I am measuring the impedance value for single-frequency using a capacitive sensor immersed in a different solution. In the Gamry framework, I select single-frequency EIS to take the measurement for single-frequency. I am taking the measurements for three different solutions: 0 PPM, 500 PPM, 1000 PPM, and 2000 PPM. Every time I get a different sequence of data, there is no repeatability in the sequence. Does anyone know about the Gamry reference 600 and single-frequency EIS? And help me overcome this problem. It would be highly appreciated. Thanks in advance.