Combination of Vortex-Assisted Liquid–Liquid Extraction and Air-Assisted Liquid–Liquid Microextraction for the Extraction of Bisphenol A and Bisphenol B in Canned Doogh Samples

Determination of Very Low Concentration of Bisphenol A in Toys and Baby Pacifiers Using Dispersive Liquid–Liquid Microextraction by In Situ Ionic Liquid Formation and High-Performance Liquid Chromatography

“…Organic solvents as a BPA extracting medium have been extensively studied and used over the years [ 30 , 31 , 32 ]. In recent years, liquid–liquid microextraction techniques have been widely used to extract BPA using different organic solvents, such as benzene [ 33 ], hexane [ 34 ], ethyl acetate [ 35 ] or ethanol [ 36 ]. However, the use of IL as an extracting medium instead of the commonly used organic solvents provides a series of advantages, such as low solubility in water and low viscosity, a double condition which is not easily achieved [ 9 , 10 ].…”

A fast, low-cost and eco-friendly method for routine determination of Bisphenol-A in landfill leachate employing vortex assisted liquid-liquid extraction

“…However, there is a need for nontedious and environmentally friendly methods, employing lower volumes of non-toxic solvents and significant recoveries. Vortex-assisted liquidliquid microextraction (VALLME) is a technique based on emulsification procedure where the extraction applies reduced volumes of a lowdensity solvent into water associated with high energy of vortex mixing [15]. The fine droplets can rapidly extract target analytes from water due to shorter diffusion distance and larger interfacial area.…”

“…Different GC and HPLC setups have already been described. The mass spectrometry (MS), ultraviolet (UV) and fluorescence are detectors frequently used in HPLC, while in GC the MS have been more applied for the detection of BPA [3,5,[10][11][12][13][14][15]. In this work, the usage of HPLC with diode-array detector has been chosen due advantages as the simultaneous acquisition in different wavelengths, improving the separation of peaks, an important factor to be considered when working with complex matrices as leachate [11,14,15].…”

“…The mass spectrometry (MS), ultraviolet (UV) and fluorescence are detectors frequently used in HPLC, while in GC the MS have been more applied for the detection of BPA [3,5,[10][11][12][13][14][15]. In this work, the usage of HPLC with diode-array detector has been chosen due advantages as the simultaneous acquisition in different wavelengths, improving the separation of peaks, an important factor to be considered when working with complex matrices as leachate [11,14,15]. The challenges of controlling the destiny of USW to landfills and aware society of a responsible waste discard is aggravated by the analytical limitations of detection and quantification methods for BPA in complex matrices.…”

Comparação da técnica de microextração líquido-líquido assistida por ar e a microextração líquido-líquido dispersiva para determinação dos principais metabólitos mono-hidroxilados dos hidrocarbonetos policíclicos aromáticos em urina por GC-MS

“…Uma vez que a agitação assistida por vortéx ou por sonificação são empregadas para aumentar a taxa de transferência de massa dos analitos para fase extratora, ao aumentar a área de contato entre eles, ainda necessita da adição do solvente dispersor. Ao comparar a AALLME com os métodos de DLLME de rotina e os métodos aprimorados, fica evidente que o primeiro é mais rápido, simples e de fácil execução, uma vez que exclui o emprego do solvente dispersor (AMINI; KHANDAGHI;MOGADDAM, 2018;FARAJZADEH et al, 2020). Figura 1: Descrição das etapas realizadas no método de extração da DLLME (Fonte: o autor).…”