Mostrar el registro sencillo del ítem

dc.contributor.authorVargas, Alejandro P.
dc.contributor.authorGámez Márquez, Francisco 
dc.date.accessioned2021-03-05T11:22:37Z
dc.date.available2021-03-05T11:22:37Z
dc.date.issued2021
dc.identifier.citationVargas, A.P.; Gámez, F.; Roales, J.; Lopes-Costa, T.; Pedrosa, J.M. A Paper-Based Ultrasensitive Optical Sensor for the Selective Detection of H2S Vapors. Chemosensors 2021, 9, 40. https:// doi.org/10.3390/chemosensors9020040es_ES
dc.identifier.urihttp://hdl.handle.net/10481/66926
dc.description.abstractA selective and inexpensive chemical paper-based sensor for the detection of gaseous H2S is presented. The triggering of the sensing mechanism is based on an arene-derivative dye which undergoes specific reactions in the presence of H2S, allowing for colorimetric analysis. The dye is embedded into a porous cellulose matrix. We passively exposed the paper strips to H2S generated in itu, while the absorbance was monitored via an optic fiber connected to a spectrophotometer. The kinetics of the emerging absorbance at 534 nm constitute the sensor response and maintain a very stable calibration signal in both concentration and time dimensions for quantitative applications. The time and concentration dependence of the calibration function allows the extraction of unusual analytical information that expands the potential comparability with other sensors in the literature, as the limit of detection admissible within a given exposure time. The use of this specific reaction ensures a very high selectivity against saturated vapors of primary interferents and typical volatile compounds, including alkanethiols. The specific performance of the proposed sensor was explicitly compared with other colorimetric alternatives, including standard lead acetate strips. Additionally, the use of a smartphone camera to follow the color change in the sensing reaction was also tested. With this straightforward method, also affordable for miniature photodiode devices, a limit of detection below the ppm scale was reached in both colorimetric approaches.es_ES
dc.description.sponsorshipOperative Programme FEDER-Andalucia (2014-2020, objective 1.2.2., A1122062E0) through project AT17-5549 from the Junta de Andalucía (CECEU)es_ES
dc.description.sponsorshipState Research Agency of Spain through projects PID2019-110430GB-C22, PID2019-105195RA-I00 and PCI2020-112241es_ES
dc.language.isoenges_ES
dc.publisherMDPIes_ES
dc.rightsAtribución 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subjectOptical gas sensores_ES
dc.subjectChemical sensores_ES
dc.subjectToxic gaseses_ES
dc.subjectColorimetric probeses_ES
dc.titleA Paper-Based Ultrasensitive Optical Sensor for the Selective Detection of H2S Vaporses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.doi10.3390/chemosensors9020040


Ficheros en el ítem

[PDF]

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem

Atribución 3.0 España
Excepto si se señala otra cosa, la licencia del ítem se describe como Atribución 3.0 España