猪肉储藏时间的电子鼻区分方法.PDFVIP

浙江大学学报( ) 36( 5) : 568~ 572, 2010 Journal of Zhejiang University ( Agric Life Sci) :2010) DOI: 10. 3785/ j. issn. 2010. 05.014 洪雪珍, 王俊, 周博, 王永维 ( , 310029) : 用电子鼻对不同储藏时间(0~ 6 d) 的猪肉样品进行区分, 并确 电子鼻区分不同储藏时间肉 品的较佳实验参数. 对传感器信号进行多因素方差分析( analysis of variance, ANOVA) 表明: 对于固 容器的猪肉样品, 不同的样品质量对电子鼻响应信号的影响极为显著; 其次是样品在烧杯内的密封时 间. 通过单因素方差分析和区分度指标检验,得出猪肉在500 mL 烧杯内的最佳参数为样品质量 10 g 密封时间5 min. 采用以上参数,对储藏0~ 6 d 的猪肉样品进行辨别, 结果发现不管是运用主成分分析 ( principle components analysis, PCA) 还是线性判别分析(linear discriminant analysis, LDA) , 电子鼻都 能很好地区分不同储藏天数的猪肉样品. : 电子鼻; 猪肉; 检测; 新鲜度 : P 274 : A H ONG Xuezhen, WANG Jun, ZH OU Bo, WANG Yongwei ( Dep artment of Biosystems Eng ineering , College of Biosystems E ngineering and Food Science ,Zhej iang Univers ity , H angz ho 310029, China) Discrimination of different storage time of the pork by electronic nose. Journal of Zhejiang University ( Agric Life Sci) , 2010, 36(5) : 568572 Abstract: An electronic nose (enose, PEN 2) was em ployed to classify the pork groups w ith different storage t imes ( 06 d) . o acquire the optimum experimental procedure, the method of analysis of variance (ANOVA) w as adopted. he result s show ed that the mass of the pork samples affected highly significantly the result of discrimination, and next w as the headspacegenerated t ime. By applying one w ay ANOVA and discrimination power ( DP) , the optimum experimental parameters were acquired: 10 g sample with 5 min headspacegenerated t ime. he later experiment was taken under the optimum experimental parameters, and the principle com ponents analysis ( PCA) , as w ell as linear discrim inant analysis ( LDA) were employed. he result show ed that enose with the optimum parameters could clas