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首页> 外文期刊>International Dairy Journal >Determination of water droplet size distribution in butter: pulsed field gradient NMR in comparison with confocal scanning laser microscopy.
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Determination of water droplet size distribution in butter: pulsed field gradient NMR in comparison with confocal scanning laser microscopy.

机译：测定黄油中水滴尺寸的分布：与共聚焦扫描激光显微镜比较，脉冲场梯度NMR。

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摘要

The size of the water droplets in butter determines its microbial stability and sensorial properties. In this work, two techniques to determine the water droplet size distribution in butter were compared, namely confocal scanning laser microscopy (CSLM) and pulsed field gradient nuclear magnetic resonance (pfg-NMR). Six commercial butters from different manufacturers were studied. CSLM proved to be a good method to obtain visual information on the microstructure of the butter, but its limited resolution makes it less suitable for the accurate determination of droplet size distributions containing an important fraction of submicron particles. pfg-NMR gives no visual information, but sample preparation, measurement and data analysis are less time consuming. This method yields reproducible quantitative information. However, the accuracy depends on the correctness of the assumptions made. For all samples, except the one containing the biggest droplets, significantly different results were obtained by both techniques.
机译：黄油中水滴的大小决定了其微生物稳定性和感官特性。在这项工作中，比较了确定黄油中水滴尺寸分布的两种技术，即共聚焦扫描激光显微镜（CSLM）和脉冲场梯度核磁共振（pfg-NMR）。研究了六种来自不同制造商的商业黄油。 CSLM被证明是获得有关黄油微观结构的视觉信息的一种好方法，但是其有限的分辨率使其不适用于准确测定包含重要部分亚微米颗粒的液滴尺寸分布。 pfg-NMR没有提供可视信息，但是样品制备，测量和数据分析的时间较少。该方法产生可重现的定量信息。但是，准确性取决于所做假设的正确性。对于所有样品，除了包含最大液滴的样品外，两种技术均获得了明显不同的结果。

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