Electrochemical sensor based on phospholipid modified glassy carbon electrode - determination of paraquat

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73591370" target="_blank" >RIV/61989592:15310/18:73591370 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388955:_____/18:00490129

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1572665717309232" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1572665717309232</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jelechem.2017.12.048" target="_blank" >10.1016/j.jelechem.2017.12.048</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical sensor based on phospholipid modified glassy carbon electrode - determination of paraquat

Popis výsledku v původním jazyce

Electrochemical sensor based on glassy carbon electrode modified with asolectin (mixture of soybean phospholipids) was developed. Properties of phospholipid layer, such as thickness and compactness, were investigated using atomic force microscopy and X-ray photoelectron spectroscopy. Phospholipids completely cover whole surface and the thickness of the layer 7.1 +/- 1.2 nm corresponds to the value of the phospholipid bilayer of cell membranes. Due to the accumulation of paraquat in the phospholipid layer, square wave voltammetry with asolectin modified electrode exhibits three times higher sensitivity, measured as a slope of calibration dependence, and better linearity in comparison to unmodified glassy carbon electrode. Limit of detection 2.2 nmol L-1 and recoveries higher than 88% were achieved in model samples of water. The method was used for determination of paraquat in real sample of river water and results were compared with high performance liquid chromatography and differential pulse voltammetry on hanging mercury drop electrode giving 0.071 +/- 0.010, 0.050 +/- 0.010 and 0.061 +/- 0.008 mu mol L-1, respectively.

Název v anglickém jazyce

Electrochemical sensor based on phospholipid modified glassy carbon electrode - determination of paraquat

Popis výsledku anglicky

Electrochemical sensor based on glassy carbon electrode modified with asolectin (mixture of soybean phospholipids) was developed. Properties of phospholipid layer, such as thickness and compactness, were investigated using atomic force microscopy and X-ray photoelectron spectroscopy. Phospholipids completely cover whole surface and the thickness of the layer 7.1 +/- 1.2 nm corresponds to the value of the phospholipid bilayer of cell membranes. Due to the accumulation of paraquat in the phospholipid layer, square wave voltammetry with asolectin modified electrode exhibits three times higher sensitivity, measured as a slope of calibration dependence, and better linearity in comparison to unmodified glassy carbon electrode. Limit of detection 2.2 nmol L-1 and recoveries higher than 88% were achieved in model samples of water. The method was used for determination of paraquat in real sample of river water and results were compared with high performance liquid chromatography and differential pulse voltammetry on hanging mercury drop electrode giving 0.071 +/- 0.010, 0.050 +/- 0.010 and 0.061 +/- 0.008 mu mol L-1, respectively.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

ISSN

1572-6657

e-ISSN

—

Svazek periodika

821

Číslo periodika v rámci svazku

JUL

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

7

Strana od-do

33-39

Kód UT WoS článku

000437818600006

EID výsledku v databázi Scopus

2-s2.0-85039704657