The Kjeldahl operation is an internationally recognized method for determining the amount of nitrogen in a sample. With its help, the properties of chemicals, foodstuffs, soil, sewage, and fertilizer samples can be accurately determined. The first step in this process is known as digestion, during which the sample is exposed to highly concentrated acids. The undeniable risk of this operation has made it difficult to produce devices that perform this process, and that is why products such as digestion tools produced by the laboratory industry complex are particularly important in this field.