2019
Lab-on-a-screen-printed electrochemical cell for drop-volume voltammetric screening of flunitrazepam in untreated, undiluted alcoholic and soft drinks
TSELIOU, Fotini, Periklis PAPPAS, Konstantinos SPYROU, Jan HRBÁČ, Mamas PRODROMIDIS et. al.Základní údaje
Originální název
Lab-on-a-screen-printed electrochemical cell for drop-volume voltammetric screening of flunitrazepam in untreated, undiluted alcoholic and soft drinks
Autoři
TSELIOU, Fotini (300 Řecko), Periklis PAPPAS (300 Řecko), Konstantinos SPYROU (300 Řecko), Jan HRBÁČ (203 Česká republika, garant, domácí) a Mamas PRODROMIDIS (300 Řecko)
Vydání
Biosensors and Bioelectronics, Oxford, Elsevier, 2019, 0956-5663
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10405 Electrochemistry
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 10.257
Kód RIV
RIV/00216224:14310/19:00109285
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000464296300017
Klíčová slova anglicky
Flunitrazepam; Rohypnol; Drug-facilitated sexual assault; Date-rape drugs; Screen-printed sparked electrodes; Point-of-need voltammetric sensors
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 17. 3. 2020 11:55, Mgr. Marie Šípková, DiS.
Anotace
V originále
Flunitrazepam, also known as “Rohypnol” or “Rophy” among other trade and street names, is an extremely potent benzodiazepine that is prescribed to treat severe insomnia. Due to these attributes, flunitrazepam, when is surreptitiously administered to an alcoholic or soft drink, is associated with “drug-facilitated sexual assault”. We report here for the first time, a low cost lab-on-a-screen-printed electrochemical cell (SPC) based on iron-sparked graphite working electrode modified with glucose oxidase (GOx) and glucose hydrogel droplets (GluHD) for the detection of flunitrazepam. Iron-spark modification increases the response of the sensor by ca. 3-fold compared with that of the plain electrode, while an in situ deoxygenation process, based on GOx-glucose enzyme reaction, depletes dissolved oxygen. As a result, the method enables interference free voltammetric measurements of the electro reduction of the nitro group of flunitrazepam at ca. -0.71 to -0.78 V vs. Ag printed pseudo reference electrode depending on the sample's matrix, and the detection of the drug at the sub-millimolar level. GOx/GluHD-FeSPC was directly applied to the drop-volume (~60 uL) detection of flunitrazepam to a wide range of untreated and undiluted spiked samples (Pepsi cola, Vodka, Whisky, Tequila, Gin, and Rum) of different acidity (pH 2.3–8.4), and alcohol content up to 40% v/v. Data demonstrate the excellent performance of the sensor for point-of-need screening of flunitrazepam and suggest that GOx/GluHD-FeSPC holds promise as an effective analytical tool to prevent phenomena of covert drug administration.