Capillary gap flow cell as capillary-end electrochemical detector in flow-based analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F19%3A43915460" target="_blank" >RIV/62156489:43210/19:43915460 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/19:PU131844

Výsledek na webu

<a href="https://doi.org/10.1016/j.electacta.2019.02.026" target="_blank" >https://doi.org/10.1016/j.electacta.2019.02.026</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2019.02.026" target="_blank" >10.1016/j.electacta.2019.02.026</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Capillary gap flow cell as capillary-end electrochemical detector in flow-based analysis

Popis výsledku v původním jazyce

A gap flow cell (gap-FC) as a capillary-end electrochemical (EC) detector, incorporating exchangeable screen-printed electrodes, that facilitates adjustment of the gap distance between the capillary outlet and working electrode down to 30 um was investigated. The analytical performance of the gap-FC was assessed in terms of detector response (current), the efficiency of EC conversion of ferrocyanide, and effective cell volume, as a function of flow rate and gap distance, within a range of 0.1-200 mu L min(-1) and 30-100 mu m, respectively. As a result, an efficiency of EC conversion within the range of similar to 1.5-11% (similar to 3-16 times higher than wall-jet FC), at an effective cell volume of similar to 30-75 nL, was achieved. The gap-FC was applied as a liquid chromatography EC detector, coupled with standard and capillary format liquid chromatographs, where the analytical performance of gap-FC was compared with that of a UV detector. With the standard LC, the sensitivity for ascorbic acid, 2,3-dihydroxybenzoic acid and pyrocatechol, was greater than with the UV detector, with limits of detection (LODs) one order of magnitude lower for the gap-FC (0.10 mu M, 0.09 mu M, 0.19 mu M, respectively, RSD 1.35-3.8%, n = 9, linearity r(2) similar to 0.99 for concentration range 1-100 mu M). LODs of test electroactive solutes using the gap-FC were similar to 2 times lower than LODs reported in existing literature using standard EC detectors, including wall-jet and thin-layer FCs.

Název v anglickém jazyce

Capillary gap flow cell as capillary-end electrochemical detector in flow-based analysis

Popis výsledku anglicky

A gap flow cell (gap-FC) as a capillary-end electrochemical (EC) detector, incorporating exchangeable screen-printed electrodes, that facilitates adjustment of the gap distance between the capillary outlet and working electrode down to 30 um was investigated. The analytical performance of the gap-FC was assessed in terms of detector response (current), the efficiency of EC conversion of ferrocyanide, and effective cell volume, as a function of flow rate and gap distance, within a range of 0.1-200 mu L min(-1) and 30-100 mu m, respectively. As a result, an efficiency of EC conversion within the range of similar to 1.5-11% (similar to 3-16 times higher than wall-jet FC), at an effective cell volume of similar to 30-75 nL, was achieved. The gap-FC was applied as a liquid chromatography EC detector, coupled with standard and capillary format liquid chromatographs, where the analytical performance of gap-FC was compared with that of a UV detector. With the standard LC, the sensitivity for ascorbic acid, 2,3-dihydroxybenzoic acid and pyrocatechol, was greater than with the UV detector, with limits of detection (LODs) one order of magnitude lower for the gap-FC (0.10 mu M, 0.09 mu M, 0.19 mu M, respectively, RSD 1.35-3.8%, n = 9, linearity r(2) similar to 0.99 for concentration range 1-100 mu M). LODs of test electroactive solutes using the gap-FC were similar to 2 times lower than LODs reported in existing literature using standard EC detectors, including wall-jet and thin-layer FCs.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Electrochimica Acta

ISSN

0013-4686

e-ISSN

—

Svazek periodika

303

Číslo periodika v rámci svazku

20 April

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

85-93

Kód UT WoS článku

000461014900010

EID výsledku v databázi Scopus

2-s2.0-85062274449