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[Chemical Knowledge]：Reveal the working principle of Kjeldahl nitrogen meter

Read： 419 Time：20months ago Source：Transform the World with Simplicity

Kjeldahl is an instrument used to determine nitrogen compounds in organic or inorganic compounds. It can determine the nitrogen content in the sample through the process of oxidation combustion, leaching and titration, and can be applied to plants, water, sediments and other fields. Next, let's reveal the working principle of the Kjeldahl nitrogen meter. The working principle of the

Kjeldahl nitrogen analyzer is based on the determination of the content of nitrogen compounds in the sample. The instrument can be divided into two parts: the former combustion device and the latter immersion titration device. The specific steps are as follows:

1. The previous combustion device realizes the complete oxidation of nitrogen compounds contained in the sample to nitrogen oxides, including nitrogen compounds in artificial air;

2. The latter immersion titration device can recover completely oxidized nitrogen compounds from the gaseous state and measure the nitrogen content in the gaseous recovery sample by titration. The

Kjeldahl nitrogen analyzer uses an oxidation-reduction method. By boiling the nitrogen in the sample and reducing it, electrons can be released and converted into measurable electrical signals. Thus, the nitrogen content is proportional to the intensity of the electrical signal. The background noise and instrument response time of the Kjeldahl instrument are short, the device is simple, and the batch detection efficiency is high. The advantages of

Kjeldahl nitrogen analyzer are high precision, fast and convenient measurement. However, it also has some disadvantages. Such as: not suitable for all kinds of sample shape and nature analysis; the initial installation and maintenance cost of the instrument is higher, the operation of the experimental requirements are more stringent. The application prospect of

Kjeldahl instrument is very broad. For example, in the field of plant science, it can be used to determine the nitrogen content in plants, providing a basis for breeding work and studying the relationship between nitrogen-fixing bacteria and plants, and in ecological research, it is used to determine the nitrogen content in water and sediment, which provides an extremely important data source for the study of global nitrogen cycle.

Kjeldahl instrument plays an extremely important role in chemical analysis machines, and its determination effect has been widely recognized and has become a universal means of determination. With the continuous improvement of its technology and the continuous expansion of its application range, it is believed that the Kjeldahl nitrogen analyzer will provide useful technical support for scientific research and experiments in more fields.

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