A novel PVC-membrane potentiometric sensor based on molecularly imprinted polymer for the determination of rhodamine B
Monatshefte fur Chemie, vol.157, no.1, pp.1-11, 2026 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 157 Issue: 1
- Publication Date: 2026
- Doi Number: 10.1007/s00706-025-03404-7
- Journal Name: Monatshefte fur Chemie
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex
- Page Numbers: pp.1-11
- Keywords: Molecularly imprinted polymer, Potentiometric determination, PVC membrane electrode, Rhodamine B determination, Selective electrode
- Erciyes University Affiliated: Yes
Abstract
A rhodamine B (RH-B)-imprinted functional polymer was synthesized by free radical polymerization, utilizing RH-B as the template, methacrylic acid as the functional monomer, and ethyleneglycol dimethylacrylate as the cross-linker. The synthesized RH-B-imprinted polymer was characterized by FT-IR measurements. A novel RH-B-selective potentiometric poly(vinyl chloride) (PVC) membrane sensor was fabricated using this newly synthesized RH-B-imprinted functional polymer as the ionophore. Membrane optimization studies revealed that the most satisfactory membrane composition, yielding the best potentiometric parameters, comprised 32.0% (w/w) PVC, 64.0% (w/w) dibutyl phthalate, 3.0% (w/w) RH-B-imprinted polymer, and 1.0% (w/w) potassium tetrakis(4-chlorophenyl)borate. Further investigations into the potentiometric performance characteristics of the optimum composition demonstrated that the sensor exhibited a linear response to RH-B within the concentration range of 1.0 × 10–7 to 1.0 × 10–2 M with a detection limit of 1.0 × 10–8 M and a near Nernstian slope of 67.37 mV/decade. The sensor’s analytical proficiency was evidenced by its precise quantification of RH-B in RH-B-spiked rose-water samples, resulting in satisfactory recovery rates.