基于电子鼻技术的陇南花椒品种区分

Identification of Longnan pepper cultivars based on electronic nose technology

为给花椒等级鉴定提供参考,利用电子鼻PEN3.5系统对陇南34个花椒品种进行区分,将测得的响应值数据进行主成分分析、聚类分析以及响应值分析。结果表明,陇南34个花椒品种中,除河北无刺二号与清椒品种区分不显著外,其余花椒品种均区分显著,并且仅5种类型传感器(W5S、W1S、W1W、W2S、W2W)对陇南花椒果实香味响应值较大,其余类型传感器响应值较小,而且不同花椒品种传感器响应值不同。将陇南34个花椒品种分为3类,第1类为无刺大红袍母株、汉源青椒、韩城无刺、嫁接无刺大红袍,第2类为嫁接梅花椒、云华七叶青、茂汶大红袍,其余品种为第3类。其中嫁接梅花椒果实香味含量最高,果实香味含量较高的是八月椒、川陕花椒、莱芜小红椒、韩城无刺、汉源青椒、嫁接无刺大红袍、茂汶大红袍、无刺大红袍母株和云华七叶青。电子鼻适用于陇南花椒品种的区分。

In order to provide some references for identification of pepper grade,34 cultivars of Longnan pepper were identified by electronic nose PEN3.5 system,data of obtained response values were analyzed by principal component analysis(PCA),cluster analysis and response value analysis.The results showed that,except HBWCEH and QJ,the Longnan pepper cultivars can be significantly identified,only 5 types of sensors had larger response values to scent in Longnan pepper fruit,and the other types of sensors had smaller response values.Moreover,response values of pepper sensors to different cultivars were different.Thirty-four cultivars of Longnan pepper were divided into three clusters.The first cluster included WCDHPMZ,HYQJ,HCWC and JJWCDHP,the second cluster included JJMHJ,YHQYQ and MWDHP,and the other cultivars were in the third cluster.JJMHJ had the highest scent content,followed by BYJ,CSHJ,LWXHJ,HCWC,HYQJ,JJWCDHP,MWDHP,WCDHPMZ and YHQYQ.Electronic nose was suitable for identification cultivars of Longnan pepper.