• Non ci sono risultati.

Rapid clean-up strategy based on molecularly imprinted polymers for the determination of 3-Indoleacetic acid in plant extracts

N/A
N/A
Protected

Academic year: 2021

Condividi "Rapid clean-up strategy based on molecularly imprinted polymers for the determination of 3-Indoleacetic acid in plant extracts"

Copied!
7
0
0

Testo completo

(1)

Atti del XXV Congresso della Divisione di

Chimica Analitica della Società Chimica Italiana

Trieste, 13 – 17 Settembre 2015

(2)

2

Atti del XXV Congresso della Divisione di

Chimica Analitica della Società Chimica Italiana

Trieste, 13 – 17 Settembre 2015

www.analitica2015.it

ISBN: 978-88-907670-2-9

Editore: Antonella Rossi

Co-editore: Gianpiero Adami

Curatore: Gianpiero Adami

Pubblicato online il 14 Settembre 2015 a Trieste

presso l’Università degli Studi di Trieste

(3)

Comitato Scientifico

Giuseppe Palleschi, Presidente UNIROMA2 Giuseppe Arena UNICT Pier Giuseppe Daniele UNITO Concetta De Stefano UNIME

Carlo Dossi UNINSUBRIA Aldo Laganà UNIROMA1 Claudio Minero UNITO Antonella Rossi UNICA Renato Seeber UNIMORE Luisa Torsi UNIBA Paolo Oliveri UNIGE

Comitato Organizzatore

Gianpiero Adami, Presidente UNITS Edoardo Reisenhofer, Presidente Onorario UNITS Pierluigi Barbieri UNITS Mauro Stener UNITS Paolo Fornasiero UNITS Tiziano Montini UNITS Stefano Covelli UNITS Matteo Crosera UNITS Elena Baracchini UNITS Rosanna Toniolo UNIUD Sabina Susmel UNIUD Carlo Barbante UNIVE Salvatore Daniele UNIVE

Paolo Ugo UNIVE

Gabriele Capodaglio UNIVE Paolo Pastore UNIPD Andrea Tapparo UNIPD

(4)

4

(5)
(6)

6

Presentazione

Il Congresso che la Divisione di Chimica Analitica della Società Chimica Italiana organizza annualmente vuole essere un punto d’incontro e di confronto per tutti coloro che svolgono la propria attività nella ricerca chimico analitica.

Il XXV Congresso si svolge da domenica 13 a giovedì 17 Settembre 2015 a Trieste, presso l’edificio H3 dell’Università degli Studi e si articola in sessioni scientifiche volte a coprire i principali settori della Chimica Analitica.

I principali argomenti di discussione sono i seguenti:

• Alimenti e Nutraceutici • Ambiente e Beni Culturali • Bioanalitica e Omics

• Chemiometria e Qualità del Dato • Chimica Analitica Forense • Elettroanalitica

• Equilibri in Soluzione e Speciazione • Green Chemistry

• Sensori e Biosensori • Spettrometria di Massa • Spettroscopia Analitica • Scienza delle Separazioni • Tossicologia e Salute Umana

L’organizzazione è curata dal gruppo di Chimica Analitica dell’Università degli Studi di Trieste in collaborazione con diversi ricercatori di altre aree scientifiche e con l’importante contributo degli Atenei di Udine, Venezia (Ca’ Foscari) e Padova.

Sede del Congresso

Edificio H3, Università degli Studi di Trieste

TRIESTE, via Valerio, 12/2 (comprensorio P.le Europa)

(7)

P125

RAPID CLEAN-UP STRATEGY BASED ON MOLECULARLY

IMPRINTED POLYMERS FOR THE DETERMINATION OF

3-INDOLEACETIC ACID IN PLANT EXTRACTS

B. Campanella1,2, E. Pulidori2, M. Onor1, S. Tegli3, P. Bogani3, M. Cerboneschi3, E. Passaglia1, A. D’Ulivo1, E. Bramanti1

1

C.N.R., Institute of Chemistry of Organometallic Compounds, UOS of Pisa, Via Moruzzi, 1, 56124 Pisa, Italy

2

University of Pisa, Department of Chemistry and Industrial Chemistry, Via Moruzzi 13, 56124 Pisa, Italy

3

University of Florence, Dipartimento di Scienze delle Produzioni Agroalimentari e dell’Ambiente (DiSPAA), Laboratorio di Patologia Vegetale Molecolare, Via della Lastruccia 10, 50019 Sesto Fiorentino

Indole-3-acetic acid (3-IAA) is a natural auxin that plays a major role in plants growth and its determination is required for understanding plants metabolic pathways. The quantitation of 3-IAA in plant extracts is very challenging due to extreme complexity of the matrix and to the low concentration levels of this analyte. [1]

In this talk a novel clean-up strategy for purification and preconcentration of 3-IAA from plant extracts is presented. The proposed method makes use of molecularly imprinted polymers (MIPs) for the sample preparation stage. A 4-vinylpyridine-based imprinted polymer was prepared using 3-IAA as template and trimethylolpropane trimethacrylate as cross-linker.

MIPs were able to bind selectively the 3-IAA whereas other molecules with a similar structure, such as tryptophan or indoleacetamide, were not retained by the polymers.

Plant tissues were extracted with 80% methanol, and then the MIPs beads were suspended in such extract. The liquid phase was discarded and 3-IAA was recovered from the MIPs with methanol washings and analyzed by HPLC with fluorescence detection. The applicability of the method was demonstrated in terms of linearity, repeatability, recovery, limit of detection and quantitation and evaluation of matrix effect.

The MIP-based approach was compared with the traditional solid-phase extraction. The two approaches were comparable in terms of recovery, but MIPs provided for a superior sample clean-up.

Acknowledgements - This work has been financially supported by the European Project Life+12 ENV/IT/336-AFTER-CU.

[1] “Plant Hormones: Biosynthesis, Signal Transduction, Action!” P. J. Davies (Ed.), Kluwer Academic Publishers, Dordrecht, Boston, London, pp. 1-15 (2004)

Riferimenti

Documenti correlati

Con serratura (solo anta superiore- inferiore in vetro) ⁄ With lock (only upper- lower glass door);.. Per la disponibilità contattare l'ufficio commerciale ⁄ Items not in prompt

The sound intensity level L I is defined as the logarithm of the ratio of the sound intensity at the measuring point to the reference intensity I o. Measurement is performed with

When the unit is in fixed position, before starting machining operations either with fixed tools or with live tools, it is necessary to activate Y-Axis brake, in

- connector connection OD 1,8mm.. - connector connection

6.4 Average best fitness of the best particles in cuPEPSO using different values of the number of parallel stochastic simulations G on the Michaelis- Menten model.. 142 6.5 Heatmaps

When F is an infinite field of characteristic different from 2, we classify the torsion groups with involution G so that the unit group of F G satisfies a ∗-group identity.. The

The most commonly used punctuation marks in scientific texts are the comma and period (called a “full stop” in British English).. After a period, there is a single space, contrary

Since then the number registered has increased but, as there has been also a growth in the number of units designed specifically for teenagers during this time period, it