长白山人参冰点温度的测定及其与主要理化指标的相关性分析

Determination of freezing point temperature of Changbai Mountain Panax ginseng and its correlation with main physicochemical indexes

中文关键词:  长白山人参  冰点温度  近冰温储藏  水分含量  总糖含量  可溶性蛋白质含量

英文关键词:Changbai Mountain Panax ginseng  freezing point temperature  near-freezing temperature storage  moisture content  total sugar content  soluble protein content

中文摘要:

      目的 测定新鲜长白山人参的冰点温度, 探讨检测方法的差异性和影响冰点温度的因素。方法 采用差示扫描量热法和冻结法对长白山鲜参的冰点温度进行测定及分析。同时检测了鲜参的水分含量、总糖含量和可溶性蛋白质含量等理化指标, 分析了鲜参的冰点温度与其主要理化指标之间的相关性。结果 应用这两种方法测定的人参冰点温度范围为–4.89~–2.94 ℃, 两种方法的测定结果无显著性差异(P>0.05)。应用这两种方法测得的长白山人参须根的冰点均高于其对应人参主根的冰点0.19~0.69 ℃, 人参的冰点温度与其水分含量、可溶性蛋白质含量呈正相关, 相关性达到了显著性水平(P<0.05), 但是人参的冰点温度与总糖含量呈负相关。结论 应用差示扫描量热法和冻结法可以准确测量人参的冰点温度, 为人参类农特产品的近冰温储藏提供了一定的理论依据和参考。

英文摘要:

      Objective To determine the freezing point of fresh Panax ginseng from Changbai Mountain, and explore the difference of freezing point detection methods and influencing factors. Methods The freezing temperature of fresh Panax ginseng from Changbai Mountain was measured and analyzed by differential scanning calorimetry and freezing method. Meanwhile, the physicochemical indexes such as water content, total sugar content and soluble protein content of fresh reference were detected, and the correlation between the freezing point temperature of fresh reference and its main physicochemical indexes was analyzed. Results The freezing point temperature of Panax ginseng measured by these 2 kinds of methods ranged from –4.89 to –2.94 ℃, and there was no significant difference between the 2 kinds of methods (P>0.05). The freezing point of Panax ginseng fibrous roots in Changbai Mountain measured by these two methods was 0.19–0.69 ℃ higher than that of its corresponding ginseng taproot. The freezing temperature of Panax ginseng positively correlated with moisture content and soluble protein content (P<0.05), but negatively correlated with total sugar content. Conclusion The freezing point of Panax ginseng can be measured accurately by differential scanning calorimetry and freezing method, which provides some reference and theoretical basis for the near-freezing temperature storage of Panax ginseng agricultural products.