Figure - available via license: Creative Commons Attribution 4.0 International
Content may be subject to copyright.
Source publication
In this work, the stability, electrical conductivity, and versatility of graphite-based inks were taken advantage of to fabricate a nitrate potentiometric sensor. One other key property that was exploited for the design of an ion-selective electrode was the hydrophobicity of graphite. This prevented the formation of a water layer between the solid...
Contexts in source publication
Context 1
... the LOD, a slight increase was observed when interferents were at play, changing from 0.24 mM to 0.36 mM in 8.5 mM Cl − and to 0.28 mM in 4.9 mM of HCO 3 − . The respective potentiometric selectivity coefficient (K pot ), calculated for each interferent using Equation (2), can be found in Table 2. Since these constants were calculated as a ratio of the LOD, the closest they were to 1, the lower the effect of that anion was. ...Context 2
... has been further proven by analyzing several samples of different matrix compositions. Even when operating close to its LOD and with an interferent concentration five times higher than the analyte (Table 2), the sensor, after mathematical compensation for the interferent, only yielded a 7% error when compared with ionic chromatography. In spiked samples, the error was at a maximum of 6%. ...Citations
... This report also demonstrated the detection of Cu 2+ and CN − in cellular imaging, TLC plates, and blended polymer membrane studies. F. Paré and co-workers reported their electrochemical detection of NO 3 − via direct ink writing [14], wherein, graphite-based inks with hydrophobicity were used to avoid the formation of a water layer between the solid contact and the polymeric selective membrane. J. Kumar et al. delivered the utilization of the rhodamine derivative linked silica coated upconverting nanophosphor (NaYF 4 : Yb 3+ /Er 3+ @SiO 2 -RBDA) for the ratiometric detection of Pb 2+ [15]. ...
The advancement in chemosensory research towards the ionic species quantitation becomes vital to securing the environment for the future [...]
... They were different from each other, for example, in the inner electrode and material of the intermediate layer. In article [23], the structure of the electrode was developed by using screen-printing technology, in which the working electrode was a graphite electrode deposited from a graphite-based ink, was described. Graphite was used as the transducer layer due to its stability, as well as its good conductive and hydrophobic properties. ...
Ion-selective electrodes are a popular analytical tool useful in the analysis of cations and anions in environmental, industrial and clinical samples. This paper presents an overview of new materials used for the preparation of anion-sensitive ion-selective electrodes during the last five years. Design variants of anion-sensitive electrodes, their advantages and disadvantages as well as research methods used to assess their parameters and analytical usefulness are presented. The work is divided into chapters according to the type of ion to which the electrode is selective. Characteristics of new ionophores used as the electroactive component of ion-sensitive membranes and other materials used to achieve improvement of sensor performance (e.g., nanomaterials, composite and hybrid materials) are presented. Analytical parameters of the electrodes presented in the paper are collected in tables, which allows for easy comparison of different variants of electrodes sensitive to the same ion.
