The instability of the current through the solution. Cell with gold washed electrodes and polarization 80 mV (washed with sulfonitric solution). Temperature : 22°C, L-glutamic acid, saturated solution with crystals on the bottom: pH 2.89. B: 40 μT, Bo : 40 nT, Sweep time: 100 sec, Total data current recorded :100 sec, Initial current : 62,5 nA. Final current : 33 nA, Scan rate :100 point/sec, Peak resonance frequency 3,937 Hz. The abscissa: the time. The ordinate: the current through the amino acid aqueous solution.