JOANNEUM RESEARCH Forschungsgesellschaft mbH - Materials, Franz-Pichler-Straße 30, A-8160 Weiz, Austria.
Medical University of Graz, Center for Medical Research, Stiftingtalstraße 24, A-8010 Graz, Austria.
Talanta. 2017 Aug 1;170:481-487. doi: 10.1016/j.talanta.2017.04.029. Epub 2017 Apr 12.
A colourimetric sensor layer has been developed for ammonia and biogenic amines. Amine exposure induces a traffic light colour change from green to red. Recognition is performed by a pH indicator dye, covalently immobilised onto cellulose microparticles. The sensor microparticles are embedded into food-grade silicone. Selectivity of the pH indicator dye towards gaseous amine is obtained by complete embedding of the sensor particles within the ion-impermeable silicone. A response time of 1.5h has been achieved, with a reverse response occurring after 20h. This time frame is considered sufficient for spoilage processes. Cytotoxicity studies confirm the layers are non-toxic.
已经开发出一种用于氨和生物胺的比色传感器层。暴露于胺会导致颜色从绿色变为红色的信号灯颜色变化。识别是通过共价固定在纤维素微球上的 pH 指示剂染料来完成的。传感器微球嵌入食品级硅酮中。通过将传感器颗粒完全嵌入离子不可渗透的硅酮中，获得了 pH 指示剂染料对气态胺的选择性。已经实现了 1.5 小时的响应时间，并且在 20 小时后发生了反向响应。这个时间框架被认为足以用于变质过程。细胞毒性研究证实这些层没有毒性。
