This paper presents a potentiometric biosensor for the detection of amyloid β-42 (Aβ-42) in point-of-care analysis. approach is based on molecular imprint polymer (MIP) technique, which uses covalently immobilised Aβ-42 to create specific cavities surface single-walled carbon nanotubes (SWCNTs). The was prepared by binding SWCNT and then imprinting it adding acrylamide (monomer), N,N′-methylene...

In this paper, we report the concept of an aptamer (Ap)-based nanofilter interface for suppression nonspecific signals generated by interfering species in biological samples. As a model target small biomolecule, l-3,4-dihydroxyphenylalanine (l-DOPA) is used to demonstrate its electrical discrimination from dopamine (DA) despite their similar chemical structures using DA–Ap nanofilter-coated Au ...

In this paper, the preparation of a potentiometric strip for pH monitoring in saliva samples is reported. The potentiometric strip consists of a solid contact pH-selective and of a solidcontact ionogel reference electrode prepared on a dual screen printed substrate. The screen printing protocols, i.e., type of inks and number of deposits, were adjusted to relatively improve the batch reproducib...

The preparation and potentiometric pH response properties of membranes formulated with various aminated-poly(vinyl chloride) (PVC-NH2) products are described. Products containing secondary and/or primary amino functional groups are obtained by modifying PVC with monoand/or diamines, respectively. Blank membranes prepared with either type of aminated-polymer exhibit nearly Nernstian potentiometr...

2-amino-n-benzthioazolyl benzamide (abtb) was synthesized, characterized and used for thefabrication of a potentiometric sensor for cu2+ metal ions. the electrode exhibits linear response to cu(ii) over a wide concentration range (4.79×10 -8 – 1.85×10 -1 m) with nernstian slope of 30 ± 1.5 mvper decade. the electrode can be used in the ph range from 2 to 9. it has a fast response time of about1...

The commercially available equipment for potentiometric stripping analysis (PSA) was tested for routine lead and cadmium determination in whole-blood samples. In contrast to anodic stripping voltammetry, PSA is not subject to background interferences from organic electroactive constituents in the sample or to the presence of dissolved oxygen (i.e., oxygen removal is not necessary). To determine...

Current fundamental researches in the field of potentiometry demonstrate perspectives using polymeric nanostructured materials as ion-to-electron transducers Solid-Contact Potentiometric Sensors (SCSs). This paper reports preparation and comparative study plasticized Poly(Vinyl Chloride) (PVC) membranes modified with fullerene C60, single-walled carbon nanotubes SWCNTs, multiwalled nanotubes, g...

A new polyvinyl choloride (PVC) membrane sensor for cerium (III) was prepared based on 4,13-didecyl-1,7,10,16-tetraoxa-4,13-diazacyclooctadecane (kryptofix22DD) as an ionophore. The sensor exhibites a linear concentration range of 1.0×10-6to 1.0×10-1M, with a Nernstian slope of 18.0±1.0 mV/decade, and a detection limit of 9.7×10-7M. It has a fast response time (5 s) and can be used for two mont...

We present and validate an equilibrium model based on the Poisson-Boltzmann equations that includes main ingredients to simulate ion-sensitive membranes in context of electrochemical potentiometric sensors with without ionophores. With respect phase boundary models, our spatial resolution electrostatic potential concentrations. The enables study Nernstian non-Nernstian responses, helps improvin...