Pedersen H T, Ablett S, Martin D R, Mallett M J D, Engelsen S B
Centre for Advanced Food Studies, Department of Dairy and Food Science, Food, Technology, The Royal Veterinary and Agricultural University, 1958, Frederiksberg C, Denmark.
J Magn Reson. 2003 Nov;165(1):49-58. doi: 10.1016/s1090-7807(03)00243-x.
The application of the NMR-MObile Universal Surface Explorer (NMR-MOUSE) to study food systems is evaluated using oil-in-water emulsions, and the results are compared to those obtained using a conventional low-field NMR (LF-NMR) instrument. The NMR-MOUSE is a small and portable LF-NMR system with a one-sided magnet layout that is used to replace the conventional magnet and probe on a LF-NMR instrument. The high magnetic field gradients associated with the one-sided MOUSE magnet result in NMR signal decays being dominated by molecular diffusion effects, which makes it possible to discriminate between the NMR signals from oil and water. Different data acquisition parameters as well as different approaches to the analysis of the NMR data from a range of oil-in-water emulsions are evaluated, and it is demonstrated how the concentration of oil and water can be determined from the NMR-MOUSE signals. From these model systems it is concluded that the NMR-MOUSE has good potential for the quantitative analysis of intact food products.
利用水包油乳液评估了核磁共振移动通用表面探测器（NMR-MOUSE）在食品体系研究中的应用，并将结果与使用传统低场核磁共振（LF-NMR）仪器获得的结果进行比较。NMR-MOUSE是一种小型便携式低场核磁共振系统，采用单侧磁体布局，用于替代LF-NMR仪器上的传统磁体和探头。与单侧MOUSE磁体相关的高磁场梯度导致核磁共振信号衰减主要受分子扩散效应影响，这使得能够区分来自油和水的核磁共振信号。评估了一系列水包油乳液的不同数据采集参数以及分析核磁共振数据的不同方法，并展示了如何从NMR-MOUSE信号中确定油和水的浓度。从这些模型系统得出结论，NMR-MOUSE在完整食品定量分析方面具有良好潜力。
