Results 51 to 60 of about 5,010,052 (177)

Developments in liquid-phase microextraction

, 2003
Summarization: The development of faster, simpler, inexpensive and more environmentally friendly sample-preparation techniques is an important issue in chemical analysis.
N Kalogerakis, E Psillakis
core   +1 more source

Mass Spectrometry in Authentication and Forensic Approaches for Determining the Origin of Hazardous Chemicals

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Identification of a chemical agent yields insights into its physicochemical properties. By examining the intrinsic characteristics and environment of a compound, information about its history can be gathered. The main objective of authentication/forensic approaches to chemicals is to trace the history of the compound's origin, regardless of ...
Carla Orlandi, Grégoire Delaporte, Christine Albaret, Emmanuel Joubert, Anne Bossée, Emilien L. Jamin, Laurent Debrauwer   +6 more
wiley   +1 more source

Liquid-phase microextraction methods

, 2009
Tématem této práce jsou metody kapalinové mikroextrakce. Zabývá se jednotlivými mikroextrakčními technikami a jejich praktickým využitím při analýze organických látek z různých vzorků, především potravin.
Štědrová, Markéta
core   +1 more source

Wildfire Ash Alters Freshwater Crustacean Behavior: Disentangling the Contributions of Suspended Macroparticles and Ash‐Induced Alkalinization

Environmental Toxicology, EarlyView.
ABSTRACT Climate change and anthropogenic ignitions are intensifying wildfire frequency worldwide, elevating the risk of freshwater contamination by ash. In water, dissolved ash releases ions and other toxic constituents that increase pH and alter physicochemical conditions, while suspended ash particles may impose mechanical stress, disrupt behavior ...
Pétterson B. Pereira‐Silva, Diogo R. Pacheco, Gustavo Kirsch, Ronnilda M. G. Araujo, Bianca V. C. Oscar, William G. Matias, Sandro Santos, Bruno R. S. Figueiredo   +7 more
wiley   +1 more source

Performance evaluation of a scent transfer unit for sampling of explosives and their residues to investigate nuisance alerts

Journal of Forensic Sciences, EarlyView.
Abstract Volatile organic compounds associated with explosives such as Composition C‐4 serve as important targets for canine training as well as field analysis. In parallel, 1‐bromooctane (1‐BO) is a benchmark to contextualize canine performance and aid interpretation of results.
Himanshi Upadhyaya, Alexis Hecker, John Goodpaster   +2 more
wiley   +1 more source

Determinação de resíduos de contaminantes orgânicos em matrizes alimentícias e ambientais por microextração em fase líquida suportada por membranas e detecção por LC-MS/MS e GC-ECD [PDF]

, 2012
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Quimica, Florianópolis, 2010Este estudo apresenta o uso da membrana microporosa de polipropileno como suporte para o ...
Bedendo, Gizelle Cristina
core  

Do aphid endosymbiotic bacteria influence parasitoid searching behaviour through changes in aphid honeydew production?

Ecological Entomology, EarlyView.
Hamiltonella defensa infection increases honeydew production in certain aphid genotypes, potentially modifying aphid feeding behaviour. Parasitoid wasps, Aphidius ervi, are more attracted to honeydew from H. defensa‐infected aphids; though larger honeydew amounts may slightly deter searching.
Desiré Macheda, Alexandre Foito, Katharine F. Preedy, Colin J. Alexander, Ankush Prashar, Alison J. Karley   +5 more
wiley   +1 more source

DETERMINATION OF GEOSMIN AND 2-METHYLISOBORNEOL IN WATER BY HEADSPACE LIQUID-PHASE MICROEXTRACTION COUPLED WITH GAS CHROMATOGRAPHY-MASS SPECTROMETRY

, 2011
Geosmin (GSM) and 2-methylisoborneol (MIB) were extracted from water samples, adsorbed in organic solvent microdrop by headspace liquid-phase microextraction (HS-LPME), and were analyzed by gas chromatography-mass spectrometry (GC-MS).
Liu, Dongyan, Lingxin Chen, Wenhui Lu, Jiping Ma, Dongyan Liu, Chen, Lingxin, Li, Jinhua, Ma, Jiping, Song, Zhiwen, Lu, Wenhui, Jinhua Li, Zhiwen Song   +11 more
core   +1 more source

Hollow-Fibre-Supported Dispersive Liquid-Liquid Microextraction for Determination of Atrazine and Triclosan in Aqueous Samples

International Journal of Analytical Chemistry, 2017
We report the application of the dispersive liquid-liquid microextraction coupled to hollow-fibre membrane-assisted liquid-phase microextraction and its application for extraction of atrazine and triclosan. Under optimum conditions, namely, 25 μL of a 1 :
Thabiso Letseka, Mosotho J. George
doaj   +1 more source

Effervescence-Assisted Microextraction—One Decade of Developments

Molecules, 2020
Dispersive microextraction techniques are key in the analytical sample treatment context as they combine a favored thermodynamics and kinetics isolation of the target analytes from the sample matrix.
Guillermo Lasarte-Aragonés, Rafael Lucena, Soledad Cárdenas   +2 more
doaj   +1 more source