Trace analysis of quercetin in tea samples by HPLC-DAD system by means of a new nanocomposite including magnetic core-shell

Ulusoy, Songül; Yılmaz, Erkan; Erbaş, Zeliha; Ulusoy, Halil İ̇brahim; Soylak, Mustafa

doi:10.1080/01496395.2019.1623254

Cited by 14 publications

(4 citation statements)

References 37 publications

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“…Several analytical methods were proposed for the quantification of quercetin in different samples such as red wine, fruit juice, herbal medicine, food and vegetable by applying various detection systems including spectrophotometry [6], HPLC coupled with UV detection [7], square wave voltammetry [8], differential pulse voltammetry [9], UHPLC method with MS/MS [10], fluorescence detection [11] and HPLC coupled diode-array detector [12]. Spectrophotometry has advantages such as cheaper, easy to use and shorter measurement time compared to the above techniques.…”

Section: Introductionmentioning

confidence: 99%

“…But it exhibits low sensitivity and selectivity. In order to eliminate these problems, an efficient separation and preconcentration method is applied before analysis [12]. The main goal of sample preparation is to transfer the studied analytes from a complex matrix solution to a more compatible solution in order to reach the low detection limit with an analytical technique [13].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of an ultrasound‐assisted alcohol‐based deep eutectic solvent dispersive liquid‐phase microextraction for separation and preconcentration of quercetin in wine and food samples with response surface methodology

Altunay

Elık

Ünal

2021

J of Separation Science

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We optimized ultrasound-assisted alcohol-based deep eutectic solvent dispersive liquid-phase microextraction for separation and preconcentration of quercetin in wine and food samples by experimental design based on central composite design. Five different alcohol-based deep eutectic solvents were prepared and tested for quercetin extraction. The effect of important parameters and matrix components were optimized. After optimization, the determination of quercetin was performed at 385 nm using spectrophotometry. Analytical data such as detection limit, working range and preconcentration factor were found as 6.1 μg/L, 20-850 μg/L, and 120, respectively. The selectivity of the optimized extraction conditions for quercetin was investigated in the presence of different matrices. The validation of the method was investigated by reproducibility, repeatability and recovery studies, as well as by comparing the analytical results obtained from real samples with the reference method. Lastly, the recommended procedure was successfully applied for the extraction and quantification of quercetin in wine and food samples.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of an ultrasound‐assisted alcohol‐based deep eutectic solvent dispersive liquid‐phase microextraction for separation and preconcentration of quercetin in wine and food samples with response surface methodology

Altunay

Elık

Ünal

2021

J of Separation Science

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“…Magnetite nanoparticles have recently been used as cost-effective adsorbents for the preconcentration of organic compounds in the environment samples due to their large surface area, superparamagnetism, and simple synthesis [10][11][12][13][14]. Due to high magnetization, they can be easily separated in an external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Application of micro-nanostructured magnetite in separating tetrabromobisphenol A and hexabromocyclododecane from environmental water by magnetic solid phase extraction

Wang

Zhang

et al. 2021

PLoS ONE

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Two typical brominated flame retardants (BFRs), namely, tetrabromobisphenol A (TBBPA) and hexabromocyclododecane (HBCD), were persistent organic pollutants widely detected in various environmental media. This study aimed to successfully synthesize micro-nano-structured magnetite particles (MNMPs) with surface modification by citric acid molecules. The synthesized composites served as an adsorbent for extracting TBBPA and HBCD from environmental water samples followed by gas chromatography–mass spectrometry analysis. The obtained MNMPs were characterized in terms of crystal structure, morphology, size distribution, hydrophobic and hydrophilic performance and magnetism. The results indicated that the MNMPs exhibited high surface area, good dispersibility, and strong magnetic responsiveness for separation. The parameters affecting the extraction efficiency were optimized, including sample pH, amount of sorbents, extraction time and desorption conditions. Under the optimum conditions, the recovery was 83.5 and 107.1%, limit of detection was 0.13 and 0.35μg/mL (S/N = 3), and limit of quantification was 0.37 and 0.59 μg/mL (S/N = 10) for TBBPA and HBCD respectively. The relative standard deviations obtained using the proposed method were less than 8.7%, indicating that the MNMP magnetic solid-phase extraction method had advantages of simplicity, good sensitivity and high efficiency for the extraction of the two BFRs from environmental water.

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“…For this, it is applied by interacting with target molecules using magnetic solid phase extraction, which is one of the sample preparation techniques, before the determination process. [13]. Newly, more and more of these utilizations have given the use of hybrid nanoparticles for the selective extraction of trace species from a complex matrix environment [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of new solid phase sorbent for sensitive spectrophotometric determination of Quercetin

Ulusoy

2021

Cumhuriyet Science Journal

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Sensitive and easy applicable analysis of Quercetin molecules was executed whereby solid phase extraction (SPE) and molecular spectrophotometric determination. For the determination of quercetin, an accurate, economical, time-saving and a new environmentally friendly method has been developed with a simple spectrophotometer device available in every laboratory. As a solid-phase sorbent, a new polymer nanocomposite has been synthesized and characterized by Fouirer Transform Infrared Spectroscopy (FT-IR) and Scanned Electron Microscopy (SEM). Experimental solid phase extraction variables have been investigated and optimized step by step, such as pH, adsorption time and desorption conditions, etc. According to optimization results, desorption of quercetin molecules was carried out by 2-propanol solvent and absorbance of eluent solutions were measured as systematic at 255 nm and at 370 nm. However, the best results were obtained at 370 nm wavelength. Therefore, all measurements were made at 370 nm. (LOD) means that the detection limit and (LOQ), the quantitation limit values for quercetin were calculated as 5.97 ng mL -1 and 17.91 ng mL -1 , respectively. Standard addition and recovery experiments were performed as an indicator of the accuracy of the method. The method developed was effectively conducted to model solutions.

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Trace analysis of quercetin in tea samples by HPLC-DAD system by means of a new nanocomposite including magnetic core-shell

Cited by 14 publications

References 37 publications

Optimization of an ultrasound‐assisted alcohol‐based deep eutectic solvent dispersive liquid‐phase microextraction for separation and preconcentration of quercetin in wine and food samples with response surface methodology

Optimization of an ultrasound‐assisted alcohol‐based deep eutectic solvent dispersive liquid‐phase microextraction for separation and preconcentration of quercetin in wine and food samples with response surface methodology

Application of micro-nanostructured magnetite in separating tetrabromobisphenol A and hexabromocyclododecane from environmental water by magnetic solid phase extraction

Synthesis of new solid phase sorbent for sensitive spectrophotometric determination of Quercetin

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