Niemiec Barbara, Piech Robert, Paczosa-Bator Beata
Faculty of Materials Science and Ceramics, AGH University of Krakow, Mickiewicza 30, PL-30059 Krakow, Poland.
Molecules. 2025 Feb 28;30(5):1118. doi: 10.3390/molecules30051118.
This paper presents the application of a multi-sensor with a renewable surface based on a carbon black paste modified with ruthenium dioxide hydrate for monitoring the concentration changes of four ionic compounds (nitrate, ammonium, sodium, and calcium). By combining these into one sensor body, analyses can be performed simultaneously, based on a single standard curve, on a small number of available samples. The multi-sensor electrodes were characterized by determining both their electrical parameters, using methods such as chronopotentiometry and electrochemical impedance spectroscopy, and analytical parameters, through a series of potentiometric tests. The electrodes were characterized by high electric charge capacities ranging from 80 µF for the sodium electrode to 257 µF for the nitrate electrode. The tested electrodes showed calibration curve slopes of -51.1 mV/dec for the nitrate electrode, 59.3 mV/dec for the ammonium electrode, 57.0 mV/dec for the sodium electrode, and 26.0 mV/dec for the calcium electrode. The multi-sensor parameters allow for free determination of ions of biological significance in river water samples, soil samples, and plant substrates. The multi-sensor presented in this work can be successfully used to analyze water or plant substrates at home or among commercial crops.
本文介绍了一种基于水合二氧化钌改性炭黑糊的具有可再生表面的多传感器在监测四种离子化合物（硝酸盐、铵、钠和钙）浓度变化方面的应用。通过将这些集成到一个传感器主体中，可以基于单一标准曲线，对少量可用样品同时进行分析。多传感器电极通过计时电位法和电化学阻抗谱等方法测定其电学参数，并通过一系列电位测试来表征其分析参数。电极的特点是具有较高的电荷容量，钠电极的电荷容量为80μF，硝酸盐电极的电荷容量为257μF。测试电极的校准曲线斜率分别为：硝酸盐电极-51.1 mV/dec、铵电极59.3 mV/dec、钠电极57.0 mV/dec、钙电极26.0 mV/dec。多传感器参数允许自由测定河水样品、土壤样品和植物基质中具有生物学意义的离子。本文介绍的多传感器可成功用于家庭或商业作物中对水或植物基质的分析。
