Results 61 to 70 of about 528,026 (297)

Chemical Ionization Mass Spectrometry: Fundamental Principles, Diverse Applications, and the Latest Technological Frontiers

Mass Spectrometry Reviews, EarlyView.
ABSTRACT The review examines the evolution of chemical ionization mass spectrometry (CI‐MS), a technique developed in 1966 by Field and Munson. CI is a soft‐ionization method that produces more intense molecular ions with less fragmentation than electron ionization (EI).
Malvika Dutt, Adriana Arigò, Giorgio Famiglini, Pierangela Palma, Achille Cappiello   +4 more
wiley   +1 more source

Stir Bar Sorptive Extraction - New Approach for the Determination of Some Beer Flavours.

Kvasný průmysl, 2008
For the determination of beer flavours well-established methods require sample preparation steps such as liquid/liquid extraction, solid phase extraction or distillation techniques. During the past years the microextraction procedures become popular e. g.
Tomáš HORÁK, Jiří ČULÍK, Marie JURKOVÁ, Pavel ČEJKA, Vladimír KELLNER   +4 more
doaj   +1 more source

Application of Dispersive Liquid-Liquid Microextraction in Forensic Toxicological Analysis [PDF]

Fayixue Zazhi, 2019
Currently, the main sample pretreatment methods for forensic toxic analysis are liquid-liquid extraction （LLE） and solid-phase extraction （SPE）. As a simple, convenient, and low-cost LLE method, dispersion liquid-liquid microextraction （DLLME） has high ...
YANG Yu, ZHANG Yun-feng, LI Xin-tong，et al.
doaj   +1 more source

Solid-phase microextraction for bioconcentration studies according to OECD TG 305 [PDF]

, 2012
An important aim of the European Community Regulation on chemicals and their safe use is the identification of (very) persistent, (very) bioaccumulative, and toxic substances.
Böhm, Leonard, Düring, Rolf-Alexander, Schlechtriem, Christian   +2 more
core   +2 more sources

Dereplicative Combination of HPLC/DAD/MS and 2D NMR to Identify Lichexanthone Isomers in Lichen Extracts

Phytochemical Analysis, EarlyView.
ABSTRACT Introduction Lichexanthones are the major xanthones found in lichens. They present a high degree of isomerism, which makes their identification tedious. Xanthones are known to occur in lichens according to chemosyndromes, and these compounds act as chemotaxonomic markers.
Solenn Ferron, Marylène Chollet‐Krugler, Hermann Pinson, Rania Marzoug, Philippe Uriac, Françoise Lohézic‐Le Dévéhat   +5 more
wiley   +1 more source

Applications of Microextraction Technology for the Analysis of Alcoholic Beverages Quality: Current Perspectives and Future Directions

Foods
Alcoholic beverages are loved by the majority of consumers because of their diverse characteristics and rich nutritional value; thus, ensuring their quality is necessary for maintaining the rapid development of the alcoholic beverage industry.
Yue Qiu, Qi Deng, Yongqing Zhang, Baoguo Sun, Wenxian Li, Wei Dong, Xiaotao Sun   +6 more
doaj   +1 more source

The recent developments in dispersive liquid–liquid microextraction for preconcentration and determination of inorganic analytes

Journal of Saudi Chemical Society, 2014
Recently, increasing interest on the use of dispersive liquid–liquid microextraction (DLLME) developed in 2006 by Rezaee has been found in the field of separation science.
H.M. Al-Saidi, Adel A.A. Emara
doaj   +1 more source

Progress in Surface‐Enhanced Raman Scattering‐Based Volatile Organic Compounds Detection: Materials, Application, and Prospects

Rare Metals, EarlyView.
ABSTRACT The detection of volatile organic compounds (VOCs) holds significant implications in environmental monitoring and disease diagnosis. Traditional gas detection technologies are constrained by complex operation and high cost, thereby failing to satisfy real‐time detection demands.
Yuening Wang, Lin Qiu, Jian Yu, Wen Ma, Xiaoyu Song, Mingjian Zhang, Yujiao Xie, Aochi Liu, Li Sun, Xiangyu Meng, Jie Lin, Xiaotian Wang   +11 more
wiley   +1 more source

Recent Advances in Sample Preparation for Cosmetics and Personal Care Products Analysis

Molecules, 2021
The use of cosmetics and personal care products is increasing worldwide. Their high matrix complexity, together with the wide range of products currently marketed under different forms imply a challenge for their analysis, most of them requiring a sample
Maria Celeiro, Carmen Garcia-Jares, Maria Llompart, Marta Lores   +3 more
doaj   +1 more source

Headspace analysis of natural yoghurt using headspace solid phase microextraction : a thesis presented in partial fulfilment of the requirements for the degree of Master of Philosophy in Food Technology at Massey University (Turitea Campus), Palmerston North, New Zealand [PDF]

, 2001
The Solid Phase Microextraction (SPME) method was originally developed to extract volatile and semivolatile compounds from wastewater samples but has since been applied to flavour compounds in foods and beverages.
Sivalingam-Reid, Geedha
core