Results 41 to 50 of about 4,446,653 (191)

Recent applications of tetramethylammonium hydroxide (TMAH) in the sample preparation for elemental analysis by spectroanalytical techniques

Advances in Sample Preparation
Application of tetramethylammonium hydroxide for the treatment of samples prior to elemental analysis over the last five years is approached in this review article.
Uillian Mozart Ferreira Mata Cerqueira, Juscelia Pereira Santos Alves, Walter Nei Lopes Santos, Bernardo da Silva Pita, Cleber Galvão Novaes, Sulene Alves Araújo, Marcos Almeida Bezerra   +6 more
doaj   +1 more source

Recent trends in microsampling and reduced-volume sample preparation procedures

Advances in Sample Preparation
The emergence of Green Chemistry (GC), Green Analytical Chemistry (GAC), and Green Sample Preparation (GSP) has significantly influenced the evolution of sample preparation techniques.
Miryam Perrucci, Erika Maria Ricci, Marcello Locatelli, Imran Ali, Fotou R. Mansour, Abuzar Kabir, Halil I. Ulusoy   +6 more
doaj   +1 more source

Exploring the extraction capabilities of natural cyclodextrin-nanosponges: The improvement moving from α- to γ-cyclodextrin-based polymers

Advances in Sample Preparation
Cyclodextrins (CD) are cyclic oligosaccharides known for their capability to form inclusion complexes with molecules of appropriate size. CDs can also be used as polyfunctional monomers in polymerization reactions to prepare specialised sorbents with ...
Nina Felli, Davide Filardi, Riccardo Sergi, Luisa Maria Migneco, Massimo Giuseppe De Cesaris, Lorenzo Antonelli, Iolanda Francolini, Alessandra Gentili   +7 more
doaj   +1 more source

Greener solvents in extraction of proteins and peptides

Advances in Sample Preparation
The sample pretreatment still represents a fundamental aspect of any analytical workflow, and the implementation of sustainable and efficient extraction of proteins is essential to satisfy the increasing requirements for high-quality extraction of ...
Katarína Maráková
doaj   +1 more source

Microextraction by packed sorbent: Introducing a novel hybrid silica-based chitosan-graphene oxide biosorbent for the evaluation of pesticides and antibiotics in food matrices

Advances in Sample Preparation
This study introduces a novel silica-graphene oxide@chitosan (SiGO@CS) material as a packed biosorbent for microextraction by packed sorbent (MEPS), followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis of pesticides (atrazine ...
Rafael O. Martins, Fernando M. Lanças
doaj   +1 more source

Women’s Perceptions of Caesarean Birth: A Roy International Study [PDF]

, 2011
The purpose of this Roy adaptation model-based multi-site international mixed method study was to examine the relations of type of caesarean birth (unplanned/planned), number of caesarean births (primary/repeat), and preparation for caesarean birth to ...
Aber, Cynthia, Astedt-Kurki, Paivi, Fawcett, Jacqueline, Hall, Jaye L., Haussler, Susan, King, Charlette, Myers, Sheila Taylor, Newton, Jennifer, Rantanen, Anja, Silva, Virginia, Tarkka, Marja-Terttu, Waters, V. Lynn, Weiss, Marianne   +12 more
core   +2 more sources

A miniaturized QuEChERS-DLLME method for simultaneous determination of acetamide, acrylamide, and glycidamide in infant formula using GC–MS

Advances in Sample Preparation
Infant formula is the only food product suitable for infants during the first months of life. Therefore, evaluating food contaminants is essential for ensuring infant food safety.
J.A. Custodio-Mendoza, M.P. España Fariñas, A.M. Ares-Fuentes, M.A. Kurek, A.M. Carro Díaz   +4 more
doaj   +1 more source

One step derivatization and switchable hydrophilicity solvent-based microextraction for the determination of adamantane analogues in human urine by HPLC-FLD

Advances in Sample Preparation
The present study describes an “one-step” derivatization and microextraction using a pH-switchable hydrophilicity solvent for the determination of amantadine and memantine in human urine by liquid chromatography and fluorescence detection.
Marianna Ntorkou, Paraskevas D. Tzanavaras, Constantinos K. Zacharis   +2 more
doaj   +1 more source

Pure xenon hexafluoride prepared for thermal properties studies [PDF]

, 1967
Preparation of a xenon hexafluoride and sodium fluoride salt yields a sample of the highest possible purity for use in thermal measurements. The desired hexafluoride can easily be freed from the common contaminants, xenon tetra-fluoride, xenon difluoride,
Malm, J. G., Osborne, D. W., Schreiner, F.   +2 more
core   +1 more source

Local deformations and incommensurability of high quality epitaxial graphene on a weakly interacting transition metal [PDF]

, 2012
We investigate the fine structure of graphene on iridium, which is a model for graphene weakly interacting with a transition metal substrate. Even the highest quality epitaxial graphene displays tiny imperfections, i.e. small biaxial strains, ca.
Blanc, Nils, Coraux, Johann, Geaymond, Olivier, N'Diaye, Alpha T., Renaud, Gilles, Vo-Van, Chi   +5 more
core   +3 more sources