Shanghai Haozhuang Instrument Co., Ltd. develops the KNB nitrogen analyzer of the Hao Zhuang (LNB) brand, which is energy-saving and environmentally friendly, leading the country. Professional manufacturing is more secure and affordable The detection principle of the nitrogen analyzer is (Kjeldahl's principle of nitrogen determination): Protein is an organic compound containing nitrogen. Food and other analytes are heated and digested with sulfuric acid and catalyst to decompose protein, and the decomposed ammonia combines with sulfuric acid to produce ammonium sulfate. Then alkalization distillation frees ammonia, absorbs it with boric acid and then titrates with sulfuric acid or hydrochloric acid standard solution, and multiplies the conversion factor by the acid consumption, which is the protein content. The nitrogen analyzer consists of a digester and a semi-automatic nitrogen analyzer distiller. The digestion furnace (index-explicit type) is detected and controlled by a single-chip microcomputer, and the temperature can be gradient controlled (that is, different temperature values ​​are set at different time periods, and the instrument can be automatically controlled after setting) to make the well-type heating furnace To further achieve perfection, the sample is placed in the digestion tube and inserted into the well-type heating furnace for heating to obtain the best thermal effect, and the catalyst is added before the digestion to further accelerate the digestion and digestion and greatly shorten the digestion time. Harmful gases such as S02 escaping from the digestion tube are brought into the sewer through the exhaust pipe on the digestion tube through the suction tee (it can also be recovered with a vacuum pump and a recovery bottle), which effectively suppresses the escape of harmful gases and omits the experiment A fume hood is installed in the room. Generally, the sample is digested and digested in about 60 minutes, and then it can be completely digested. Door Drapes,Bedroom Door Curtains,Macrame Door Curtain,Macrame Cotton Door Curtain Shandong Guyi Crafts Co.,Ltd , https://www.gyicraft.com