Crop growth requires nutrient supply of various nutrients such as nitrogen, phosphorus, and potassium. Among them, nitrogen fertilizer is an indispensable fertilizer for photosynthesis of plants. Therefore, the use of an automatic Kjeldahl determination of nitrogen in fertilizers is an important part of fertilizer production.
Nitrogen is one of the main elements that make up the plant components. Among various fertilizer nutrient used, it has the greatest impact on plant growth. As one of the most important indicators to measure product quality, the total amount of chemical fertilizer must be strictly monitored. The nitrogen content in chemical fertilizers is generally greater than the nitrogen content in foods. The capacity of the receiving bottle designed by the automatic Kjeldahl tester and the amount of boric acid added have a certain limit, but when the amount of chemical fertilizers is moderate, the error can be reduced to determine the chemical fertilizer. The nitrogen content of the sample and the concentration of the hydrochloric acid standard solution. In accordance with the current national standard method and the improved method, the compound fertilizer digested by the national standard method is used to determine the total nitrogen content of fertilizers digested according to the semi-micro nitrogen fixed nitrogen and the improved digestion method. The results show that the improved digestion method samples are used. The total nitrogen content in the fertilizer was determined. The test results were very repeatable. The errors in parallel determination were far less than the allowable differences in the current national standards for compound fertilizers, and they were in good agreement with the results of the current national standard method.
The Kjeldahl automatic analyzer simplifies the determination of protein or total nitrogen content, shortens analysis time, and increases work efficiency. Easy to operate, short time, reagent-saving, precise and reproducible are all suitable digestion methods.
Nitrogen is one of the main elements that make up the plant components. Among various fertilizer nutrient used, it has the greatest impact on plant growth. As one of the most important indicators to measure product quality, the total amount of chemical fertilizer must be strictly monitored. The nitrogen content in chemical fertilizers is generally greater than the nitrogen content in foods. The capacity of the receiving bottle designed by the automatic Kjeldahl tester and the amount of boric acid added have a certain limit, but when the amount of chemical fertilizers is moderate, the error can be reduced to determine the chemical fertilizer. The nitrogen content of the sample and the concentration of the hydrochloric acid standard solution. In accordance with the current national standard method and the improved method, the compound fertilizer digested by the national standard method is used to determine the total nitrogen content of fertilizers digested according to the semi-micro nitrogen fixed nitrogen and the improved digestion method. The results show that the improved digestion method samples are used. The total nitrogen content in the fertilizer was determined. The test results were very repeatable. The errors in parallel determination were far less than the allowable differences in the current national standards for compound fertilizers, and they were in good agreement with the results of the current national standard method.
The Kjeldahl automatic analyzer simplifies the determination of protein or total nitrogen content, shortens analysis time, and increases work efficiency. Easy to operate, short time, reagent-saving, precise and reproducible are all suitable digestion methods.
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