Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop Combined With Counter-Electroosmotic Flow Normal Stacking Mode in Capillary Electrophoresis for the Determination of Bisphenol a in Water and Urine Samples

Alshana, Usama; Lubbad, Ibrahim; Göǧer, Nilgün Günden; Çok, İsmet; Tamer, Uğur; Ertaş, Nusret

doi:10.1080/10826076.2012.725700

Cited by 15 publications

(9 citation statements)

References 41 publications

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“…In the past two decades, a number of analytical methods have been developed for the determination of BPA in human bio-specimens (Cao 2012;Alshana et al 2013). In this study, the levels of the free and conjugated BPA were determined quantitatively with the sensitive and robust liquid chromatography-tandem mass spectrometry method in human urine with only a single injection.…”

Section: Resultsmentioning

confidence: 99%

Determination of urinary levels of Bisphenol A in a Turkish population

Battal

Çok

Unlusayin

et al. 2014

Environ Monit Assess

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Bisphenol A (BPA) is one of the environmental endocrine disrupting chemicals that is widely used in common consumer products. The aim of this study was to report the total urinary BPA concentrations (free plus conjugated) in 200 urine samples (children: 57; male: 74; female: 69) obtained from residents of a Mediterranean city, Mersin. Analyses were performed by high-performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS) and for assessing environmental exposure to free BPA and its major metabolite bisphenol A glucuronide (BPAG) in human urine were determinated. Our results indicated that the free BPA and BPAG concentrations were in the range of 0.06-0.99 μg/g creatinine and 0.24-615 μg/g creatinine, respectively. No statistically significant difference obtained in BPA concentrations between genders (male and female) or domicile of residence (rural and urban) (p > 0.05). In our study, the mean level of detected free BPA was 0.46 μg/g creatinine in the urban area and 0.37 μg/g creatinine in the rural area. The average amount of BPAG was 60.56 μg/g creatinine in the urban area and 30.28 μg/g creatinine in the rural area. The data demonstrate that determined amount of total BPA in the present study is lower than the results of similar studies conducted in developed countries. There is no data about the levels of BPA in humans and environment in Turkey. Because of this reason, present study is very important since it is the first study in Turkey which determined the concentrations of free BPA and total BPA in human.

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Section: Resultsmentioning

confidence: 99%

Determination of urinary levels of Bisphenol A in a Turkish population

Battal

Çok

Unlusayin

et al. 2014

Environ Monit Assess

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“…Alshana et al. published a method of determination of bisphenol A in water and urine using DLLME combined with solidification of a floating organic drop. The final aqueous extract was analyzed by CZE using a 25mM borate buffer at pH 9.3 in 5.0% methanol, with application of FASI under counter‐EOF.…”

Section: Kohlrausch Adjustment Of Concentrationmentioning

confidence: 99%

Contemporary sample stacking in analytical electrophoresis

et al. 2014

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This contribution is a methodological review of the publications about the topic from the last 2 years. Therefore, it is primarily organized according to the methods and procedures used in surveyed papers and the origin and type of sample and specification of analytes form the secondary structure. The introductory part about navigation in the architecture of stacking brings a brief characterization of the various stacking methods, with the description of mutual links to each other and important differences among them. The main body of the article brings a survey of publications organized according to main principles of stacking and then according to the origin and type of the sample. Provided that the paper cited gave explicitly the relevant data, information about the BGE(s) used, procedure, detector employed, and reached LOD and/or concentration effect is given. The papers where the procedure used is a combination of diverse fragments and parts of various stacking techniques are mentioned in a special section on combined techniques. The concluding remarks in the final part of the review evaluate present state of art and the trends of sample stacking in CE.

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“…In addition, the proposed technique requires smaller sample size and it is time-effective as compared with SPE-DLLME-SFO demonstrated by Sadeghi et al (2016). The proposed technique, DLLME-SFO also offers higher sensitivity for the analysis of BPA when the quantification is performed using high performance liquid chromatography coupled with ultraviolet detection, instead of using capillary electrophoresis (Alshana et al 2013).…”

Section: Introductionmentioning

confidence: 98%

Rapid Extraction of Bisphenol A by Dispersive Liquid-liquid Microextraction based on Solidification of Floating Organic

Saw¹,

Shan²,

Mee³

et al. 2017

JSM

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Bisphenol A is an endocrine disruptor with widespread applications, especially in the production of polycarbonate and epoxy resins. Dispersive liquid-liquid microextraction based on solidification of floating organic technique has been developed for the extraction of bisphenol A from water and soft drink. The 1-undecanol has been applied as the extraction solvent because of its low density and melting point and high affinity to the analyte. The technique offered rapid and simple analysis as the 1-undecanol was homogeneously dispersed in the sample solution to speed the extraction and the collection of extraction solvent was simplified by centrifugation, cooling and melting steps.

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Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop Combined With Counter-Electroosmotic Flow Normal Stacking Mode in Capillary Electrophoresis for the Determination of Bisphenol a in Water and Urine Samples

Cited by 15 publications

References 41 publications

Determination of urinary levels of Bisphenol A in a Turkish population

Determination of urinary levels of Bisphenol A in a Turkish population

Contemporary sample stacking in analytical electrophoresis

Rapid Extraction of Bisphenol A by Dispersive Liquid-liquid Microextraction based on Solidification of Floating Organic

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