1. Αποθετήριο Παραδοτέων Υποτρόφων Δράσεων ΕΣΠΑ Τριτοβάθμιας Εκπαίδευσης 2017-2023
2. Όλο το Αποθετήριο
3. Ερευνητικές ομάδες

Τύπος:	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Application of dissolvable Mg/Al layered double hydroxides as an adsorbent for the dispersive solid phase extraction of gold nanoparticles prior to their determination by atomic absorption spectrometry
Συγγραφέας:	[EL] Χολέβα, Τατιάνα[EN] Choleva, Tatiana [EL] Γκιώκας, Δημοσθένης[EN] Giokas, Dimosthenis
Ημερομηνία:	26/11/2019
Περίληψη:	In this work, dissolvable layered double hydroxides (LDH) were used for the first time for the extraction and preconcentration of metallic nanoparticles from water samples. Magnesium–aluminum LDHs were prepared in situ in a sample solution by alkaline co-precipitation and separated by centrifugation. It was found that gold nanoparticles (AuNPs) and gold ions could be simultaneously extracted by the LDH by electrostatic interactions and anion exchange reactions, respectively. Separation of AuNPs from gold ions could be achieved by ultracentrifugation enabling the selective determination of AuNPs in the sample. Two analytical techniques based on molecular and atomic spectrometry (spectrophotometry and electrothermal atomic absorption spectrometry) were used to optimize the method and determine the concentration of AuNPs in spiked environmental water samples at femtomolar concentration levels, respectively. Under the optimized experimental conditions the method enables the determination and speciation of AuNPs at concentration levels as low as 16 femtomole L 1 with satisfactory recoveries (71– 91%) and good reproducibility (<9%).
Γλώσσα:	Αγγλικά
Σελίδες:	8
DOI:	10.1039/c9ay02321f
EISSN:	1759-9679
Θεματική κατηγορία:	[EL] Αναλυτική χημεία[EN] Analytical Chemistry
Κάτοχος πνευματικών δικαιωμάτων:	© The Author(s) 2020
Όροι και προϋποθέσεις δικαιωμάτων:	This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes. To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.
Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη:	https://pubs.rsc.org/en/content/articlelanding/2020/ay/c9ay02321f
Ηλεκτρονική διεύθυνση περιοδικού:	https://pubs.rsc.org/en/journals/journalissues/ay#!recentarticles&adv
Τίτλος πηγής δημοσίευσης:	Analytical Methods
Τεύχος:	3
Τόμος:	12
Σελίδες τεκμηρίου (στην πηγή):	368–375
Σημειώσεις:	This research has been financially supported by the General Secretariat for Research and Technology (GSRT) and the Hellenic Foundation for Research and Innovation (HFRI) (Scholarship Code: 763).
Εμφανίζεται στις συλλογές:	Ερευνητικές ομάδες