Results 21 to 30 of about 4,446,653 (191)

An effective palynological preparation procedure using hydrogen peroxide [PDF]

, 2007
Most pre-Quaternary palynology samples are currently prepared by demineralization of the sediment/sedimentary rock matrix using hydrochloric and hydrofluoric acids (HCl and HF respectively).
Kyffin-Hughes, Jane E., Owens, Bernard, Riding, James   +2 more
core   +2 more sources

An efficient configuration for simultaneous electromembrane extraction of acidic and basic drugs on a chip

Advances in Sample Preparation, 2022
In the present study, a new chip was designed for simultaneous electromembrane extraction (EME) of acidic and basic analytes. The method followed by the HPLC-UV analysis, was used for simultaneous extraction and determination of trace amounts of target ...
Zohre Hashemlou, Yadollah Yamini, Monireh Karami   +2 more
doaj   +1 more source

A comprehensive review on the use of microextraction techniques in the analysis of cosmetic products

Advances in Sample Preparation, 2022
Microextraction techniques have gained special relevance since their appearance in the 90s, and the analysis of cosmetic products has not been immune to this trend.
Lorenza Schettino, Guillem Peris-Pastor, Juan L. Benedé, Alberto Chisvert   +3 more
doaj   +1 more source

A Tutorial on AGREEprep an Analytical Greenness Metric for Sample Preparation

Advances in Sample Preparation, 2022
Sample preparation is a key step in the analytical procedure and a critical component for achieving analytical greenness. AGREEprep is the first metric intended for evaluating the environmental impact of sample preparation methods.
Francisco Pena-Pereira, Marek Tobiszewski, Wojciech Wojnowski, Elefteria Psillakis   +3 more
doaj   +1 more source

Uncertainties of size measurements in electron microscopy characterization of nanomaterials in foods [PDF]

, 2015
Electron microscopy is a recognized standard tool for nanomaterial characterization, and recommended by the European Food Safety Authority for the size measurement of nanomaterials in food.
Boxall, A. B. A., Chaudhry, Q., Dudkiewicz, A., Hofmann, P., Linsinger, T. P. J., Molhave, K., Tiede, K.   +6 more
core   +1 more source

Pipette tip-electrospray mass spectrometry for determining opioids in urine, from on-site micro-handling to high-throughput centrifugal microextraction

Advances in Sample Preparation
Pipette tip-electrospray is a useful technique that synergically combines sample preparation and ambient ionization mass spectrometry for the rapid analysis of samples.
Jaime Millán-Santiago, Rafael Lucena, Soledad Cárdenas   +2 more
doaj   +1 more source

A review of sample preparation and its influence on pH determination in concrete samples [PDF]

, 2017
If we are to monitor the chemical processes in cementitious materials, then pH assays in the pore solutions of cement pastes, mortars, and concretes are of key importance.
Aguado de Cea, Antonio, Manso Blanco, Sandra   +1 more
core   +2 more sources

Chicken egg white coated paper, a sustainable mixed-mode cationic exchange biocomposite to extract antidepressants from saliva samples prior to their determination by direct infusion mass spectrometry

Advances in Sample Preparation
Proteinaceous materials are useful precursors for preparing sustainable and cost-effective sorptive phases. Among them, chicken egg white is an excellent alternative, serving as a source of ovalbumin that can be used as a biosorbent. In this article, the
Ana M. Pedraza-Soto, Rafael Lucena, Soledad Cárdenas   +2 more
doaj   +1 more source

Impact of sample preservation and manipulation on insect gut microbiome profiling : a test case with fruit flies (Diptera, Tephritidae) [PDF]

, 2019
High-throughput sequencing (HTS) techniques are of great value for the investigation of microbial communities, and have been extensively used to study the gut microbiome.
Augustinos, Antonios, Bourtzis, Kostas, De Cock, Maarten, De Meyer, Marc, Vandamme, Peter, Virgilio, Massimiliano, Willems, Anne   +6 more
core   +1 more source

On-site stir-blade microextraction combined with dual-polarity direct infusion mass spectrometry for analysis of atrazine, daidzein, and genistein in environmental water samples

Green Analytical Chemistry
Integration has emerged as the latter driving force in the evolution of sample preparation, greening analytical measurements through the minimization of steps and their inherent required resources.
Carlos Calero-Cañuelo, Francisco Antonio Casado-Carmona, Rafael Lucena, Soledad Cárdenas   +3 more
doaj   +1 more source