The origin of the azotizer

The origin of the azotizer

Kjeldahl is mainly composed of two parts: digester and distiller. The digester mainly digests the sample, while the distiller is mainly distilled. The distiller is a device for separating substances by distillation. In ancient times, distiller was often used in the practice of alchemy, shochu, etc. in addition to chemical analysis in the laboratory. It is a method for extracting substances widely. .

The original distiller is mainly used for alchemy. From the beginning of the low-temperature oxidation roasting method to the closed mercury pumping method in the Eastern Han Dynasty, the most primitive distiller has been formed. It seals the container and heats it. At this point, the mercury vapor decomposed from the sand is condensed on the inner wall of the container. This device, together with the condensing device and the mercury collector, constitutes the initial distiller. Later, with the progress of society, distiller is also undergoing changes. A copper distiller appeared in the Han dynasty and was composed of two parts: the bottom of the upper body with u, and the one cast near the u on the bottom. A drainage tube was cast in the bottom of the tank and communicated with the outside. During the distillation, the steam condenses on the crucible along the rim. Under turbulent flow, after being collected in the tank, the drainage tube is left outside the device so that distillation can be performed. Still later, there was a long copper distiller.

As people's demand for distiller becomes higher and higher, distiller has also undergone earth-shaking changes with people's wishes. Now, the distiller has become more simple and easy to use than the complex equipment of the original alchemy and winemaking. The nitrogen determination instrument distiller eliminates such complicated equipment by simply placing the sample in the tube of the instrument and opening the instrument to perform distillation. The distiller at this time, both appearance and function, has been far away from the ancient distiller.