Nitrogen analyzer

proteinlaboratorydistillation

PMP-M digesters are designed for samples mineralization (wet oxidation) to study protein or nitrogen content by the Kjeldahl method in semi-automatic AKV-10 distillation apparatuses. There are several different standards for various products that determine the procedure of Kjeldahl protein analysis; according to these standards, different names can be used for devices with identical functions. Digesters are used in the process of mineralization of samples dissolved in sulfuric acid by heating them in a catalyst. In particular, there are the following definitions of digesters: “electric heaters or gas burners that make it possible to maintain temperatures from +450 °C to +500 °C”, “aluminum block with sockets for test tubes or Kjeldahl flasks”. In any case, the function of this device is relatively simple — it heats Kjeldahl flasks with the product samples, sulfuric acid, catalyst and elements that prevent spraying during boiling, for example, with glass balls. Obviously, at the present stage of laboratory equipment development, the use of standard stoves or, especially, gas burners to heat Kjeldahl flasks is absolutely unacceptable, since the laboratory assistant conducting this procedure is forced to inhale dangerous fumes of sulfuric acid. PMP-M digesters allow group processing of samples with reliable fixation of flasks and removal of fumes, and in addition they minimize the time of mineralization due to rapid heating and the ability to work at the upper limit of the temperature range specified by the standards.