Results 71 to 80 of about 2,590 (173)

A Simple Dispersive Liquid-Liquid Microextraction for the Determination of Copper II in the Water Samples of the Halfaya Oil Field in Maysan

Al-Mustansiriyah Journal of Science
Background: Copper, an important trace element for life on Earth, is crucial to many metabolic processes. This includes its role in the production and breakdown of nucleic acids and the metabolism of proteins, lipids, and carbohydrates.
Anwer S. Salim, Mohammed Z. Thani, Abdull Jabar KH. Atia, Hassan A. Fattah   +3 more
doaj   +1 more source

Optimization of Parallel Artificial Liquid Membrane Extraction for the Determination of Over 50 Psychoactive Substances in Oral Fluid Through UHPLC–MS/MS

Drug Testing and Analysis, Volume 17, Issue 10, Page 1877-1895, October 2025.
This study is related to the development of a microextraction method for the determination of 56 psychoactive substances in oral fluid. Sample clean‐up is obtained by parallel artificial liquid membrane extraction and analyzed by liquid chromatography–tandem mass spectrometry.
Martina Croce, Camilla Montesano, Ilenia Bracaglia, Francesco Bartolini, Marcello Mascini, Dario Compagnone, Manuel Sergi   +6 more
wiley   +1 more source

Ultrasound-Assisted Low-Density Solvent Dispersive Liquid-Liquid Extraction for the Determination of Amphetamines in Biological Samples Using Gas Chromatography-Mass Spectrometry

Journal of Forensic Science and Medicine, 2015
In order to control drug crime effectively, it is necessary to develop selective analytical methods suitable for unambiguous identification and determination of drugs in illicit samples and biological matrices.
Liang Meng, Wenwen Zhang, Pinjia Meng, Yuxian Liu   +3 more
doaj   +1 more source

Effect of the volume of the extraction solvent (CHCl₃) on the enrichment factors of 10 β₂-agonists extracted by DLLME.

, 2015
Effect of the volume of the extraction solvent (CHCl3) on the enrichment factors of 10 β2-agonists extracted by DLLME.
Xiao-Ou Su (466120), Rui-Guo Wang (792917), Pei-Long Wang (792918), Wei Zhang (405), Yang Li (7082)   +4 more
core   +1 more source

Molecularly Imprinted Poly(Trimethylolpropane Triacrylate‐Co‐Ethylene Glycol Dimethacrylate‐Co‐Methacrylic Acid) Monolithic Sorbent for Pipette‐Tip Solid‐Phase Extraction of N‐Nitrosodimethylamine in Medicaments

SEPARATION SCIENCE PLUS, Volume 8, Issue 9, September 2025.
ABSTRACT A novel pipette‐tip solid‐phase extraction method was developed using a molecularly imprinted monolithic sorbent composed of poly(trimethylolpropane triacrylate‐co‐ethylene glycol dimethacrylate‐co‐methacrylic acid) for the selective extraction of N‐nitrosodimethylamine from pharmaceutical formulations.
Allyson Leandro Rodrigues dos Santos, Bruna Bezerra de Melo, Anizio Marcio de Faria   +2 more
wiley   +1 more source

Contactless Conductivity Detection for Capillary Electrophoresis—Developments From 2020 to 2024

ELECTROPHORESIS, Volume 46, Issue 13-14, Page 829-862, July 2025.
ABSTRACT The review covering the development of capillary electrophoresis with capacitively coupled contactless conductivity detection from 2020 to 2024 is the latest in a series going back to 2004. The article considers applications employing conventional capillaries and planar lab‐on‐chip devices as well as fundamental and technical developments of ...
Peter C. Hauser, Pavel Kubáň
wiley   +1 more source

Optimization and validation of methods employing DLLME and DLLME-SFO for simultaneous extraction of pesticides multiclass in mineral water

, 2014
O Rio Grande Sul destaca-se no cenário nacional como grande produtor de diversas culturas, as quais demandam grande quantidade de agrotóxicos das mais diversas classes químicas e toxicidades.
Bolzan, Cátia Marian
core  

Analysis of triazine herbicides using an up-and-down-shaker-assisted dispersive liquid-liquid microextraction coupled with gas chromatography-mass spectrometry

, 2017
In dispersive liquid-liquid microextraction, a few hundred microliters to a few milliliters of water-miscible dispersive solvent are commonly used to assist emulsification in aqueous samples.
Chen, Pai-Shan;Haung, Wan-Yun;Huang, Shang-Da, 陳珮珊   +1 more
core   +1 more source

Desenvolvimento da microextração líquido-líquido diversiva (DLLME) na determinação de chumbo, em águas superficiais seguindo princípios da química verde

, 2022
O uso de técnicas de pré-concentração vem sendo amplamente utilizadas em amostras de elementos considerados traços, tais como impurezas metálicas, em matriz complexas devido à seletividade, eficiência de extração e clean up das amostras, além de gerarem ...
França, Michelle Lorêdo de [UNIFESP]
core  

Liquid Phase and Microwave-Assisted Extractions for Multicomponent Phenolic Pattern Determination of Five Romanian Galium Species Coupled with Bioassays

Molecules, 2019
Background: Galium is a plant rich in iridoid glycosides, flavonoids, anthraquinones, and small amounts of essential oils and vitamin C. Recent works showed the antibacterial, antifungal, antiparasitic, and antioxidant activity of this plant genus ...
Andrei Mocan, Alina Diuzheva, Sabin Bădărău, Cadmiel Moldovan, Vasil Andruch, Simone Carradori, Cristina Campestre, Angela Tartaglia, Marta De Simone, Dan Vodnar, Matteo Tiecco, Raimondo Germani, Gianina Crișan, Marcello Locatelli   +13 more
doaj   +1 more source