A novel impedimetric sensor for trace level detection of dimethyl sulfide (DMS)
- PDF / 2,664,120 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 85 Downloads / 213 Views
A novel impedimetric sensor for trace level detection of dimethyl sulfide (DMS) Hassan Iden1,2 · Ricardo Adriano Dorledo de Faria1,3 · Luiz Guilherme Dias Heneine4 · Tulio Matencio5 · Younès Messaddeq1,6 Received: 17 February 2020 / Accepted: 12 May 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract An easy and effective method for the preparation of a new impedimetric sensor used in the detection of dimethyl sulfide (DMS) at a nanomolar level is presented. The sensor was prepared in two steps from a commercially available screen-printed carbon electrode (SPCE): a simple activation of the SCPE using cyclic voltammetry followed by electroless plating of the working electrode surface with gold clusters. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) techniques confirmed the successful functionalization of the SPCE, revealing the presence of gold particles dispersed on the carbon matrix. Electrochemical impedance spectroscopy (EIS) was used to study the sensitivity of the sensor towards DMS dissolved in aqueous solution and simulated ocean water. Analyses were performed in less than 3 min, and the sensor showed linearity in a concentration range from 1.0 × 10−10 to 1.0 × 10−8 M with a limit of detection of 1.50 × 10−9 M and a limit of quantification of 2.27 × 10−9 M. To simulate the marine environment in which DMS is naturally present in nature, the impedance of the sensor was monitored by online EIS. Moreover, results indicated that, despite not linearly, the sensor is a promising tool to detect the analyte even at 1.0 × 10−11 M, presenting an increase of resistance of 13.5% in relation to its bare condition.
1 Introduction Volatile organic sulfur compounds (VOSCs) have assigned to have an essential environmental function in global cycle warming, in acid rain creation, as well as in clouds’ formation [1–5]. Dimethyl sulfide (DMS) is a biogenic gas that belongs to VOSCs family and considered as a major component in VOSCs [6, 7]. DMS gas existed in water and earth. The majority of atmospheric DMS gas is believed * Younès Messaddeq [email protected] 1
Center for Optics, Photonics and Lasers (COPL), Université Laval, Quebec, Canada
2
CDN Isotopes, Montreal, Canada
3
Department of Chemical Engineering, Universidade Federal de Minas Gerais (UFMG), Minas Gerais, Brazil
4
Laboratory of Applied Immunology, Fundação Ezequiel Dias (FUNED), Minas Gerais, Brazil
5
Department of Chemistry, Universidade Federal de Minas Gerais (UFMG), Minas Gerais, Brazil
6
Institute of Chemistry, UNESP, São Paulo, Brazil
to be produced in the marine environment by the degradation of dimethyl sulfopropionate (DMSP) via an enzyme called DMSP lyase [8, 9]. DMSP is a metabolite produced by marine phytoplankton, algae, and some marine plants when they feel stressed in any environmental change [10, 11] while DMSP plays the role of osmoprotective agent for these species, its degradation by DMSP lyase liberates DMS gas, acrylic acid, and other compone
Data Loading...
