COLORIMETRIC SENSOR BASED ON SILVER NANOPARTICLES FOR THE DETERMINATION OF VOLATILE SULFUR COMPOUNDS

The invention relates to a colorimetric solid sensor for the detection and/or determination of volatile sulfurs in gases or in any matrix in which volatile sulfurs exist or are generated. The sensor is based on silver nanoparticles immobilised in a membrane. The sensor enables, in a portable (in sit...

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Bibliographische Detailangaben
Hauptverfasser:	CAMPÍNS FALCÓ, Pilar, HERRÁEZ HERNÁNDEZ, Rosa, ARGENTE GARCÍA, Ana Isabel, MOLINS LEGUA, Carmen, JORNET MARTÍNEZ, Neus, MOLINER MARTÍNEZ, Yolanda, VERDÚ ANDRÉS, Jorge
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER MANUFACTURE OR TREATMENT OF NANOSTRUCTURES MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES MEASURING NANOTECHNOLOGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS POWDER METALLURGY SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES TESTING THEIR RELEVANT APPARATUS TRANSPORTING WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	The invention relates to a colorimetric solid sensor for the detection and/or determination of volatile sulfurs in gases or in any matrix in which volatile sulfurs exist or are generated. The sensor is based on silver nanoparticles immobilised in a membrane. The sensor enables, in a portable (in situ) manner and in a passive manner, in only 10 minutes, simple detection/determination by visual observation, using the RGB coordinates of a digital image and/or diffuse reflectance. The sensor displays adequate selectivity for monitoring volatile sulfur compounds and it has been observed that same do not interfere in the detection of other volatile compounds such as a amines, ethanol or acetone. The detector has good sensitivity, with detection and quantification limits of 45 ppb v/v and 150 ppb v/v, respectively, obtained by measuring colour by means of diffuse reflectance.