The melt blown fabric has the
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And then, we are the direct nonwoven fabric making machine manufacturer and exporter. We have over 20 years experience of designing, manufacturing, installing, and debugging PP nonwoven machinery series. The technicians in our company has rich experience and the founder of our company used to be the technician of PP nonwoven machine with over 30 years' experience. Under this condition, the quality of PP nonwoven machines produced by us are guaranteed.
With strong technical support, the products produced by our machines are highly breathable, flexible, lightweight, non-burning, easy to decompose, non-toxic, non-irritating, etc.
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Accurately weigh a certain amount of soybean sample (prepared according to SN/T0800.1 standard, decompose the protein with sulfuric acid in the presence of a catalyst, measure the nitrogen content with an automatic Kjeldahl determination instrument, multiplied by the corresponding nitrogen and protein conversion factor That is, the crude protein content.The uncertainty comes from the reading deviation and some other accidental changes, including random effects of mass, random effects of volume, sample non-uniformity, and random effects during the test.The uncertainty comes from the balance Resolution, tolerance and temperature error of the glass container, calibration of the nitrogen determination system, chemical purity, and atomic weight uncertainty.
Through the automatic Kjeldahl determination, it was found that the uncertainty evaluation method for the determination of crude protein content in soybeans was assessed using the inter-laboratory collaborative test r-value, and indirect assessment of the system effect by the recovery test. Hydrochloric acid standard solution titration volume uncertainty component, has strong practicality and operability, suitable for crude protein analysis of food, feed, oil.
Analysis of Uncertainty in Analyzing Crude Protein in Soybean by Automatic Kjeldahl Analyzer
Crude protein content is an important indicator of grain, feed, and oil. The accuracy of the measurement often affects its trade benefits. With the ever-increasing imports of soybeans and barley in recent years, this influence has become increasingly important. The Kjeldahl method is a standard method for the determination of crude protein in imported and exported oils. The laboratory tries to quantify the quality of the measurement results and determine the credibility of the measurement results by evaluating and calculating the uncertainty. The application of the automatic Kjeldahl nitrogen analyzer is also an important instrument in the determination of crude protein content. It is a very important scientific research instrument for modern research and experiments.