Nuclear Magnetic Resonance Food Agricultural Imaging Analyzer At present, the most widely studied is the nuclear magnetic resonance food agricultural imaging analyzer with hydrogen nucleus as the object of study. The moisture in food provides the basic conditions for the application of agricultural agricultural imaging analyzer in food. As early as 1950, the United States began to use the nuclear magnetic resonance food agricultural imaging analyzer used to study the hydration of food.
At present, the traditional method of researching water can not detect the flow of water and the distribution of food in food, while the nuclear magnetic resonance food agricultural imaging analyzer is an effective method to study the diffusion of the method can be used in the food system Water, fat or sugar and other molecules in the study, these molecules in various types of food and often carry important information: structural information, the environment where the elements of information and in the processing, storage, internal changes in information. The non-destructive testing of agricultural agricultural imaging analyzer has obvious advantages in its application to food science. Now, the nuclear magnetic resonance food agricultural imaging analyzer has been successfully applied in food science research, food industry quality monitoring system and so on.
Food & Agriculture NMR MRI solution:
1. Measure the water content in food and biological systems
Many foods in the processing process need to frequently measure the moisture content of raw materials and products. In order to meet the moisture content of raw materials or products, Food & Agriculture NMR MRI the moisture analysis method must be able to arrive at the correct analysis results within the time specified in the process and quality control plan. In addition, the automatic operation of the technology in the processing and storage process to continuously detect the water content of raw materials and products.
Food & Agriculture NMR MRI Principles of nuclear power:
The proton relaxation behavior of water protons is different from that of carbohydrates, fats and proteins. T2 relaxation techniques are often used to detect proton strength in food. Food & Agriculture NMR MRI It can be found that in most foods, protons of water, carbohydrates or proteins often have different T2s, so they can be detected by differences in water protons and carbohydrates and protons T2 in proteins.
2 Study the distribution of water and the flow of water
Food raw materials and products in the processing, storage and transportation process, the internal moisture content and distribution of the state will often change, which is leading to the stability of raw materials, product quality reduction one of the main reasons. Food & Agriculture NMR MRI If you can take the appropriate way to control the movement of water in food, to improve product stability, predict the shelf life of the product will provide a strong guarantee.
In the food system, the water is basically in the "combination of water" and "free water" in two forms. The relaxation time of IR and CPMG in nuclear magnetic resonance can reflect the morphological characteristics of water in food system. The degree of binding of water to some hydrophilic substances in the foodstuff can be known by the NMR technique to determine the hydrogen nucleus spin-lattice relaxation time T1 and the spin-spin relaxation time T2, which can reflect the water mobility. Furthermore, through the principle of nuclear magnetic resonance imaging to intuitively reflect the changes in the internal structure of food during processing.
In food and biological tissues, the T2 relaxation time distribution of protons can indicate the number of groups of water molecules present in the food. Food & Agriculture NMR MRI The shorter the relaxation time, the closer the water molecules are to the substrate, the longer the relaxation time. The more freedom. In general, T2 relaxation time can be divided into T21, T22, T23, respectively, corresponding to the food in the combined water, easy flow of water, free water. So the relaxation time can indirectly indicate the degree of freedom of water, which can be used to study the water content of nuclear water samples of food distribution and flow. Inversion software can be used to obtain the integral area of different intervals, indicating the relative content of hydrogen protons in each interval. In the dairy study, NMR can not only measure the water holding capacity, the state of water binding, but also the gel structure.