molecules-logo

Journal Browser

Journal Browser

Special Issue "Nanoparticles in Sample Preparation and Analysis"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Analytical Chemistry".

Deadline for manuscript submissions: 31 August 2020.

Special Issue Editors

Prof. Dr. Alireza Ghiasvand
Website SciProfiles
Guest Editor
Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
Interests: instrumentation; synthesis, characterization and application of nanomaterials; solid- and liquid-phase microextraction; microfluidic; chromatography and capillary electrophoresis
Dr. Joselito P. Quirino
Website
Guest Editor
Australian Centre of Research on Separation Science, School of Physical Science, University of Tasmania, Hobart, Tasmania, Australia
Interests: capillary electrophoresis; liquid chromatography; mass spectrometry; sample concentration; green sample preparation
Special Issues and Collections in MDPI journals
Prof. Dr. Yunlei Xianyu
Website
Guest Editor
College of Biosystems Engineering and Food Science, Zhejiang University, China
Interests: biosensors; microfluidics; nanoparticles; analytical chemistry; food analysis

Special Issue Information

Dear Colleagues,

Nanoparticles have found an array of innovative uses in analytical chemistry. These include research in the areas of sample preparation, separations, detection, and sensors/device development. This Special Issue aims to provide a collection of research and review papers that demonstrates the increasing and important role of nanoparticles, towards improving analytical methodologies that are important to man. New concepts that relate to the use of nanoparticles in qualitative and quantitative analytical chemistry are encouraged. Papers dealing with the analysis of complex mixtures and important compounds (e.g., biologically active, environmentally unsafe, natural products, and compounds with commercial interest) are most welcome.

Prof. Alireza Ghiasvand
Assoc. Prof. Joselito P. Quirino
Prof. Dr. Yunlei Xianyu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanoparticles
  • magnetic
  • carbon
  • extraction
  • purification
  • chromatography
  • electrophoresis
  • colorimetry
  • luminescence
  • sensors
  • devices
  • diagnostics

Published Papers (4 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Open AccessArticle
Magnetic Solid-Phase Extraction Based on Poly 4-Vinyl Pyridine for HPLC-FLD Analysis of Naproxen in Urine Samples
Molecules 2020, 25(12), 2924; https://doi.org/10.3390/molecules25122924 - 25 Jun 2020
Abstract
A magnetic solid phase extraction technique followed by liquid chromatography with a fluorescence detector for naproxen analysis in human urine samples was developed. The method includes the extraction of naproxen with a magnetic solid synthetized with magnetite and poly 4-vinylpriridine, followed by the [...] Read more.
A magnetic solid phase extraction technique followed by liquid chromatography with a fluorescence detector for naproxen analysis in human urine samples was developed. The method includes the extraction of naproxen with a magnetic solid synthetized with magnetite and poly 4-vinylpriridine, followed by the magnetic separation of the solid phase and desorption of the analyte with methanol. Under optimal conditions, the linear range of the calibration curve was 0.05–0.60 μg L−1, with a limit of detection of 0.02 μg L−1. In all cases values of repeatability were lower than 5.0% with recoveries of 99.4 ± 1.3%. Precision and accuracy values are adequate for naproxen (Npx) analysis in urine samples. Full article
(This article belongs to the Special Issue Nanoparticles in Sample Preparation and Analysis)
Show Figures

Graphical abstract

Open AccessFeature PaperArticle
Chromium-Based Polypyrrole/MIL-101 Nanocomposite as an Effective Sorbent for Headspace Microextraction of Methyl tert-Butyl Ether in Soil Samples
Molecules 2020, 25(3), 644; https://doi.org/10.3390/molecules25030644 - 03 Feb 2020
Cited by 1
Abstract
The performance of headspace solid-phase microextraction (HS-SPME) was upgraded by easy and low-cost preparation of a new nanocomposite fiber. A polypyrrole/chromium-based metal–organic framework, [email protected](Cr), nanocomposite was electrochemically synthesized and simultaneously coated on a steel wire as a microextraction sorbent. The morphology and chemical [...] Read more.
The performance of headspace solid-phase microextraction (HS-SPME) was upgraded by easy and low-cost preparation of a new nanocomposite fiber. A polypyrrole/chromium-based metal–organic framework, [email protected](Cr), nanocomposite was electrochemically synthesized and simultaneously coated on a steel wire as a microextraction sorbent. The morphology and chemical structure of the prepared nanocomposite was characterized by Fourier-transform infrared spectrometry (FT-IR), scanning electron microscopy (SEM), and energy dispersive X-ray analysis (EDX) techniques. The microsorbent was used for sampling of methyl-tert-butyl ether (MTBE) in solid samples, through an HS-SPME sampling strategy, followed by GC-FID measurement. The optimal experimental conditions, including extraction temperature, extraction time, and GC desorption conditions, were evaluated and optimized. The proposed procedure showed good sensitivity (limit of detection was 0.01 ng·g−1) and precision (relative standard deviation was 8.4% for six replicated analyses). The calibration curve was linear over the range of 5–40,000 ng·g−1, with a correlation coefficient of 0.994. The limit of quantification was 0.4 ng·g−1. The fabricated fiber exhibited good repeatability and reproducibility for the sampling of MTBE, with average recovery values of 88–114%. The intra-fiber and inter-fiber precisions were found to be 8.4% and 19%, respectively. The results demonstrated the superiority of the [email protected](Cr)-coated fiber in comparison with handmade (polypyrrole, PPY) and commercial fibers (polyacrylate, PA; polydimethylsiloxane, PDMS; and divinylbenzene/carboxen/polydimethylsiloxane, DVB/CAR/PDMS) for the analysis of solid samples. The developed method was successfully employed for the analysis of MTBE in different soil samples contaminated by oil products. Full article
(This article belongs to the Special Issue Nanoparticles in Sample Preparation and Analysis)
Show Figures

Graphical abstract

Open AccessArticle
Alginate-Mediated Synthesis of Hetero-Shaped Silver Nanoparticles and Their Hydrogen Peroxide Sensing Ability
Molecules 2020, 25(3), 435; https://doi.org/10.3390/molecules25030435 - 21 Jan 2020
Cited by 1
Abstract
A new method for the simple synthesis of stable heterostructured biopolymer (sodium alginate)-capped silver nanoparticles (Ag-NPs) based on green chemistry is reported. The as-prepared nanoparticles were characterized using the ultraviolet-visible (UV-Vis) absorption spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared [...] Read more.
A new method for the simple synthesis of stable heterostructured biopolymer (sodium alginate)-capped silver nanoparticles (Ag-NPs) based on green chemistry is reported. The as-prepared nanoparticles were characterized using the ultraviolet-visible (UV-Vis) absorption spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and dynamic light scattering (DLS) techniques. The results showed that the as-prepared Ag-NPs have a heterostructured morphology with particle size in the range 30 ± 18–60 ± 25 nm, showing a zeta potential of −62 mV. The silver nanoparticle formation was confirmed from UV-Vis spectra showing 424 nm as maximum absorption. The particle size and crystallinity of the as-synthesized nanoparticles were analyzed using TEM and XRD measurements, respectively. FTIR spectra confirmed the presence of alginate as capping agent to stabilize the nanoparticles. The Ag-NPs also showed excellent sensing capability, with a linear response to hydrogen peroxide spanning a wide range of concentrations from 10−1 to 10−7 M, which indicates their high potential for water treatment applications, such as pollution detection and nanofiltration composites. Full article
(This article belongs to the Special Issue Nanoparticles in Sample Preparation and Analysis)
Show Figures

Figure 1

Open AccessArticle
Preparation of Magnetic CuFe2O4@[email protected] Nanocomposites with Highly Catalytic Activity Based on Cellulose Nanocrystals
Molecules 2020, 25(1), 124; https://doi.org/10.3390/molecules25010124 - 28 Dec 2019
Abstract
A facile approach was successfully developed for synthesis of cellulose nanocrystals (CNC)-supported magnetic CuFe2O4@[email protected] nanospheres which consist of a paramagnetic CuFe2O4@Ag core and porous ZIF-8 shell. The CuFe2O4 nanoparticles (NPs) were first [...] Read more.
A facile approach was successfully developed for synthesis of cellulose nanocrystals (CNC)-supported magnetic CuFe2O4@[email protected] nanospheres which consist of a paramagnetic CuFe2O4@Ag core and porous ZIF-8 shell. The CuFe2O4 nanoparticles (NPs) were first prepared in the presence of CNC and dispersant. Ag NPs were then deposited on the CuFe2O4/CNC composites via an in situ reduction directed by dopamine polymerization (PDA). The CuFe2O4/[email protected]@ZIF-8 nanocomposite was characterized by TEM, FTIR, XRD, N2 adsorption-desorption isotherms, VSM, and XPS. Catalytic studies showed that the CuFe2O4/[email protected]@ZIF-8 catalyst had much higher catalytic activity than CuFe2O4@Ag catalyst with the rate constant of 0.64 min−1. Because of the integration of ZIF-8 with CuFe2O4/[email protected] that combines the advantaged of each component, the nanocomposites were demonstrated to have an enhanced catalytic activity in heterogeneous catalysis. Therefore, these results demonstrate a new method for the fabrication of CNC-supported magnetic core-shell catalysts, which display great potential for application in biocatalysis and environmental chemistry. Full article
(This article belongs to the Special Issue Nanoparticles in Sample Preparation and Analysis)
Show Figures

Graphical abstract

Back to TopTop