Nitrogen is a substance that is widely found in nature. In foods, nitrogen is usually introduced into the human body as a protein. Therefore, the determination of nitrogen content is of great significance for food testing, agricultural product testing, and agricultural environmental testing. As an important instrument for determining nitrogen content in samples, instrumentation is widely used in quality supervision, commodity inspection, and disease control centers.
With the development of society and advancement of science and technology, the nitrogen determination instrument has been developed to a fully automated stage, achieving the integration of distillation titration, effectively reducing the error of human factors. There are many industries involved in nitrogen determination instruments, including food, beverages, feed, grain and oil, dairy products, soil, fertilizers, fertilizers, livestock, agricultural food, sewage treatment, and biopharmaceuticals. With the further expansion of their usage, there are some problems. After starting the image, for example, during the use of the nitrogen determination instrument, users have found that the recovery rate of the nitrogen determination instrument is always low. After analysis by professional and technical personnel, we found that the main reasons for this are the following points.
1. The concentration of hydrochloric acid standard solution is too high, less than one drop is not neutral. More than one drop is too much.
2. The condensing tube or splash tube of the distillation apparatus of the nitrogen determination apparatus has been damaged, and the generated ammonia leaks.
3. The receiver fluid is too low to fail the receiver outlet.
When users encounter low nitrogen recovery rate, they can perform analysis and treatment according to the above reasons. Through improvement, the determination effect of nitrogen determination instrument can be effectively improved, and the authenticity, accuracy and effectiveness of the measurement results can be guaranteed. . However, in a sense, the quality of the nitrogen determination instruments should be the most important factor in determining the experimental results. Nowadays, there are many brands and models of the nitrogen determination instruments on the market, and some instrument products are in terms of quality. It is still technically unsatisfactory. If such a nitrogen determination instrument is used for measurement, it will undoubtedly seriously affect the development of the experimental work. Therefore, when selecting a nitrogen determination instrument, companies or research organizations should select strong companies to cooperate and ensure that Nitrogen analyzer product quality.
Precipitated Calcium Carbonate
Uses: Can be used as filler in rubber, plastics, paper, paint and ink industries. Widely used in organic synthesis, metallurgy, glass and asbestos production. It can also be used as a medium seeding agent for industrial waste water, a antacid for stomach and duodenal ulcers, a detoxifying agent for acidosis, a SOâ‚‚ eliminating agent in SOâ‚‚-containing exhaust gas, a dairy cattle feed additive and an anti-sticking agent for oil felt . It can also be used as a raw material for tooth powder, toothpaste and other cosmetics.
Usually used as a filler, widely used in daily chemical industries such as artificial floor tiles, rubber, plastics, papermaking, coatings, paints, inks, cables, construction supplies, food, medicine, textiles, feed, toothpaste, etc., as a filler to increase products The volume is reduced, and the production cost is reduced.
Light Calcium Carbonate is made of limestone, and can be used in daily chemical products such as tooth powder, toothpaste, cosmetics, etc. It can also be used in organic synthesis, metallurgy, glass and asbestos production.
The particle size of light calcium is smaller than that of Heavy Calcium Carbonate, the oil absorption is larger than that of heavy calcium carbonate, and the price is higher than that of heavy calcium carbonate. They are all commonly used fillers in latex paint, and they are best used together. Light calcium is better in terms of sedimentation, but its oil absorption is greater than that of heavy calcium, and the price is generally more expensive than heavy calcium. Although it is not as stable as heavy calcium, it is stable. Even for exterior wall paint, its application amount is also very large. of.
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