiaoyan Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Water Samples ◽  
Hplc Determination ◽  
Carbamate Pesticides ◽  
Real Water Samples

Determination of Organochlorine Pesticides in Water Samples through Hollow Fiber Membrane-Liquid Phase Microextraction Using Ionic Liquid Material as Extractant

2013 ◽  
Vol 675 ◽  
pp. 260-263 ◽  
Author(s):  
Du Shu Huang ◽  
Ya Shun Chen ◽  
He Ping Yan ◽  
Na Wu ◽  
Wei Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Phase ◽  
Organochlorine Pesticides ◽  
Hollow Fiber ◽  
Water Samples ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Liquid Phase Microextraction ◽  
Liquid Material

A novel method for determination of organochlorine pesticides residuals (2,4-DDT and 4,4-DDT) in water samples through hollow fiber membrane-liquid phase microextraction using ionic liquid material as extractant coupled with high performance liquid chromatography has been developed. The effect of extraction parameters including pH of the feed solution, stirring rate and extraction time was investigated. The proposed method provided enrichment efficiency of 323 and 289 for 2,4-DDT and 4,4-DDT respectively. The method had good linear range of 0.5-50 μg /L and the limits of detection of the pesticides were 0.1 μg /L.

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