Application range, characteristics and functions of nitrogen determination instrument

The nitrogen analyzer is an instrument that calculates the protein content by measuring the nitrogen content in a sample based on the principle of a constant nitrogen content in the protein. Because of its protein content measurement method is called Kjeldahl method, it is called Kjeldahl, also known as protein analyzer, crude protein analyzer. The instrument is also widely used in food factories, drinking water plants, drug inspections, and fertilizer assays.

The scope of application of nitrogen determination instrument:

Nitrogen determination instrument is used to measure organic matter, which is generally N content in food, feed, fertilizer, soil and other materials, and then calculate and convert the protein content in it (because the content of N element in protein is a certain proportion, If you know the N content, you can also calculate the protein content). The detection methods are Kez-N fixed and Dumas-N fixed. The principle of the Kjeldahl method is to use the acid-base neutralization titration method to calculate the N element content based on the consumption of alkali. Dumas' method of determining nitrogen is to burn the sample, convert the N element to N gas, and measure the gas concentration to determine the N element content. At present, both methods have national standards. Nitrogen determination instruments are also commonly used instruments in food and agricultural laboratories.

Nitrogen determination and its features:

1, using three independent quantitative pump to achieve automatic acid, alkali, distillation, without contact with reagents.

2. High-precision electronic weighing system: The net weight of the sample solution is directly weighed after deducting the weight of the titration cup. Compared with the traditional mechanical weighing total weight method, the weight of the titration collecting cup is completely avoided. The weighing error has greatly improved the accuracy and reliability of weighing.

3, anti-corrosion, anti-crystallization wash pipe function: For the instrument in use, the most likely pipeline corrosion and crystallization phenomenon, after the instrument is used, just open the cleaning switch, you can easily clean the pipeline to Prevent the corrosion of the instrument pipeline and the crystallization of alkaline solution.

4, waste collection tray can be easily disassembled, easy to clean, prevent waste liquid corrosion and pollution of the instrument.

5, the instrument case using Teflon acid treatment, anti-corrosive materials, all-round considerations, making the instrument durable.

6, multiple automatic safety protection measures to ensure the normal operation of the instrument:

Cooling water protection: When the instrument is running, tap water will be cut off or stopped, and the instrument will automatically stop running to prevent uncooled steam from splashing and hurting people.

Distiller water shortage protection: The distiller has automatic replenishment function. When the bucket supplying the distiller is lack of water, the distiller automatically stops running to prevent the distiller from being dry and burned.

Safety gate protection: Corrosion-resistant transparent safety gates allow observation of the entire distillation process. During operation, if the safety door is not closed, the instrument will lock the operation key to provide safety protection.

Titration cup collection or overweight protection: When the instrument is running, if the titration collection cup is not on the tray or the solution in the cup is full or overweight, the instrument will automatically recognize it to prevent accidental acid addition and misdistillation.