23. Solving a chemistry problem

8. When analyzing wastewater for beryllium content, a sample of 100.0 ml was evaporated to 1.00 ml and solutions of acetate buffer solution and dibenzoylmethane were added. After introducing isoamyl alcohol into the solution, the organic phase was separated and the phosphorescence spectrum of the resulting beryllium complex was recorded at liquid nitrogen temperature. In parallel, we prepared the same sample with the introduction of 0.2 μg of beryllium and recorded its phosphorescence spectrum; measured the peak heights for both samples hx=75 mm and hBe -50 mm and obtained the following data: