Method for testing tobacco water content based on time domain nuclear magnetic resonance inversion peak area
A technology of nuclear magnetic resonance and testing method, which is applied in the direction of using nuclear magnetic resonance for analysis, material analysis through resonance, and measuring devices, etc., can solve problems such as affecting the accuracy of measurement results, inability to distinguish oil and water signals, etc., and achieves fast detection speed and detection. Accurate results and improved accuracy
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[0018] Below in conjunction with embodiment the present invention is described in further detail.
[0019] 1. Experimental materials
[0020] Hebei China Tobacco Industry Co., Ltd. produced three cigarette samples of shredded tobacco A, B, and C.
[0021] 2. Experimental equipment
[0022] PQ-001 nuclear magnetic resonance instrument (magnetic field strength 0.5 T, probe diameter 15mm) and microwave drying system produced by Suzhou Numei Analytical Instrument Co., Ltd.; MS304S electronic balance produced by Mettler-Toledo, Switzerland.
[0023] 3. Experimental steps
[0024] a. Use the standard oil sample to calibrate the PQ-001 nuclear magnetic resonance instrument, adjust the center frequency of the instrument to 21.2945 ~ 21.2946MHz, adjust the pulse width of 90 degrees and 180 degrees, use the FID sequence for calibration, and the number of sampling points is 2048. The interval between them is 2000 ms.
[0025] b. Take A sample 0.5g, 0.7g, 0.9g, 1.1g, 1.3g as the stand...
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