Potentiometric propranolol-selective sensor based on molecularly imprinted polymer.

A novel potentiometric sensor based on molecularly imprinted polymer (MIP) for propranolol, an adrenergic-blocking drug, was designed. The influence of molecularly imprinted polymer particle content and sodium tetraphenylborate additives in polyvinylchloride membrane was shown. The electrodes show near-Nernstian responses down to 10(-4)-10(-5) M propranolol concentration.

Potentiometric membrane sensors for polyvinylpyrrolidone determination.

Potentiometric sensors were developed for determining the concentration of the physiologically active polymer polyvinylpyrrolidone (PVP) with the use of its adduct with triphenylmethane and azodyes as electrode-active substances in plasticized membranes. The influences of electrolyte and pH of standard solutions on the electrode characteristics were determined. Polyvinylpyrrolidone determination in aqueous solutions of drug compounds, biological fluids and sewage was offered.

Spectrophotometric determination of molybdenum with Alizarin Red S in the presence of poly(sulfonylpiperidinylmethylene hydroxide).

The present work describes a selective and rapid method for the determination of molybdenum with Alizarin Red S (ARS) in the presence of a water soluble polymer, poly(sulfonylpiperidinylmethylene hydroxide) (PSPMH). The ARS modified by PSPMH reacts with molybdenum(VI) in the solutions of pH 3.4-4.