A novel impedimetric sensor for trace level detection of dimethyl sulfide (DMS)

被引:2
|
作者
Iden, Hassan [1 ,2 ]
Dorledo de Faria, Ricardo Adriano [1 ,3 ]
Dias Heneine, Luiz Guilherme [4 ]
Matencio, Tulio [5 ]
Messaddeq, Younes [1 ,6 ]
机构
[1] Univ Laval, Ctr Opt Photon & Lasers Cope, Quebec City, PQ, Canada
[2] CDN Isotopes, Montreal, PQ, Canada
[3] Univ Fed Minas Gerais UFMG, Dept Chem Engn, Belo Horizonte, MG, Brazil
[4] Fundacao Ezequiel Dias FUNED, Lab Appl Immunol, Belo Horizonte, MG, Brazil
[5] Univ Fed Minas Gerais UFMG, Dept Chem, Belo Horizonte, MG, Brazil
[6] Univ Estadual Paulista, Inst Chem, Sao Paulo, Brazil
基金
加拿大自然科学与工程研究理事会;
关键词
ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; SOLID-PHASE MICROEXTRACTION; LABEL-FREE; CORROSION BEHAVIOR; GAS-CHROMATOGRAPHY; VAPOR GENERATION; SULFUR-COMPOUNDS; CARBON-STEEL; DIMETHYLSULFONIOPROPIONATE; AIR;
D O I
10.1007/s10854-020-03588-0
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 x 10(-10) to 1.0 x 10(-8) M with a limit of detection of 1.50 x 10(-9) M and a limit of quantification of 2.27 x 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 x 10(-11) M, presenting an increase of resistance of 13.5% in relation to its bare condition.
引用
收藏
页码:10398 / 10407
页数:10
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