All‐solid‐State Potentiometric Cu(II)‐selective Sensor Based on Ion Imprinted Methacrylamide Polymer

Abstract

In this study; a novel all‐solid‐state type potentiometric microsensor based on ion‐imprinted polymer (IIP) has been developed for Cu(II) sensing. The IIP was synthesized by suspension polymerization by using Cu(II) ion, methacrylamide, methacrylic acid and ethylene glycol dimethacrylate as template, functional monomers and cross‐linker respectively. The resultant Cu(II)‐imprinted polymer was used as ionophore in the structure of the PVC membrane to obtain a selective potentiometric response towards Cu(II) ions. The fabricated microsensor exhibited a highly selective Nernstian response (28.6±2.2 mV per decade) over the concentration range of 10−1 to 10−6 mol L−1 of Cu2+ ion for 2 months without any considerable divergence in potentials. The response time of the microsensor was considerably short (less than 15 s) and its detection limit was determined as 7.6×10−7 mol L−1. The microsensor was effectively performed in the pH range of 4–7. The microsensor was successfully used as an indicator electrode in the potentiometric titration of Cu(II) ions with EDTA. The proposed microsensor was also used for the determination of Cu(II) contents of some environmental water samples. The obtained potentiometric results were in good harmony with the results obtained by the AAS method.

Micro-Sized Glucose Biosensor Based On Composite pH Sensor

“…The repeatability of the composite pH sensor response was tested with measurements taken randomly in the pH 2 and pH 12 buffer solutions as shown in Figure 5. The composite pH sensor exhibited a good repeatability when compared with the results [19]- [22]. The linear dependence of the glucose concentration has a correlation coefficient of 0.9943.…”

Potentiometric Sensing

“…It is not clear whether the reported values represent logarithmic or absolute selectivity values, but in either case, the values suggest a rather poor selectivity of the sensor. Yolcu and Dere described a Cu 2+ -selective electrode based on another imprinted polymer synthesized with the [Cu 2 (methacrylic acid) 4 (methacrylamide) 2 ] complex as a monomer, AIBN as an initiator, and EGDMA as a cross-linker . The Cu 2+ -imprinted polymer and a cation exchanger were incorporated into a plasticized PVC membrane to give a near-Nernstian slope (28.6 mV/decade) in the concentration range of 10 –6 –10 –1 M. Unfortunately, the selectivity of the sensor was limited (e.g., log K Cu 2+ ,Zn 2+ Pot = −2.8 or log K Cu 2+ ,Na 2+ Pot = −2.55).…”

“…Yolcu and Dere described a Cu 2+ -selective electrode based on another imprinted polymer synthesized with the [Cu 2 (methacrylic acid) 4 (methacrylamide) 2 ] complex as a monomer, AIBN as an initiator, and EGDMA as a cross-linker. 129 The Cu 2+ -imprinted polymer and a cation exchanger were incorporated into a plasticized PVC membrane to give a near-Nernstian slope (28.6 mV/decade) in the concentration range of 10 −6 −10 −1 M. Unfortunately, the selectivity of the sensor was limited (e.g., log…”

Kil Esaslı Bütünüyle-Katı-Hal Kompozit Kurşun (II)-Seçici Potansiyometrik Elektrot

“…Duyarlı membran yapısına iyonoforların kovalent olarak tutturulması veya akma özelliği olmayan iyonofor özelliği gösteren katı hal mikro/nano yapılı materyallerin iyonofor olarak kullanılması bu riskleri azaltmaktadır. Bu bağlamda; killer [10,11] modifiye karbon temelli nano materyaller [12][13][14], baskılanmış polimerler [15][16][17]…”