Complexation of Copper(II) with Humic Acids Studied by Ultrasound Spectrometry

<table>The change of ultrasound attenuation in dependence of concentration of humic acid (white columns for 8220 kHz and black columns for 12 200 kHz).</table>

Organic Chemistry International

fig4

Figure 4

Figure 4: Complexation of Copper(II) with Humic Acids Studied by Ultrasound Spectrometry 