石英晶体微天平传感器检测香蕉成熟度的试验

为了对采后香蕉的成熟度进行无损检测，提高货架品质和减少过熟造成的损失，以巴西香蕉为研究对象，以1,2-二油锡甘油-3-磷-L-丝氨酸、半乳糖神经酰胺、纤维素乙酯、乙基纤维素做为敏感材料，采用滴涂法修饰了4个石英晶体微天平（quartz crystal microbalance，QCM），测试了1～7级成熟度的香蕉的挥发性有机化合物的响应特性，并用主成分分析法和线性判别分析法对响应结果做了分析。试验表明，在4种敏感膜中纤维素乙酯对香蕉的7个成熟阶段的挥发性气体的响应最明显，响应值先随香蕉成熟度增加而增加，在4级成熟阶段时最大，随后降低。用主成分分析法对7个成熟阶段香蕉的挥发物的响应值聚类分析，9...

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Bibliographic Details
Published in农业工程学报 Vol. 30; no. 6; pp. 256 - 262
Main Author 侯俊才 侯莉侠 胡耀华 郭康权 佐竹隆顕
Format Journal Article
LanguageChinese
Published 西北农林科技大学机械与电子工程学院,杨凌,712100%筑波大学，日本茨城县筑波市 305-8702 2014
Subjects
主成分分析
成熟度
无损检测
石英晶体微天平
线性判别分析
香蕉
banana
主成分分析
香蕉
nondestructive detection
ripening stage
成熟度
quartz crystal microbalance
石英晶体微天平
线性判别分析
sensors
无损检测
linear discriminant analysis
principal component analysis
Online AccessGet full text
ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2014.06.031

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Summary:为了对采后香蕉的成熟度进行无损检测，提高货架品质和减少过熟造成的损失，以巴西香蕉为研究对象，以1,2-二油锡甘油-3-磷-L-丝氨酸、半乳糖神经酰胺、纤维素乙酯、乙基纤维素做为敏感材料，采用滴涂法修饰了4个石英晶体微天平（quartz crystal microbalance，QCM），测试了1～7级成熟度的香蕉的挥发性有机化合物的响应特性，并用主成分分析法和线性判别分析法对响应结果做了分析。试验表明，在4种敏感膜中纤维素乙酯对香蕉的7个成熟阶段的挥发性气体的响应最明显，响应值先随香蕉成熟度增加而增加，在4级成熟阶段时最大，随后降低。用主成分分析法对7个成熟阶段香蕉的挥发物的响应值聚类分析，97%能够正确聚类；用线性判别分析法可获得100%的识别率。据此，4种材料修饰的石英晶体微天平传感器可以用于香蕉成熟度的识别。该研究结论对香蕉成熟度自动化分级研究有一定实用价值。
Bibliography:11-2047/S
sensors;nondestructive detection;principal component analysis;quartz crystal microbalance;banana;ripening stage;linear discriminant analysis
The ripeness stage is one of the important factors of banana quality, which will affect the sale price of bananas. To consumers, inadequate ripeness means low quality, and over-ripeness means a short shelf life, and both of them will lead to low income to sellers. In order to obtain optimal quality, keep a long shelf period, and minimize losses, it is necessary to automatically detect banana ripeness nondestructively. One promising strategy is using a quartz crystal microbalance （QCM） system to detect volatile organic compounds （VOCs） released during banana ripening. The advantages of this method are quick detection, high sensitivity, and low cost. A QCM sensor is a mass sensor, which is a device of an oscillating circuit. When the mass on its surface is changed, the frequency of an oscillating circuit will change simultaneously. When coated by cross-sensitivity
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2014.06.031