The necessity of measuring the radioactivity of the ²³⁰Тh nuclide arises when attempting to solve a number of geochemical or geochronological problems based on the effects of radioactive disequilibrium in the ²³⁸U series. It is the authors’ opinion that the use of the traditional α- and β-emitters of thorium as a radiotracer in order to determine the activity of ²³⁰Тh leads to various inconveniences and difficulties of a technical nature. The authors recommend using the ²³⁴Тh isotope contained in the study sample as the simplest and most natural way of measuring the chemical yield of the targeted nuclide (²³⁰Тh). A sequence of radio-analytical procedures is proposed that will provide a correct assessment of the radioactivity of ²³⁰Тh. In addition, a specific example and an evaluation of the accuracy of the proposed methodology are presented, using actual experimental data.