The present disclosure provides a reagent formulation for quantitative estimation of creatinine and urea in biological fluids, wherein the reagent formulation comprises (a) at least one enzyme responsive to at least one analyte of interest, (b) an electron transfer mediator, (c) at least one crystalline polymer, and...

The present disclosure provides an ion-selective membrane for use in electrochemical biosensors for potentiometric measurement of clinically important electrolytes such as potassium ion, sodium ion, chloride ion, calcium ion and pH in biological fluids, wherein the ion-selective membrane can be formed from a membran...