Adsorptive stripping voltammetry of bleomycin

Area of Science:

• Electrochemistry
• Analytical Chemistry
• Biochemistry

Background:

• Bleomycin is a crucial chemotherapy drug.
• Sensitive and accurate detection methods are vital for therapeutic drug monitoring and research.
• Electrochemical techniques offer potential for sensitive biomolecule analysis.

Purpose of the Study:

• To develop and validate a sensitive adsorptive voltammetry method for bleomycin determination.
• To investigate the electrochemical behavior of bleomycin.
• To apply the developed method for bleomycin quantification in biological matrices.

Main Methods:

• Adsorptive voltammetry was employed in 0.05 M H2SO4 solution.
• Two reductive peaks (P1 and P2) were observed and characterized.
• The method was optimized for sensitivity and applied to mouse serum samples.

Main Results:

• Peak P2 exhibited higher sensitivity than P1, with a linear relationship between peak current and bleomycin concentration (1.0 x 10(-9)-1.0 x 10(-7) M).
• A detection limit of 5.0 x 10(-10) M was achieved for bleomycin.
• The reduction process of P1 followed the Frumkin adsorptive isotherm, yielding adsorption parameters.
• P2 was identified as an irreversible adsorption peak with catalytic hydrogen properties.

Conclusions:

• Adsorptive voltammetry provides a highly sensitive method for bleomycin detection.
• The developed electrochemical method is suitable for quantifying bleomycin in complex biological samples like mouse serum.
• Further electrochemical studies can elucidate bleomycin's behavior and aid in developing novel analytical strategies.