Abstract
A portable, low cost sensing system is described which interfaces to an electronictongue sensor. The sensor used is a voltammetric sensor which monitors electrochemicalreactions that occur in solutions. The sensor is able to test a range of liquids with differentelectrochemical properties without any hardware adjustments to the system. The system canautomatically adjust for the change in solution properties by performing a routine whichuses an auto-ranging feature to determine a current-to-voltage conversion of the sensor databy using a binary search strategy. This eliminates the intervention of the user to modify thesystem each time a new solution is tested. The effectiveness of the calibration routine wastested by carrying out cyclic voltammetry in two different solutions, 0.1M sulfuric acidsolution and the phosphate buffered solution of pH3. The sensor system was able toaccurately acquire the sensor data for each solution.
Highlights
It has become more typical in recent years to apply a multi-sensing approach in the collection and processing of information
This type of electronic tongues (ET) was first developed by Winquist et al [22] and has been applied in a number of different applications ranging from mold discrimination [26], detergent detection [27] to discriminating different types of tea [28]
The housings are replaced on a yearly basis, it is probable that the electrode could operate over an even longer period of time
Summary
It has become more typical in recent years to apply a multi-sensing approach in the collection and processing of information. The ET, as the name suggest, mimics the sense of taste This has found application where liquids/fluids require analysis e.g. the food industry [13,14,15,16], environmental [17,18], pharmaceutical [19] and medical [20]. The ability of the ET to provide information inline is a big advantage over a taste panel providing information on the processed product This system will be more suitable that the commercially available ETs for example the ASTREE electronic tongue from AlphaMos. The ASTREE is a very powerful system which finds application in many areas including the pharmaceutical and food industry. In order for the ET to be successfully used in the monitoring of food procedures it is essential to provide a rugged sensor that can be inserted into various locations within the rigs and a portable system that will fully accommodate the movement of the sensor to strategic locations in the food rigs and will accurately monitor the sensor operations
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