RU2002122145A - The method for determining the dielectric parameters of water and its solutions in the low-frequency region using an L-cell - Google Patents

Claims (1)

The method for determining the dielectric parameters of water and its solutions in the frequency range 10 kHz-100 MHz using a set of solenoidal inductors of the same size (L-cells) connected to the oscillatory circuit of the meter, characterized in that the object under study with specific conductivity χ <χ _before. = 20 mS / cm is introduced into L-cells with an intrinsic capacitance C ₀ <10 pF in a dielectric vessel so that the gap between the object and the winding of the measuring cell is 4-6 mm, the length l and radius r of the winding of L-cells satisfy the condition l / r≥7, r≅20 mm, and the maximum possible magnitude of the vortex electric field strength inside the cells is maintained within 5-300 μV / cm; this implements the inductive principle of the L-cells due to the occurrence of bias currents inside the object under study, depending on the dielectric parameters of the object; in this case, the value of the tangent of the dielectric loss angle of the object is calculated by the ratio

where Q ₁ ; C ₁ ; Q ₂ ; C ₂ are the quality factors and capacitance of the oscillatory circuit of the meter in resonance before and after the liquid is placed inside the L-cell, and the dielectric constant is characterized by ε _rel = ΔC / ΔC∞, where ΔС and ΔС∞ are the shift of the resonant capacitance of the oscillator circuit of the meter after the study object at a measurement frequency and at a frequency of the order of 10 MHz.