Dispositivo pasivo para la detección y/o determinación in situ de aminas en gases

摘要

A sensor for the detection and/or determination in situ of amines in air, such as atmospheric air, is obtained by means of a direct, easy and reproducible synthesis consisting in soaking the derivatisation agent sodium 1,2-naphthoquinone-4-sulfonate (NQS) in polydimethylsiloxane (PDMS). It has been shown that the device can detect amine concentrations of 3 mg/m3 in 5 hours. Both the device and its response to the presence of amines remain stable over time. In addition, no external source is required for detection (i.e. it is a passive sensor that allows amines to be detected by means of visual inspection), requiring zero energy cost and having no toxicity, since both the NQS and the PDMS are non toxic.