TY  - JOUR
AU  - Sposito, H.G.M.
AU  - Lobato, A.
AU  - Tasić, Nikola
AU  - Maldaner, A.O.
AU  - Paixão, T.R.L.C.
AU  - Gonçalves, L.M.
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1526
AB  - Diltiazem is a calcium channel-blocking agent, efficient in treating various heart-related conditions and diseases. It has been used as a cutting agent in cocaine and prevents its common cardiotoxic effects. This paper presents a highly selective molecularly-imprinted sensor to detect diltiazem in buffer and urine. In addition, the possibility of using this sensor as a forensic tool for fingerprinting street-seized cocaine samples of heterogeneous composition was investigated. With thorough optimization of the fabrication process, it was possible to obtain a sensible and reproducible analytical signal via square-wave voltammetry (SWV) as the electroanalytical technique. The obtained analytical parameters for the samples in buffer, pH 7.4, were the limit of detection (LOD) of 0.12 µmol L−1, the limit of quantification (LOQ) of 0.41 µmol L−1, and inter-day reproducibility of 2%. For the samples in artificial urine, the analytical parameters were LOD of 0.26 µmol L−1, LOQ of 0.88 µmol L−1, and inter-day reproducibility of 9%. Decent linearity of the analytical signal with the increased concentration of diltiazem in the cocaine street samples suggested a high perspective of the proposed sensor for the forensic laboratory applications, more precisely, the determination of the seized samples' origins.
PB  - Elsevier B.V.
T2  - Journal of Electroanalytical Chemistry
T1  - Swift electrochemical sensing of diltiazem employing highly-selective molecularly-imprinted 3-amino-4-hydroxybenzoic acid
VL  - 911
DO  - 10.1016/j.jelechem.2022.116207
ER  - 

@article{
author = "Sposito, H.G.M. and Lobato, A. and Tasić, Nikola and Maldaner, A.O. and Paixão, T.R.L.C. and Gonçalves, L.M.",
year = "2022",
abstract = "Diltiazem is a calcium channel-blocking agent, efficient in treating various heart-related conditions and diseases. It has been used as a cutting agent in cocaine and prevents its common cardiotoxic effects. This paper presents a highly selective molecularly-imprinted sensor to detect diltiazem in buffer and urine. In addition, the possibility of using this sensor as a forensic tool for fingerprinting street-seized cocaine samples of heterogeneous composition was investigated. With thorough optimization of the fabrication process, it was possible to obtain a sensible and reproducible analytical signal via square-wave voltammetry (SWV) as the electroanalytical technique. The obtained analytical parameters for the samples in buffer, pH 7.4, were the limit of detection (LOD) of 0.12 µmol L−1, the limit of quantification (LOQ) of 0.41 µmol L−1, and inter-day reproducibility of 2%. For the samples in artificial urine, the analytical parameters were LOD of 0.26 µmol L−1, LOQ of 0.88 µmol L−1, and inter-day reproducibility of 9%. Decent linearity of the analytical signal with the increased concentration of diltiazem in the cocaine street samples suggested a high perspective of the proposed sensor for the forensic laboratory applications, more precisely, the determination of the seized samples' origins.",
publisher = "Elsevier B.V.",
journal = "Journal of Electroanalytical Chemistry",
title = "Swift electrochemical sensing of diltiazem employing highly-selective molecularly-imprinted 3-amino-4-hydroxybenzoic acid",
volume = "911",
doi = "10.1016/j.jelechem.2022.116207"
}

Sposito, H.G.M., Lobato, A., Tasić, N., Maldaner, A.O., Paixão, T.R.L.C.,& Gonçalves, L.M.. (2022). Swift electrochemical sensing of diltiazem employing highly-selective molecularly-imprinted 3-amino-4-hydroxybenzoic acid. in Journal of Electroanalytical Chemistry
Elsevier B.V.., 911.
https://doi.org/10.1016/j.jelechem.2022.116207

Sposito H, Lobato A, Tasić N, Maldaner A, Paixão T, Gonçalves L. Swift electrochemical sensing of diltiazem employing highly-selective molecularly-imprinted 3-amino-4-hydroxybenzoic acid. in Journal of Electroanalytical Chemistry. 2022;911.
doi:10.1016/j.jelechem.2022.116207 .

Sposito, H.G.M., Lobato, A., Tasić, Nikola, Maldaner, A.O., Paixão, T.R.L.C., Gonçalves, L.M., "Swift electrochemical sensing of diltiazem employing highly-selective molecularly-imprinted 3-amino-4-hydroxybenzoic acid" in Journal of Electroanalytical Chemistry, 911 (2022),
https://doi.org/10.1016/j.jelechem.2022.116207 . .