Results 31 to 40 of about 15,581,970 (330)

Application of solid-phase microextraction in atomic spectrometry

Advances in Sample Preparation, 2022
With the growing requirements for the monitoring of heavy metals at an ultra-trace level in the environment and the real-time detection of toxic elements and their compounds for environmental pollution accidents, researchers devoted significant efforts ...
Yubin Su, Tian Ren, Yao Lin, Chengbin Zheng   +3 more
doaj   +1 more source

Metabolomics in the Context of Plant Natural Products Research: From Sample Preparation to Metabolite Analysis

Metabolites, 2020
Plant-derived natural products have long been considered a valuable source of lead compounds for drug development. Natural extracts are usually composed of hundreds to thousands of metabolites, whereby the bioactivity of natural extracts can be ...
M. Salem, Leonardo Perez de Souza, Ahmed Serag, A. Fernie, M. Farag, S. Ezzat, S. Alseekh   +6 more
semanticscholar   +1 more source

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 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

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

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

Sample Preparation Techniques for the Analysis of Microplastics in Soil—A Review

Sustainability, 2020
Although most plastic pollution originates on land, current research largely remains focused on aquatic ecosystems. Studies pioneering terrestrial microplastic research have adapted analytical methods from aquatic research without acknowledging the ...
Daniel Thomas, Berit Schütze, W. M. Heinze, Zacharias Steinmetz   +3 more
semanticscholar   +1 more source

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

Polarization fields in GaN/AlN nanowire heterostructures studied by Off axis holography [PDF]

, 2013
In this work, we present an off-axis holography study of GaN/AlN heterostructured nanowires grown by plasma-assisted molecular-beam epitaxy. We discuss the sample preparation of nanowire samples for electron holography and combine potential profiles ...
Hertog, Martien Den, Monroy, Eva, Songmuang, Rudeesun   +2 more
core   +4 more sources