Login for students

Login for employees

Publication detail

Voltammetric determination of trinitrotoluene (TNT) at antimony-modified glassy carbon paste electrode in polluted soil sample collected in an industrial area
Authors: Švancara Ivan | Dellingerová Barbora | Sopha Hanna Ingrid
Year: 2018
Type of publication: článek v odborném periodiku
Name of source: Scientific Papers of the University of Pardubice, Series A, Faculty of Chemical Technology
Page from-to: 5-20
Titles:
Language Name Abstract Keywords
cze Voltametrické stanovení trinitrotoluenu (TNT) na antimonovým filmem modifikované uhlíkové pastové elektrodě ve vzorcích půdy Příspěvek se zabývá stanovením průmyslové trhaviny, 2,4,6-trinitrotoluenu (TNT), v reálných vzorcích půdy odebrané v odpališti, příp. v jeho blízkosti, v areálu továrny na výrobu této výbušiny. Metoda je založena na použití pracovní elektrody typu uhlíkové pasty zhotovené z práškovitého skelkného uhlíku s vylučovaným filmem antimonu v režimu ex-situ a ve spojení se square-wave katodickou stripping voltametrií (SWCSV). Vzorky byly analyzovány po extrakci do směsi 0,5 M kyseliny octové v 30% methanolu a k měření upraveny přídavkem pevného NaHCO3 a Britton-Robinsonova pufru. Obsah TNT v analyzovaných vzorcích se pohyboval v jednotkách mg na 1 kg půdy a dosažené výsledky vesměs odpovídaly srovnávací analýze s pomocí GC/MS. antimonový film; elektroda ze skelného uhlíku; rozpouštěcí voltametrie; trinitrotoluen
eng Voltammetric determination of trinitrotoluene (TNT) at antimony-modified glassy carbon paste electrode in polluted soil sample collected in an industrial area 2,4,6-trinitrotoluene (TNT) in polluted soil sampled in the area of a factory producing industrial explosives could be determined using an antimony film pre-plated ex-situ onto a glassy-carbon paste electrode (SbF-GCPE) in combination with square-wave cathodic stripping voltammetry (SWCSV). For electrochemical measurements in Britton-Robinson buffer (BRB, pH 9), the substance of interest had to be transferred from solid sample into the solution by extracting with aqueous or water / methanolic media of chosen composition and adjusted pH, in some cases, followed by neutralising the extracts with solid NaHCO3. A comparison of the results from analyses of four different solutions has allowed us to evaluate the most effective extracting agent, which was the case of a mixture of 0.5 M CH3COOH in 30% CH3OH neutralised with solid NaHCO3, and further diluted with BRB (pH 9) in order to yield pH 8. In this medium, the SWCSV analysis with SbF-GCPE has resulted in the content of 3.77 ug TNT in 10 mL extract, which corresponded to the same contents in mg per 1 kg of dried soil. This has represented ca. 85% recovery with the result obtained with GC/MS, which can still be considered as acceptable agreement. Antimony film; Glassy carbon paste electrode; Cathodic stripping voltammetry; Trinitrotoluene (TNT); Determination; Polluted soil

Departments

Other Parts

Map

en.mapy.cz

Services

Popular Links

© 2023 University of Pardubice, Studentská 95, 532 10 Pardubice 2
Phone: +420 466 036 111, 466 036 112, 466 036 113
Webmaster, RSS
Data box ID: f5vj9hu
Accessibility Statement
CC BY-NC-ND 4.0Creative CommonsAttributionNonCommercialNoDerivatives