Time domain NMR (TD-NMR)

Time domain NMR (TD-NMR)

Time domain NMR (TD-NMR) is a magnetic resonance technique based on relaxation time detection. Time domain NMR is generally tested and analyzed by T1 and T2 relaxation time. It is an advanced characterization method, and the test process is fast and non-destructive.

Time domain NMR has been widely used in scientific research and industrial quality control (QA/QC), and its application fields span food, agriculture, material science, petroleum energy, nanomedicine…, such as solid fat content (SFC) testing, seeds containing oil test, fiber oil test, material aging and cross-linking, quantitative test of body fat in living animals, etc.

Compared with the frequency domain NMR analyzer, the time domain NMR analyzer is generally a desktop NMR based on a permanent magnet, and the frequency domain NMR is generally a superconducting magnet.

Time domain NMR is to study the interaction between molecules from the difference of relaxation time, such as molecular mobility; frequency domain NMR is to study the internal structure information of sample molecules from frequency difference.

Applications of time domain NMR:

1. Food quality related: water molecule mobility, water holding capacity, water binding, hydration, etc.

2. Agriculture field: seed oil content, seed moisture content, seed washing process, seed germination.

3. Food and agricultural products processing: drying process research, water migration, water distribution, low-temperature freeze-drying, rice cooking process, taste

4. Material field: polymer aging, crosslinking, soft and hardness research, etc.

5. Industrial fields: solid fat content, fiber oiling rate.

6. Geological energy field: core pore analysis, displacement experiment, freezing and thawing, frozen soil, concrete

…

The characteristics of time domain NMR:

1. Based on permanent magnet technology, low maintenance cost.

2, desktop nuclear magnetic, compact instrument, easy to install.

3. The instrument is easy to operate and can realize automatic operation.

4. Time-domain NMR is generally designed as a single-use function, and there is no requirement for the operator.

5. The permanent magnet material is stable, and the instrument is very durable.

6. The application of time-domain NMR continues to expand, with powerful functions and broad application prospects.

7. The time domain NMR test process is non-destructive, fast, green and pollution-free.