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Alternating current voltammetric determination of DNA damage
D Krznarić1, B Cosović, J Stüber
1Center for Marine Research Zagreb, Ruder Bosković Institute, Yugoslavia.
Chemico-Biological Interactions
|January 1, 1990
Summary
This study optimizes alternating current voltammetry for DNA detection at low concentrations. Inorganic electrolytes and avoiding organic bases improve accuracy and reproducibility for DNA analysis.
Area of Science:
- Electrochemistry
- Biochemistry
- Analytical Chemistry
Background:
- Alternating current (a.c.) voltammetry is explored for DNA determination.
- Low DNA concentrations and alkaline filter elution techniques present challenges.
Purpose of the Study:
- Investigate conditions for a.c. voltammetric DNA determination.
- Optimize the technique for low DNA concentrations and filter elution.
Main Methods:
- Utilized inorganic electrolyte solutions to distinguish DNA peaks.
- Analyzed native DNA (nDNA) and denatured DNA (dDNA) peak characteristics.
- Assessed the impact of sonication and organic bases (ethanolamine) on DNA signals.
Main Results:
- Identified three distinct current peaks for DNA (I, II, III) at different potentials.
- Sonication enhanced nDNA peak current but not dDNA.
- Organic bases like ethanolamine interfered with dDNA detection but could be managed.
Conclusions:
- Optimized a.c. voltammetry provides reproducible DNA determination (±6% at 50-60 ng/ml).
- Avoiding organic bases simplifies the procedure.
- Understanding interactions with filter components is crucial for accurate analysis.