利用低场核磁共振检测分析注水猪肉水分子弛豫特性

Analysis of water relaxation characteristics of water-injected pork by low-field nuclear magnetic resonance

中文关键词:  注水肉  弛豫  水分

英文关键词:water-injected meat  relaxation  moisture

中文摘要:

      目的 运用低场核磁共振(low-field nuclear magnetic resonance, LF-NMR)技术分析样品检测质量及注水比例对水分子弛豫特性的影响。方法 分析不同样品质量(1、2、3、4、5 g)对弛豫时间、峰总面积、峰面积比的影响, 确定最佳样品质量; 通过测定不同注水比例(0%、10%、20%、30%、40%、50%)对猪肉弛豫特性的影响, 分析注水后猪肉中的水分变化。结果 样品质量为3 g时, 弛豫时间、峰面积比的稳定性较好; 随着注水比例的增加, 不易流动水的起峰时间显著增加(P<0.05)、峰面积比显著减小(P<0.05); 而自由水的起峰时间、峰顶点时间、峰面积比均显著增大(P<0.05)。结论 在样品质量为3 g的条件下采样, 有利于获得较为稳定的试验结果; 将不易流动水和自由水的变化规律应用在注水肉检测方面, 可使注水肉的检测更加方便、快捷。

英文摘要:

      Objective To analyze the effects of sample weight and water-injected ratios on the relaxation characteristics of pork by low-field nuclear magnetic resonance (LF-NMR). Methods The optimum sample weight was determined based on the relaxation time, peak area and peak area ratio at different sample weights (1, 2, 3, 4, 5 g). Relaxation characteristics of pork at different ratios (0%, 10%, 20%, 30%, 40%, 50%) of water-injected were measured to explore the moisture changes of water-injected meat. Results The results of relaxation time and peak area ratio showed a good stability when sample weight was 3 g. With the increase of the ratios of water injection, the value of T21 increased (P<0.05), while P21 showed a decrease (P<0.05). In addition, the relaxation time and peak area ratio of free water increased significantly (P<0.05) when the samples were injected more water. Conclusion The results are more stable when sample weight is 3 g. Changes of immobilized water and free water by LF-NMR can be applied to detect the quality of pork, which will shorten the detection time and improve the accuracy of the test.