Detection of Glucose with Atomic Absorption Spectroscopy by Using Oligonucleotide Functionalized Gold Nanoparticle

Area of Science:

• Biochemistry
• Analytical Chemistry
• Nanotechnology

Background:

• Accurate glucose detection is crucial for diabetes management.
• Existing methods may have limitations in sensitivity or complexity.
• Nanoparticle-based assays offer potential for improved detection.

Purpose of the Study:

• To develop a novel, sensitive method for glucose detection.
• To utilize gold nanoparticles (AuNPs) and atomic absorption spectroscopy (AAS).
• To validate the method's performance in human serum samples.

Main Methods:

• A sandwich assay format using DNA-functionalized probes and AuNPs.
• Separation of bound AuNPs via hybridization and buffer washing.
• Cleavage of DNA by glucose-induced Fenton reaction to release AuNPs.
• Quantification of glucose by measuring gold absorbance using AAS.

Main Results:

• The method demonstrated a linear response to glucose concentration from 50.0 μM to 1.0 mM.
• A low detection limit of 40.0 μM was achieved.
• The assay provided satisfactory results for glucose determination in human serum.

Conclusions:

• The developed AuNP-based AAS method is a sensitive and viable approach for glucose detection.
• This novel assay shows promise for clinical applications, particularly in serum analysis.
• The integration of nanotechnology and spectroscopy offers a powerful platform for biochemical analysis.