title: A solid colorimetric sensor for the analysis of amphetamine-like street samples.
abstract: A solid sensor obtained by embedding 1,2-naphthoquinone-4-sulfonate (NQS) into polydimethylsiloxane/tetraethylortosilicate/silicon dioxide nanoparticles composite has been developed to identify and determine amphetamine (AMP), methamphetamine (MAMP), 3,4-methylenedioxymetamphetamine (MDMA) and 3,4-methylenedioxyamphetamine (MDA). The analytes are derivatized inside the composite for 10 min to create a colored product which can be then quantified by measuring the diffuse reflectance or the color intensity after processing the digitalized image. Satisfactory limits of detection (0.002-0.005 g mL-1) and relative standard deviations (<10%) have been achieved. The proposed kit has been successfully validated and applied to the analysis of amphetamine-like drugs street samples. The kit allows the in-situ screening of the mentioned illicit drugs owing to its simplicity, rapidity and portability, with excellent sensor stability and at a very low-cost.
authors: MINTOTA Research Group, Departament de Química Analítica, Facultat de Química, Universitat de Valencia, C/ Doctor Moliner, 50, Burjassot, 46100 Valencia, Spain.
authors: A
authors: A
authors: Argente-García
authors: MINTOTA Research Group, Departament de Química Analítica, Facultat de Química, Universitat de Valencia, C/ Doctor Moliner, 50, Burjassot, 46100 Valencia, Spain.
authors: N
authors: N
authors: Jornet-Martínez
authors: MINTOTA Research Group, Departament de Química Analítica, Facultat de Química, Universitat de Valencia, C/ Doctor Moliner, 50, Burjassot, 46100 Valencia, Spain. Electronic address: rosa.herraez@uv.es.
authors: R
authors: R
authors: Herráez-Hernández
authors: MINTOTA Research Group, Departament de Química Analítica, Facultat de Química, Universitat de Valencia, C/ Doctor Moliner, 50, Burjassot, 46100 Valencia, Spain.
authors: P
authors: P
authors: Campíns-Falcó
mesh_terms: D000662:Amphetamines / Q000032:analysis*; D003124:Colorimetry / Q000295:instrumentation*; D013287:Illicit Drugs / Q000032:analysis*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000662:Amphetamines; D013287:Illicit Drugs
keywords: Amphetamines; Ecstasy; In-situ analysis; MDMA; Solid sensors; Street samples