This study aimed to compare the absorbance properties of new and reconditioned cuvettes and ensure no residual solution remained in reconditioned cuvettes. Twelve cuvettes were filled with potassium dichromate solutions at concentrations of 20 mg/L, 120 mg/L, and 600 mg/L, and four cuvettes were filled with Eosin Y solution at a concentration of 10^-4 M. These cuvettes were then reconditioned using our process.

Each solution was tested in duplicate using new and reconditioned cuvettes. Absorbance measurements were taken at 257 nm, 313 nm, 350 nm, 430 nm, and 517 nm, depending on the solution contained in the cuvettes. The absorbance values of the reconditioned cuvettes were directly compared to those of the new cuvettes. Additionally, absorbance was measured in reconditioned cuvettes filled with water to ensure that these measurements were similar to those of new cuvettes filled with water (result shown on the graph bellow).

This experiment allowed us to assess whether there were any detectable residual solutions present in reconditioned cuvettes.