Use of ion-selective electrodes for determination of content of potassium in Egner-Rhiem soil extracts
2007
Ciesla, J.,Polish Academy of Sciences, Lublin (Poland). Inst. of Agrophysics | Ryzak, M.,Polish Academy of Sciences, Lublin (Poland). Inst. of Agrophysics | Bieganowski, A.,Polish Academy of Sciences, Lublin (Poland). Inst. of Agrophysics | Tkaczyk, P.,Regional Chemical-Agricultural Station, Lublin (Poland) | Walczak, R.T.,Polish Academy of Sciences, Lublin (Poland). Inst. of Agrophysics
The objective of this work was to evaluate the use of valinomycin-based ion selective sensors in the determination of potassium concentrations in Egner-Rhiem soil extracts. Flame photometry was used as a reference method. Results obtained from potentiometric and photometric methods in soil extracts correlated linearly (R2=0.84). Analysis of soil extracts by the ion selective electrodes is simple and there is not a need for calcium ions precipitation.
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