Results 41 to 50 of about 1,341 (180)

Determination of Trace Amounts of Lead with ETAAS After Single Drop Microextraction and Dispersive Liquid Liquid Microextraction Methods

E3S Web of Conferences, 2013
Two liquid-phase microextraction procedures, single-drop microextraction (SDME) and dispersive liquid–liquid microextraction (DLLME), have been developed for the determination of lead by electrothermal atomic absorption spectrometry (ETAAS). Both methods
Efeçınar M., Çakır P., Şatıroğlu N.   +2 more
doaj   +1 more source

Schiff Base‐UiO66 Composite‐based Dispersive Micro Solid‐Phase Extraction of Pesticides From Fruit Juices Combined With Dispersive Liquid‐Liquid Microextraction Prior to Gas Chromatography‐Flame Ionisation Detection

Analytical Science Advances, Volume 7, Issue 2, December 2026.
ABSTRACT A dispersive micro solid‐phase extraction method was introduced using a Schiff base‐UiO66 nanocomposite as the adsorbent in the extraction of multi‐class pesticide residues in pear, cherry, grape, and apricot juices. The extraction procedure was hyphenated with a liquid‐phase microextraction procedure, providing a high preconcentration factor ...
Behnam Hosseininezhad, Mahdi Bomorovat, Mahboob Nemati, Mir Ali Farajzadeh, Ramin Atazadeh, Mohammad Reza Afshar Mogaddam   +5 more
wiley   +1 more source

Determination of Organochlorine Pesticides in Green Leafy Vegetable Samples via Fe3O4 Magnetic Nanoparticles Modified QuEChERS Integrated to Dispersive Liquid-Liquid Microextraction Coupled with Gas Chromatography-Mass Spectrometry

Journal of Analytical Methods in Chemistry, 2021
A fast method based on Fe3O4 magnetic nanoparticles (Fe3O4 MNPs) modified QuEChERS integrated to dispersive liquid-liquid microextraction (DLLME) coupled with gas chromatography-mass spectrometry was established for the determination of 8 organochlorine ...
Ling Yu, Guiquan Guo, Jun Zhao, Linnan Zhao, Aiqing Xia, Xu He, Cuijuan Xing, Lili Dong, Fang Wang   +8 more
doaj   +1 more source

Green and Rapid Determination of Phthalates in Mineral Water From Virgin and Recycled PET Bottles

Journal of Mass Spectrometry, Volume 61, Issue 8, August 2026.
ABSTRACT This study investigates the presence and quantification of phthalates released into mineral waters from virgin and recycled polyethylene terephthalate (PET) bottles. A green, solvent‐free analytical method based on solid‐phase microextraction (SPME) coupled with gas chromatography–mass spectrometry (GC/MS) was developed and validated to detect
Claudia Lino, Serena Indelicato, David Bongiorno, Fabio D'Agostino, Giuseppe Avellone   +4 more
wiley   +1 more source

Recent Advances in the Use of Natural Deep Eutectic Solvents for Natural Product Sample Preparation: Focus on Purification, Characterization, and Sustainability

Journal of Separation Science, Volume 49, Issue 7, July 2026.
ABSTRACT This review examines recent advances in the use of natural deep eutectic solvents (NaDES) for natural product sample preparation, with emphasis on extraction, purification, analytical compatibility, and sustainability. NaDES emerge as versatile, tunable, and biocompatible media that enhance the recovery and stability of diverse phytochemicals ...
Valeria Cedeño‐Fierro, Juan Felipe Grisales‐Mejía, Harlen Gerardo Torres Castañeda, Jose A. Mendiola   +3 more
wiley   +1 more source

Simultaneous Chloramphenicol and Florfenicol Determination by A Validated DLLME-HPLC-UV Method in Pasteurized Milk.

Iranian journal of pharmaceutical research : IJPR, 2016
The antibiotic residues in milk are a well-known serious problem and pose several health hazards to consumers. We have described a simple, rapid, and inexpensive DLLME-HPLC/UV technique for the extraction of chloramphenicol and florfenicol residues in milk samples. Under the optimum conditions, linearity of the method was observed over the range 0.02-0.
Karami-Osboo, Rouhollah, Miri, Ramin, Javidnia, Katayoun, Kobarfard, Farzad   +3 more
openaire   +2 more sources

Development of a Sustainable and Practical Natural Deep Eutectic Solvent‐based Ultrasound‐assisted Microextraction Method for Determining Fipronil and Its Degradation Products in Brewed Coffee

Journal of Separation Science, Volume 49, Issue 5, May 2026.
ABSTRACT Fipronil and its degradation products, such as fipronil sulfide and fipronil desulfinyl, exhibit toxicological concerns and require reliable analytical methods for monitoring in complex matrices such as brewed coffee. This study aimed to develop a novel ultrasound‐assisted liquid–liquid microextraction approach using a natural deep eutectic ...
Natália Stram Bierhals, Emilly Santos de Castro, Sofia Aquino Monteiro, Vanusa Regina Lando, Josias Merib   +4 more
wiley   +1 more source

A Natural Monoterpene Enol for Dispersive Liquid–Liquid Microextraction Based on Solidification of Floating Organic Droplets for Determination of Benzophenone Compounds in Water Samples

Separations, 2022
In the current study, an effective and simple procedure of extraction for the four benzophenone compounds from water samples was achieved by dispersive liquid–liquid microextraction (DLLME) based on the solidification of floating organic droplets (SFO ...
Xian Zhang, Luyun Zhang, Dan Zheng, Zhenzhen Xia, Maomin Peng, Danling Sun, Xizhou Hu, Xitian Peng   +7 more
doaj   +1 more source

Heat‐Induced Toxicants: Sensory Appeal Distracts Consumers' Attention From Potential Toxicological Risks of Thermally Processed Foods

Food Science &Nutrition, Volume 14, Issue 4, April 2026.
The central paradox of thermal processing of foods. (A) The application of heat (e.g., frying, baking, grilling) to food initiates complex chemical reactions, most notably the Maillard reaction and thermal degradation of protein, lipids, and carbohydrate. (B) These reactions create a desirable sensory experience characterized by enticing aromas, golden‐
Joachim Dotto Matondo, Abdulsudi Issa‐Zacharia   +1 more
wiley   +1 more source

Enantioselective Determination of Chiral Fungicides in Food Samples Using Automated Dispersive Microextraction Coupled With UHPLC–MS/MS

Food Frontiers, Volume 7, Issue 2, March 2026.
The use of fatty acids and bio‐derived solvents eliminates the need for toxic solvents and, when combined with automated workstations, enables parallel sample processing, thereby improving extraction efficiency and reducing human error. ABSTRACT An enantioselective analytical method based on automated dispersive liquid–liquid microextraction (DLLME ...
Yuxin Wang, Yulin Wang, Yuanjun Nie, Jizhen Fu, Yukun Yang, Li Li, Xu Jing   +6 more
wiley   +1 more source