Multi-ion analysis based on versatile sensor head

A new, versatile head for chemical sensor measurement was applied for quasi-monitoring of lake and oligocene water. The calibration process of Na+, Ca2+, NO3− sensitive CHEMFETs and Cl− selective solid state electrodes (SSEs) was developed. The performances (selectivity coefficients, slopes, response times) and the results of determination of the chosen ions in water from various sources were presented. Obtained results were compared with determinations using different analytical methods as AAS, UV–VIS spectrophotometry, and potentiometric titration using Ag2S electrode.