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Related Concept Videos

Electrodeposition01:08

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Amperometry: Overview01:10

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Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
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Enzyme-Linked Immunosorbent Assay

In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen.  Enzyme-substrate reaction allows the antigen to be visualized or quantified.

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Related Experiment Video

Updated: Jun 26, 2026

Dry Film Photoresist-based Electrochemical Microfluidic Biosensor Platform: Device Fabrication, On-chip Assay Preparation, and System Operation
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[An enzyme electrode biosensor for inosine determination].

Shiqing Sun1, Jianguo Shi, Xuemei Li

  • 1Adrrssed Institute of Biology, Shandong Academy of Sciences, Shandong Key Laboratory for Biosensors, Ji'nan 250014, China sundaiman77@yahoo.com.cn

Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|January 20, 2009
PubMed
Summary
This summary is machine-generated.

A novel enzyme electrode biosensor offers a stable and efficient method for determining inosine in tablets. This rapid, economical biosensor provides accurate results with a long operational lifetime.

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Area of Science:

  • Biotechnology
  • Electrochemistry
  • Biosensors

Context:

  • Inosine determination is crucial for pharmaceutical analysis.
  • Existing methods may lack stability or efficiency.
  • Hydrogen peroxide electrodes offer enhanced stability over oxygen electrodes.

Purpose:

  • To develop a stable and efficient enzyme electrode biosensor for amperometric determination of inosine.
  • To co-immobilize nucleoside phosphorylase and xanthine oxidase on a hydrogen peroxide electrode.

Summary:

  • The developed enzyme electrode biosensor utilizes co-immobilized nucleoside phosphorylase and xanthine oxidase on a hydrogen peroxide electrode.
  • It demonstrates a linear response to inosine (1-268 mg/L) with a 60-second response time and 25 microL sample volume.
  • The biosensor achieved high accuracy (100.8% recovery) and precision (RSD < 0.14%), with a 25-day operational lifetime at 25°C.

Impact:

  • This biosensor offers a specific, rapid, convenient, and economical method for inosine determination in pharmaceutical formulations.
  • It provides a stable and reliable alternative for quality control of inosine tablets.
  • The technology has potential for determining related nucleosides and derivatives.