kaz65Почвоведение и агрохимияSoil Science and Agrichemistry1999-740X2959-3433Казахский научно-исследовательский институт почвоведения и агрохимии имени У.У. Успановаkaz65-431Research ArticleSOIL CHEMISTRYSIMULTANEOUS EXTRACTION AND POTENTIOMETRIC DETERMINATION OF POTASSIUM AND NITRATE IN SOIL BY USING ION SELECTIVE ELECTRODESSevinKaradagsevinckarada9@mirholdin9.com.trEmelErennoemail@neicon.ruEbruVetinkayanoemail@neicon.ruAll§enlikcinoemail@neicon.ruSelinOzennoemail@neicon.ruSedaDevecinoemail@neicon.ruMir Arastirma ve Gelistirme A.SKazakhstan201407112022046977Copyright © Sevin K., Emel E., Ebru V., All §., Selin O., Seda D., 20222022Sevin K., Emel E., Ebru V., All §., Selin O., Seda D.Sevin K., Emel E., Ebru V., All §., Selin O., Seda D.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://journal.soil.kz/jour/article/view/431

Было исследовано быстрое и одновременное определение нитратов (NO3-) и ионов калия (K+) в почвенных образцах с использованием ионоселективных электродов (ИСЭ). Совместимость ИСЭ с раствором экстракции почвы является сложным объектом, так как нужно рассматривать различные эффекты, такие как рН, сила иона и помехи, а также эффективность экстракционного раствора. В данном исследовании, были взяты 30 образцов почвы сельскохозяйственного предназначения с различными свойствами с 0,01 моль. L-1 Al2(SO4)3 и экстракты одновременно измеряли при помощи NO3- - ISE и K - ISE в проточной системе. Результаты были сопоставлены с помощью ионной хроматографии (IC) в качестве эталонного метода, а регрессионный анализ результатов ИС и ISE показал высокую корреляцию (R2 = 0,986 и R2 = 0,951 для K и NO3-, соответственно). Был сделан вывод, что, ионоселективные электроды могут быть использованы с экстракционным раствором 0.01 mole. L-1 Al2(SO4)3 моль для быстрого и одновременного определения нитратов и калия в образцах почвы.

Rapid and simultaneous determination of nitrate (NO-) and potassium (K+) ions in soil samples using ion selective electrodes (ISE) was investigated. The compatibility of ISEs with soil extraction solution is a challenging subject as various effects such as pH, ionic strength and interferences have to be considered as well as efficiency of the extraction solution. In this study, 30 agricultural soil samples of different properties were extracted with 0.01 mole.L-1 Al2(SO4)3 and the extracts were simultaneously measured by NO- - ISE and K+ - ISE in a flow system. The results were compared with ion chromatography (IC) as the reference method, and the regression analysis between IC and ISE results was yielded high correlation (R2 = 0.986 and R2 = 0.951 for K+ and NO3-, respectively). It was concluded that, ion selective electrodes can be used with 0.01 mole.L-1 Al2(SO4)3 extraction solution for rapid and simultaneous determination of nitrate and potassium in soil samples.

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The authors declare that there are no conflicts of interest present.