Pentamethinium Salts Nanocomposite for Electrochemical Detection of Heparin

This study presents a simple route to heparin detection and develops a voltammetric approach using supramolecular principles and nanomaterials. Nanocomposites, including gold nanoparticles (AuNPs) and gamma-substituted pentamethinium salts (PMS) deposited on a glass carbon (GC) electrode surface (GC/AuNPs/PMS) and covered by a plasticized poly(vinyl chloride) (PVC) membrane, are proposed for heparin detection. The conductivity of the nonconducting PVC-plasticized membrane is guaranteed by AuNPs, and the selectivity is provided by the interaction between gamma-substituted PMS and anionic analytes. In order to extend the linear range, it is necessary to apply a solvent compatible with PVC-plasticized membrane, namely tetrahydrofuran. The proposed voltammetric sensor showed a concentration dependence from 1.72 up to 45.02 IU mL(-1) heparin and was used for heparin detection in saline and biological samples with recovery of 95.1-100.9%.

Automated summary

This study introduces a simple method for heparin detection using supramolecular principles and nanomaterials. A voltammetric sensor is developed by depositing AuNPs and PMS nanocomposites on an electrode surface and covering them with a PVC membrane, enabling detection of heparin with a recovery rate of 95.1-100.9%.