Results 21 to 30 of about 653,801 (297)

Microextraction for ambient ionization mass spectrometry analysis

open access: yesAdvances in Sample Preparation, 2022
Ambient ionization allows desorption of molecules and formation of ions directly from samples in native environment. Compared with traditional ionization techniques, it has unique features of simplicity and convenience, thus has attracted considerable ...
Yijing Liu, Yuhan Shang, Qiang Ma
doaj   +1 more source

Detection of nanoparticles by means of reflection electron energy loss spectroscopy depth profiling [PDF]

open access: yes, 2013
The various studies of nanoparticles are of great importance because of the wide application of nanotechnology. The shape and structure of the nanoparticles can be determined by transmission electron microscopy (TEM) and their chemistry by electron ...
M Menyhard, Möller W., Powell C J
core   +1 more source

Análise química da biomassa - uma revisão das técnicas e aplicações

open access: yesQuímica Nova, 2014
Use of biomass as an alternative to nonrenewable feedstock for energy, materials, and chemicals is currently a prominent theme for industry and R Countries like Brazil, USA, and Germany are spending resources and efforts to promote a green economy based ...
Sílvio Vaz Júnior   +1 more
doaj   +1 more source

Liquid chromatography-tandem mass spectrometry - Application in the clinical laboratory [PDF]

open access: yes, 2003
This review provides a concise survey of liquid chromatography tandem mass spectrometry (LCTMS) as an emerging technology in clinical chemistry. The combination of two mass spectrometers with an interposed collision cell characterizes LCTMS as an ...
Ford RE   +7 more
core   +1 more source

An overview of the Brazilian contributions to Green Analytical Chemistry

open access: yesAnais da Academia Brasileira de Ciências, 2019
: Green Analytical Chemistry (GAC) is a research field that seeks for more sustainable analytical approaches to minimize the toxicity and amounts of wastes without hindering the analytical performance.
MARIANA R. GAMA   +3 more
doaj   +1 more source

Feasibility of Mass-Spectrometry to Lower Cost and Blood Volume Requirements for Assessment of B Vitamins in Patients Undergoing Bariatric Surgery

open access: yesMetabolites, 2020
Bariatric surgery induces deficiencies in a combination of B vitamins. However, high costs and a large blood volume requirement are barriers to routine screening.
Seth Armah   +2 more
doaj   +1 more source

Recent Analytical Approaches for the Study of Bioavailability and Metabolism of Bioactive Phenolic Compounds

open access: yesMolecules, 2022
The study of the bioavailability of bioactive compounds is a fundamental step for the development of applications based on them, such as nutraceuticals, functional foods or cosmeceuticals.
Álvaro Fernández-Ochoa   +5 more
doaj   +1 more source

A literature review of analytical techniques for materials characterisation of painted textiles - Part 2: spectroscopic and chromatographic analytical instrumentation [PDF]

open access: yes, 2017
Part Two of this Literature Review of analytical techniques for materials characterisation of painted textiles focusses on the application of vibrational and x-ray spectroscopic and chromatographic techniques used in the analysis of painted textiles to ...
Lennard, Frances   +2 more
core   +1 more source

Applications of Direct Injection Soft Chemical Ionisation-Mass Spectrometry for the Detection of Pre-blast Smokeless Powder Organic Additives [PDF]

open access: yes, 2019
Analysis of smokeless powders is of interest from forensics and security perspectives. This article reports the detection of smokeless powder organic additives (in their pre-detonation condition), namely the stabiliser diphenylamine and its derivatives 2-
A Jordan   +45 more
core   +2 more sources

Dual-barrel conductance micropipet as a new approach to the study of ionic crystal dissolution kinetics [PDF]

open access: yes, 2013
A new approach to the study of ionic crystal dissolution kinetics is described, based on the use of a dual-barrel theta conductance micropipet. The solution in the pipet is undersaturated with respect to the crystal of interest, and when the meniscus at ...
Alex W. Colburn   +60 more
core   +1 more source

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