Fertiliser characterisation using optical and electrical impedance methods

This paper addresses the problem of fertiliser characterisation using optical and electrical impedance methods. Comparative analysis was performed to estimate the methods effectiveness for quantitative and qualitative characterisation of water diluted fertiliser. Characterisation using optical method within the deep ultraviolet range indicates the variability of features that was not observed when using the impedance method. The combination of both methods showed potential for more accurate qualitative analysis than each method alone. Finally, both methods showed good sensitivity to fertiliser concentration variation that was possible to fit with a linear function for optical spectroscopy (R2=0.95) and an exponential function for the impedance method (R2=0.99).