运动营养饼干品质指标的主成分分析及聚类分析

Principal component analysis and cluster analysis of quality indexes of sports nutrition biscuits

中文关键词:  运动营养饼干  主成分分析  聚类分析  品质评价

英文关键词:sports nutrition biscuits  principal component analysis  cluster analysis  quality evaluation

中文摘要:

      目的 建立不同品种运动营养饼干品质评价体系, 为运动营养饼干的鉴别和质量控制提供借鉴。 方法 选取9个不同品种运动营养饼干, 对其营养品质和真菌毒素污染等15项指标进行测定, 分析其品质指标的相关性, 利用主成分分析法和聚类分析法对其品质做出综合评价。结果 不同品种运动营养饼干品质指标之间均存在差异性(P<0.05), 且品质指标变异系数各不相同, 表明不同品种饼干品质之间呈现不同程度的变化。由主成分分析结果可知, 15项品质指标反映9种不同运动营养饼干品质指标可以用5个主成分表示, 其累计方差贡献率为88.673%, 其中咀嚼性、Mg、Ca、L*值、b*值、蛋白质、脂肪可作为综合评价其品质优劣的关键性指标。结论 采用主成分分析和聚类分析综合评价方法获得的试验研究结果为消费者选择营养价值高、口感好、品质优良的运动营养饼干品种提供参考依据; 本研究建立的品质评价体系为运动营养饼干的鉴别和质量控制提供借鉴。

英文摘要:

      Objective To establish a quality evaluation system for different varieties of sports nutrition biscuits, and provide references for the identification and quality control of sports nutrition biscuits. Methods Nine different varieties of sports nutrition biscuits were selected as raw materials, and 15 kinds of indicators of their nutritional quality and mycotoxin pollution were measured, and the correlation of their quality indicators was analyzed, and the quality was comprehensively evaluated by principal component analysis and cluster analysis. Results There were differences in the quality indicators of different varieties of sports nutrition biscuits (P<0.05), and the coefficients of variation of the quality indicators were different, indicating that the quality of different varieties of biscuits showed varying degrees of change. It could be seen from the main component analysis that 15 kinds of quality indicators could reflect the quality of 9 kinds of different sports nutrition biscuits, which could be represented by 5 main components, and their cumulative variance contribution rate was 88.673%, chewiness, Mg, Ca, L* value, b* value, protein and fat could be used as key indicators for comprehensive evaluation of its quality. Conclusion The experimental research results obtained by the comprehensive evaluation method of principal component analysis and cluster analysis provide references for consumption and selection of sports nutrition biscuits with high nutritional value, good taste and good quality. The established quality evaluation system provides references for the identification and quality control of sports nutrition biscuits.