Oil content tester is a high performance, box type design product, and has been widely used in the field of seed oil content test. The product adopts the modular design concept, which can be configured according to the needs of users to meet the actual needs of factory and scientific research. It has been widely used in many fields such as food, agriculture, petrochemical, chemical fiber, energy and building materials, which can meet the requirements of quality management and monitoring in the production process, and can also be used in the research and development of related fields. The product not only has the characteristics of NMR without special sample preparation, nondestructive testing and green environmental protection, but also has excellent measurement accuracy and repeatability, fast analysis speed, simple operation and convenience, and is an ideal high cost performance instrument.
NMR has the advantages of nondestructive testing, one machine multi parameter and the same multi parameter. In designing magnet, the type and structure size of magnet should be determined initially according to experience, then the accurate dimension can be obtained by using finite element method. The assembled magnet can achieve the requirements of the uniformity of the magnet through passive field.
The principle of NMR analysis of oil content tester:
In the static magnetic field, there are different levels in the nucleus with magnetic field. When the electromagnetic wave energy equals the energy level difference, the energy level transition occurs in the absorption electromagnetic wave of the nucleus. The nuclear magnetic resonance is a physical phenomenon of the nucleus in the static magnetic field under the action of another alternating magnetic field, Not all nuclear nuclei can produce this phenomenon, because nuclear energy produces nuclear magnetic resonance because of its spin. In NMR, the process of magnetization returning to equilibrium can be described by spin lattice relaxation time T1 and spin spin relaxation time T2. The difference of NMR spectrum can be seen from the difference of relaxation time. NMR signal is a physical phenomenon of electromagnetic rays emitted, which is proportional to the density of the nucleus. NMR signals are used to reflect the chemical structure, diffusion coefficient, reaction rate, chemical change and other properties of the sample.
