Scientists in Germany have designed a simple polymer that can be used in a sensor to distinguish between similar fruit juices.
Sensors that analyse food, drink and drugs are important for quality control and preventing fraud. Chemo-optical sensors, or tongues, already exist for testing wine, coffee, whiskey and other beverages. Due to the complex nature of these samples, the tongues comprise a number of sensors, which undergo structural changes to provide a colour or fluorescence pattern in the presence of various analytes. Chemometric techniques then analyse the pattern, reporting the distinct ‘taste’ for each product.
This paper is free to access until 5th April, 2017:
Poly(p-phenyleneethynylene)-based tongues discriminate fruit juices
Jinsong Han, Benhua Wang, Markus Bender, Kai Seehafera and Uwe H.F. Bunz
Analyst, 2017,142, 537-543