A Methodology Study on the Optimal Detection of Oil and Moisture Content in Soybeans Using LF-NMR and Its 2D T1-T2 Nuclear Magnetic Technology

Abstract

In this study, we aimed to provide an accurate method for the detection of oil and moisture content in soybeans. Introducing two-dimensional low-field nuclear magnetic resonance (LF-2D-NMR) qualitatively solved the problem of overlapping component signals that one-dimensional (1D) LF-NMR techniques cannot distinguish in soybean detection research. Soxhlet extraction, oven drying, LF-NMR spectrum, and LF-NMR oil and moisture content software were used to detect soybean oil and moisture content. The comparison showed that the LF-NMR oil and moisture content software was faster and more accurate than the other methods. The specific identification of the oil and moisture signals of soybean seeds using longitudinal relaxation time (T1) and transverse relaxation time (T2) successfully solved the problems of less mobile water, overlapping free water, and oil signals. Therefore, LF-2D-NMR can complement conventional LF-NMR assays, and this study provides a new method for the analysis and detection of moisture and oil in soybeans.

Investigation of the soybean infiltration process utilizing low-field nuclear magnetic resonance technology

“…Several techniques are available to study the phenomenon of moisture movement, including specific gravity, cross-section, radiofax, X-ray analysis, and Nuclear Magnetic Resonance (NMR) [12][13][14]. However, specific gravity, cross-section, radiofax, and X-ray analysis techniques are destructive and invasive to varying degrees and do not consistently detect changes in moisture in the sample [15]. The NMR technique, as an emerging analytical test, has achieved great success in the fields of medicine [16], biology [17], and the food industry [18], with advantages such as non-invasiveness, rapidity, and high efficiency.…”

Nondestructive Detection of Sunflower Seed Vigor and Moisture Content Based on Hyperspectral Imaging and Chemometrics

“…These parameters profoundly reveal the physiological condition and vitality of the seeds. Regarding moisture content determination, commonly utilized approaches include distillation methods, drying methods [9], Soxhlet extraction [10], and Karl Fischer titration methods [11]. Although these conventional methods offer visual representations of seed viability and moisture content, they still present several limitations, such as prolonged testing cycles, low efficiency, high costs, cumbersome procedures, and even the potential for physical damage to the seeds.…”