J 2006

Electrochemical sensors for detection of acetylsalicylic acid

ŠUPALKOVÁ, V., J. PETŘEK, L. HAVEL, Soňa KŘÍŽKOVÁ, J. PETROLVÁ et. al.

Basic information

Original name

Electrochemical sensors for detection of acetylsalicylic acid

Name in Czech

Elektrochemický senzor pro detekci acetylsalicylové kyseliny

Authors

ŠUPALKOVÁ, V. (203 Czech Republic), J. PETŘEK (203 Czech Republic), L. HAVEL (203 Czech Republic), Soňa KŘÍŽKOVÁ (203 Czech Republic), J. PETROLVÁ (203 Czech Republic), Vojtěch ADAM (203 Czech Republic), David POTĚŠIL (203 Czech Republic), P. BABULA (203 Czech Republic), Miroslava BEKLOVÁ (203 Czech Republic), Aleš HORNA (203 Czech Republic) and René KIZEK (203 Czech Republic, guarantor)

Edition

SENSORS, 2006, 1424-8220

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10405 Electrochemistry

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 1.373

RIV identification code

RIV/00216224:14310/06:00016396

Organization unit

Faculty of Science

UT WoS

000244633800004

Keywords in English

Electrochemistry; sensors; acetylsalicylic acid
Změněno: 14/2/2007 17:21, Ing. Radka Mikelová, Ph.D.

Abstract

V originále

Acetylsalicylic acid (AcSA), or aspirin, was introduced in the late 1890s and has been used to treat a variety of inflammatory conditions. The aim of this work was to suggest electrochemical sensor for acetylsalicylic detection. Primarily, we utilized square wave voltammetry (SWV) using both carbon paste electrode (CPE) and of graphite pencil electrode (GPE) as working ones to indirect determination of AcSA. The principle of indirect determination of AcSA bases in its hydrolysis on salicylic acid (SA), which is consequently detected. Thus, we optimized both determination of SA and conditions for AcSA hydrolysis and found out that the most suitable frequency, amplitude, step potential and the composition and pH of the supporting electrolyte for the determination of SA was 260 Hz, 50 mV, 10 mV and Britton-Robinson buffer (pH 1.81), respectively. The detection limit (S/N = 3) of the SA was 1.3 ng/ml. After that, we aimed on indirect determination of AcSA by SWV CPE. We tested the influence of pH of Britton-Robinson buffer and temperature on yield of hydrolysis, and found out that 100% hydrolysis of AcSA was reached after 80 minutes at pH 1.81 and 90C. The method for indirect determination of AcSA has been utilized to analyse pharmaceutical drug. The determined amount of AcSA in the pharmaceutical drug was in good agreement with the declared amounts. Moreover, we used GPE for determination of AcSA in a pharmaceutical drug. Base of the results obtained from stationary electrochemical instrument we used flow injection analysis with electrochemical detection to determine of salicylates (SA, AcSA, thiosalicylic acid, 3,5-dinitrosalicylic acid and 5-sulfosalicylic acid – SuSA). We found out that we are able to determine all of detected salicylates directly without any pre-treatment, hydrolysis and so on at units of femtomoles per injection (5 ul).

In Czech

Elektrochemický senzor pro detekci acetylsalicylové kyseliny

Links

GP525/04/P132, research and development project
Name: Studium obranných mechanismů rostlin při stresu způsobeném těžkými kovy