Comprehensive Evaluation of Salt Based on Principal Component Analysis and Cluster Analysis
In order to understand the quality status of salt products in China,in this paper,the components and taste of 28 kinds of commercially available salt are analyzed,and the salt samples are evaluated and classified by correlation analysis,principal component analysis,establishing comprehensive evaluation model and cluster analysis.The results show that the content of sodium chloride in well and rock salt is high,up to 99.72％.The content of sodium chloride in sea salt is low,but it is rich in inorganic elements such as calcium,magnesium and potassium.There are significant differences in five taste indexes of salt samples(P＜0.05).Four principal components are extracted in ten quality evaluation indexes,and the cumulative variance contribution rate is 79.041％.The comprehensive evaluation model is established,and it is found that the score of sea salt is the highest,followed by well and rock salt,and the score of lake salt is the lowest.When the Euclidean distance is 10,the salt samples could be divided into four categories,which confirms to the actual situation.In conclusion,the effects of principal component analysis and cluster analysis are good,and their application in the field of quality evaluation can provide scientific basis for the quality control of salt.
NETL
NSTL
万方数据
维普
