Results 71 to 80 of about 265,312 (219)

Quantification of PCBs in environmental samples. Comparison of results obtained with different analytical instruments (GC-ECD, GC-MS) and standards

, 1991
Polychlorinated biphenyls have been determined in sediments, macroalgae, mussels and worms sampled in the lagoon of Venice, Italy. Sample preparation included hexane extraction, clean-up with sulphuric acid, Florisil and copper and separation from ...
PAVONI, Bruno, PAVONI B, SFRISO, Adriano, RACCANELLI S, SFRISO A., RACCANELLI, S   +5 more
core   +2 more sources

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

Mass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source

Izokromán származékok ECD és VCD vizsgálata DFT/TD-DFT számításokkal

, 2023
Dolgozatomban a Szerves Kémiai Tanszéken előállított három izokromán származékot vizsgáltam kiroptikai módszerekkel. Az abszolút konfiguráció megerősítésén és meghatározásán túl vizsgáltam a VCD alakalmazhatóságát 8 elméletileg lehetséges diasztereomer ...
Kovács, Gergő
core  

Development of a SPME-GC-ECD methodology for selected pesticides in must and wine samples [PDF]

Fresenius' Journal of Analytical Chemistry, 2001
A method for the determination of some pesticide residues in must and wine samples was developed using solid-phase microextraction (SPME) and gas chromatography-electron capture detection (GC/ECD). The procedure only needs dilution as sample pre-treatment and is therefore simple, fast and solvent-free.
Correia, Manuela, Delerue-Matos, Cristina, Matos, Arminda   +2 more
openaire   +3 more sources

Heterogeneous Multilayer Nanopores via Chemically Tuned Dielectric Breakdown for Single‐Molecule Sensing

Small, EarlyView.
A scalable fabrication method based on chemically tuned controlled dielectric breakdown (CT‐CDB) enables heterogeneous multilayer nanopores integrating SiNx with 2D materials such as hBN, MoS2, and graphene. The resulting nanopores exhibit distinct electrokinetic behaviors and low noise, allowing structure‐dependent single‐protein sensing.
Chaoming Gu, Kamruzzaman Joty, Navod Thyashan, Ivan Vlassiouk, Liam Collins, Xingye Zhang, Christopher T. Nelson, Nathan Taton, Sangyoup Lee, Min Jun Kim   +9 more
wiley   +1 more source

Preliminary study of triclosan analysis: A GC/ECD optimization

IOP Conference Series: Earth and Environmental Science
Abstract Triclosan is one of emerging contaminants with antimicrobial and disinfection properties. It is commonly used in soaps, toothpastes, detergents, hand sanitizers, disinfectants, and other personal care products. Triclosan is ubiquitous in environmental samples and its concentration in natural waters is drastically increase owing ...
M M Pitoi, R Yusiasih, A Syampurwadi, D R Wulan, H Rusli, M B Amran   +5 more
openaire   +1 more source

The Role of Stationary Phase Selection on Performance For Explosives Analysis Using GC-ECD [PDF]

Journal of Chromatographic Science, 2010
Gas chromatography with electron capture detection (GC-ECD) analysis of explosive-related nitro organic compounds was performed using four different column stationary phases with the focus being on their impact on analyte stability and transfer efficiency during analysis. All four columns used were 6 m x 0.53 mm, and the four stationary phases were a 1.
Roderick R, Kunz, Kerin E, Gregory, Dennis, Hardy   +2 more
openaire   +2 more sources

Organic and Inorganic Pollutants, Oxidative Stress Biomarkers, and Electrophoretic Protein Profiles in an Endangered Thresher Shark (Alopias vulpinus) From Southeastern Brazil: A Case Study

Environmental Toxicology, EarlyView.
ABSTRACT A comprehensive screening of different environmental contaminants (total metals, thermostable metal fractions associated with detoxification, and persistent organic pollutants) was conducted in an endangered common thresher shark (Alopias vulpinus ) individual incidentally captured in southeastern Brazil.
Sidney Fernandes Sales Junior, Amanda Pontes Lopes, Heloíse Martins de Souza, Regina Fonseca, Enrico Mendes Saggioro, Francielli Monteiro Casanova, Kamila Cezar Gramlich, Tatiana Dillenburg Saint'Pierre, Carlos German Massone, Renato Carreira, Rachel Ann Hauser‐Davis   +10 more
wiley   +1 more source

Determination of haloethers in water with dynamic hollow fiber liquid-phase microextraction using GC-FID and GC-ECD

, 2011
[[abstract]]Dynamic hollow fiber liquid-phase microextraction (HF-LPME) coupled with gas chromatography with flame ionization detection (GC-FID) and GC-electron capture detecion (GC-ECD) was used for quantification of toxic haloethers in lake water.
Chiang,Jing-Shan;Huang,Shang-Da
core   +1 more source

Influência dos constituintes químicos dos extratos de diferentes matrizes na resposta cromatográfica de agrotóxicos Influence of the chemical constituents of extracts from different matrices in the pesticide chromatographic response

Química Nova, 2010
Multiresidue methods for pesticides monitoring by GC are commonly employed, however, it is well known that the presence of compounds of the matrix introduces errors during the quantiûcation.
Gevany Paulino de Pinho, Flaviano Oliveira Silvério, Antônio Augusto Neves, Maria Eliana L. R. Queiroz, Maria Antônia V. M. Starling   +4 more
doaj   +1 more source