Interaction of Calf Thymus DNA with the Ni(II) Complex of Sodium 1,4-Dihydroxy-9,10-Anthraquinone-2-Sulphonate: A Novel Method of Analysis Using Cyclic Voltammetry

Figure 1

Cyclic voltammogram of 23.806×10⁻⁶ mol dm⁻³ Na₂[Ni(NaLH)₂Cl₂] · 2H₂O in Hepes buffer at pH 7.4 containing 0.500 mol dm⁻³ NaCl. Electrode: glassy carbon of surface area 0.1256 cm²; scan rate = 0.200 V/s, 25°C. Inset: typical plot of cathodic peak current versus square root of scan rate for the one-electron reduction of Na₂[Ni(NaLH)₂Cl₂] · 2H₂O in Hepes buffer at pH 7.4.