期刊
TALANTA
卷 170, 期 -, 页码 481-487出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2017.04.029
关键词
Optical sensor layer; Visual indicator; Food sensor; Spoilage; Amine indicator
资金
- project SenFood [843582]
- Research Studios Austria project SmartColourTextiles of the Austrian Research Promotion Agency (FFG) [844724]
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 1.5 h has been achieved, with a reverse response occurring after 20 h. This time frame is considered sufficient for spoilage processes. Cytotoxicity studies confirm the layers are non-toxic.
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