# Construction of the Stand and Experimental Studies of the Iontophoresis Process
## 5 Analysis of Test Results
The functional dependencies between the resistance values \(R\) of the solutions and the temperature \(T\) of the electrolyte are best described by the second-degree curves shown in the diagrams. Certain similarities can be observed for graphs (b), (c) and (d) (Figure 8); the resistance \(R\) of the electrolyte in the temperature range \(T\) of 26-34 \({}^{\circ}\)C decreases, reaching a minimum extreme of about 34 \({}^{\circ}\)C, then increases. The course of the graph (a) differs from the other graphs in terms of temperature \(T\) of the solution at 26-33 \({}^{\circ}\)C; the resistance \(R\) of the solution increases, reaching a maximum extreme of about 33 \({}^{\circ}\)C \(T\) of the solution, then decreases. The maximum value of the electrolyte resistance \(R\) is approximately equal to  
\begin{table}
\begin{tabular}{c c c c c c c} \hline  & & & \multicolumn{4}{c}{**Resistance \(R\) of the Solution [k\(\Omega\)]**} \\ \cline{4-7}
**Solution No. ** & **Voltage \(U\) [V]** & \multicolumn{4}{c}{**Temperature \(T\) of the Solution [\({}^{\circ}\)C]**} \\ \cline{3-7}  & & **26** & **30** & **35** & **38** & **40** \\ \hline
1 & & & 0.474 & 0.426 & 0.448 & 0.476 & 0.420 \\
2 &  
= 3 k\(\Omega\) and the minimum \(R\) = 0.08 k\(\Omega\). From the conducted test, it appears that a voltage \(U\) on the electrolyte supply above 1 V only causes an increased movement of electrons in the solution. The increased movement of electrons contributes to an increase in the intensity \(I_{p}\) of the solution, enabling increased permeability of medicinal substances through the skin. Figure 10 presents the influence of the temperature \(T\) of solution no. 4 on the current resistance \(R\) of the electrolyte. The regression analysis showed a dependency between the resistance \(R\) and the temperature \(T\) of the solution. This dependency is described by a quadratic function, which is shown in the graphs. It was found that, for case (a) in the temperature range \(T\) of the solution 26-32 \({}^{\circ}\)C, the resistance \(R\) of the electrolyte increases, reaching a maximal extreme for the temperature \(T\) of the solution. However, as the temperature \(T\) of the solution increases in the range of values 32-40 \({}^{\circ}\)C, the resistance \(R\) of the solution decreases. It has been observed that, for cases (b) and (c) in the temperature range \(T\) of the electrolyte 26-36 \({}^{\circ}\)C, the resistance \(R\) of the electrolyte decreases. In the temperature range \(T\) of the solution, 36-40 \({}^{\circ}\)C, the resistance \(R\) of the electrolyte increases. Therefore, there is an extreme minimum at a solution temperature \(T\) of approx. 36 \({}^{\circ}\)C. In contrast, in case (d), it was observed that, with an increase in solution temperature \(T\) in the range from 26 to 34 \({}^{\circ}\)C, the electrolyte resistance \(R\) decreases, reaching an extreme minimum at an electrolyte temperature \(T\) of approx. 34 \({}^{\circ}\)C, and then the resistance \(R\) increases. The maximum value of the electrolyte resistance was shown to be approximately equal to \(R\) = 24 k\(\Omega\) and the minimum \(R\) = 0.18 k\(\Omega\). From the conducted test, it appears that a voltage \(U\) on the electrolyte supply above 1 V only causes increased movement of electrons in the solution. Figure 9: Influence of the temperature \(T\) of solution no. 2 on the current resistance \(R\) of the electrolyte for: (**a**) power supply voltage \(U\) = 1 V, (**b**) power supply voltage \(U\) = 3 V, (**c**) power supply voltage \(U\) = 5 V, (**d**) power supply voltage \(U\) = 10 V.  
Increased movement of electrons contributes to an increase in the electrical conductivity of the electrolyte. Figure 11 presents the influence of the temperature \(T\) of solution no. 6 on the current resistance \(R\) of the electrolyte. The increase in the resistance \(R\) of electrolytes in relation to the temperature \(T\) of the solution is not proportional.