What are the quantitative methods for measuring crude fat?
Fat is present in samples such as grain and feed. The fat content is one of the important indicators affecting the quality and nutritional value of these products. Therefore, it is more and more important to carry out fat determination and quantitatively measure the fat content in foodstuffs. So what are the quantitative methods for measuring crude fat?
The quantitative determination methods of crude fat mainly include Soxhlet extraction method (now developed into a fat analyzer ), acid hydrolysis method, etc., and the use of a fat analyzer to quantitatively determine the crude fat content of a sample is one of the more commonly used methods. It is based on Soxhlet extraction, the principle is gravimetric method, the fat is put out after weighing with fat solvent, the method is suitable for solid and liquid samples. The acid hydrolysis method is to extract the sample by acid hydrolysis and then extract it with diethyl ether to remove the solvent to obtain the total amount of free and bound fat.
Regardless of the measurement method, the fat is insoluble in water, and the characteristics of the organic solvent are easily extracted and then measured. In general, the quantitative determination steps of crude fat can be mainly divided into sample preparation, extraction, weighing and calculation. If the traditional method is used, the operation process is more complicated, and the safety is not good. Therefore, in order to improve the accuracy and efficiency of quantitative determination of crude fat, reduce the pressure of the measuring personnel, and improve safety, a fat measuring instrument based on Soxhlet extraction method was born.
Traditional manual methods are time-consuming and labor-intensive, and analysts are more exposed to reagents. The results sometimes vary from person to person. The fat analyzer provides a safe and reliable method for the quantitative determination of crude fat. The instrument not only retains the classical method of Soxhlet extraction, but also exerts the advantages of fast, accurate and high-quality instruments. It is applied to the detection of food and feed fat, which greatly improves the work effect and expands the detection. The scope has played an important role in improving the quality and safety of food and feed.
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