As expected the measurement based on both ionophores were of high precision but low accuracy due to complexity of the samples. Because of this we have prepared an array of syringe electrodes forming an electronic tongue, that could account for the changes of the background composition of the samples without the need for recalibration. Fig. Comparison of potassium ion concentration from information on the package and measured with a valinomycin ISE syringe electrode in different types of samples. Each sample was measured 3 times, the number of samples in each category is given in the brackets.