scholarly journals Miniaturized sample preparation based on carbon nanostructures

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Soledad Cárdenas
Keyword(s):  
Analytical Chemistry ◽  
Carbon Nanoparticles ◽  
Carbon Nanostructures ◽  
Solid Phase ◽  
Present Situation ◽  
Review Article ◽  
Sample Treatment ◽  
Phase Extraction ◽  
Analytical Chemist ◽  
Potential Influence

AbstractThe evolution of analytical methodologies has been driven by the objective to reduce the complexity of sample treatment while increasing the efficiency of the overall analytical process. For this reason, the analytical chemist takes into consideration advances in other scientific areas and systematically evaluates the potential influence that such discoveries might have on its own discipline. This is the present situation with nanostructured materials, which have already been recognized as a revolution in many scientific and technological fields, including analytical chemistry. Carbon nanoparticles have been a cornerstone in the advance of miniaturization of analytical processes. This review article considers the contribution of four reference carbon nanoparticles: nanotubes, graphene, nanohorns/ cones and fullerenes, in the context of miniaturized sample treatment, where their outstanding sorbent properties are by far the most exploited in (micro) solid phase extraction.

scholarly journals Special Articles: Environmental Sciences and Analytical Chemistry. Solid phase extraction of organotin compounds in seawater.

1994 ◽  
Vol 43 (11) ◽  
pp. 933-938 ◽  
Author(s):  
Muneyuki KOHRI ◽  
Yoshinori INOUE ◽  
Kunikazu IDE ◽  
Koichi SATO ◽  
Haruno OKOCHI
Keyword(s):  
Analytical Chemistry ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Organotin Compounds ◽  
Phase Extraction ◽  
Environmental Sciences

scholarly journals Bioanalytical HPLC Applications of In-Tube Solid Phase Microextraction: A Two-Decade Overview

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2096 ◽  
Author(s):  
Natalia Manousi ◽  
Paraskevas D. Tzanavaras ◽  
Constantinos K. Zacharis
Keyword(s):  
Solid Phase Microextraction ◽  
Considerable Increase ◽  
Solid Phase ◽  
Time Frame ◽  
Review Article ◽  
Treatment Technique ◽  
Sample Treatment ◽  
Research Groups ◽  
The Past ◽  
Bioanalytical Applications

In-tube solid phase microextraction is a cutting-edge sample treatment technique offering significant advantages in terms of miniaturization, green character, automation, and preconcentration prior to analysis. During the past years, there has been a considerable increase in the reported publications, as well as in the research groups focusing their activities on this technique. In the present review article, HPLC bioanalytical applications of in-tube SPME are discussed, covering a wide time frame of twenty years of research reports. Instrumental aspects towards the coupling of in-tube SPME and HPLC are also discussed, and detailed information on materials/coatings and applications in biological samples are provided.

scholarly journals Dispersive Solid-Phase Extraction using Magnetic Carbon Nanotube Composite for the Determination of Emergent Mycotoxins in Urine Samples

Toxins ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 51 ◽  
Author(s):  
Arroyo-Manzanares ◽  
Peñalver-Soler ◽  
Campillo ◽  
Viñas
Keyword(s):  
Carbon Nanotube ◽  
Solid Phase Extraction ◽  
High Resolution Mass Spectrometry ◽  
Solid Phase ◽  
Urine Samples ◽  
Sample Treatment ◽  
Phase Extraction ◽  
X Ray ◽  
Relative Standard

Dispersive magnetic solid-phase extraction (DMSPE) has received growing attention for sample treatment preconcentration prior to the separation of analytes due to its many advantages. In the present work, the potential of DMSPE for the determination of emergent mycotoxins (enniatins A, A1, B and B1, and beauvericin) is investigated for the first time. Different magnetic nanoparticles were tested and a magnetic multiwalled carbon nanotube (Fe3O4@MWCNT) composite was selected for the extraction and preconcentration of the five target mycotoxins in human urine samples before their analysis by ultrahigh performance liquid chromatography coupled to high resolution mass spectrometry (UHPLC-HRMS). The nanocomposite was characterized by energy dispersive X-ray spectrometry, scanning electron microscopy, Fourier transform infrared spectrophotometry, and X-ray diffraction. Several parameters affecting the adsorption and desorption of DMSPE steps were optimized and the method was fully validated. Due to a matrix effect, matrix-matched calibration curves were necessary to carry out quantification. In this way, limits of quantification of between 0.04 and 0.1 μg/L, relative standard deviation values lower than 12% and recoveries between 89.3% and 98.9% were obtained. Finally, a study of the reuse of the Fe3O4@MWCNT composite was carried out, confirming that it can be reused at least four times.

scholarly journals Elemental Speciation Analysis in Environmental Studies: Latest Trends and Ecological Impact

2021 ◽  
Vol 18 (22) ◽  
pp. 12135
Author(s):  
Mauricio Llaver ◽  
Emiliano F. Fiorentini ◽  
María N. Oviedo ◽  
Pamela Y. Quintas ◽  
Rodolfo G. Wuilloud
Keyword(s):  
Analytical Chemistry ◽  
Solid Phase ◽  
Ecological Impact ◽  
Chemical Species ◽  
Speciation Analysis ◽  
Sample Treatment ◽  
Chromatographic Separations ◽  
Separate Species ◽  
Relevant Element

Speciation analysis is a key aspect of modern analytical chemistry, as the toxicity, environmental mobility, and bioavailability of elemental analytes are known to depend strongly on an element’s chemical species. Henceforth, great efforts have been made in recent years to develop methods that allow not only the determination of elements as a whole, but also each of its separate species. Environmental analytical chemistry has not ignored this trend, and this review aims to summarize the latest methods and techniques developed with this purpose. From the perspective of each relevant element and highlighting the importance of their speciation analysis, different sample treatment methods are introduced and described, with the spotlight on the use of modern nanomaterials and novel solvents in solid phase and liquid-liquid microextractions. In addition, an in-depth discussion of instrumental techniques aimed both at the separation and quantification of metal and metalloid species is presented, ranging from chromatographic separations to electro-chemical speciation analysis. Special emphasis is made throughout this work on the greenness of these developments, considering their alignment with the precepts of the Green Chemistry concept and critically reviewing their environmental impact.

Sign in / Sign up

Export Citation Format

Share Document