| 胡月芳，黄志强，王灿玲.紫外光谱法结合化学计量法鉴别
茶油掺假的研究[J].广东农业科学,2015,42(23):112-116 |
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紫外光谱法结合化学计量法鉴别
茶油掺假的研究 |
| Identification of tea oil adulteration by ultravioletspectrum combined with chemometrics |
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| DOI： |
| 中文关键词: 茶油 紫外光谱法 化学计量法 掺假 鉴别 |
| 英文关键词: tea oil ultraviolet spectrum chemometrics adulteration identification |
| 基金项目:广西高校科学技术研究项目（2013YB238）；
贺州学院服务贺州特色产业专项（2013FWCY01）；贺州
市科学研究与技术开发计划项目（贺科转1408035） |
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| 中文摘要: |
| 采用紫外光谱法结合化学计量法对茶油掺假鉴别进行研究。对纯茶油与掺假花生油、掺假菜籽
油、掺假棕榈油样品进行紫外光谱扫描。结果表明，3 种掺假样品与纯茶油的紫外光谱有不同程度的差异。光
谱数据在200~400 nm 波长范围内经过平滑后，采用主成分分析法进行数据压缩，通过建立模型进行识别，并
对主成分进行投影。3 种掺假样品的前3 个主成分的累计可信度均达到要求；在二维组合投影中，3 种掺假油
的PC1 对PC2 的投影分布最好，不同掺假比例的花生油、菜籽油和棕榈油与纯茶油的投影可明显区分，且掺
假比例越大，掺假样品与纯茶油投影的鉴别效果越好；纯茶油与3 种掺假油样品的鉴别效果顺序为：掺假花
生油> 掺假菜籽油> 掺假棕榈油。紫外光谱法结合化学计量法可作为一种简单、可靠的方法用于鉴别茶油的
掺假。
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| 英文摘要: |
| An approach of ultraviolet（UV）spectra combined with chemometrics was used to identify the
adulteration of tea oil in this study. The pure tea oil and adulterated peanut oil，adulterated rapeseed oil，adulterated
palm oil samples were scanned by UV spectra. The results showed that，the ultraviolet spectra of pure tea oil and three
adulterated samples were different. The spectral data were smoothed in the wavelength range from 200 to 400 nm，then
were compressed by using principal component analysis，and were recognized by establishing model and the principal
component were projective. The results showed that，the cumulative credibility of the first three principal components of
three adulterated samples also achieved the requirement. In the two dimensional combination projection，the projection
distribution of PC1 to PC2 was the best in three kinds of adulteration oil，the projection among different adulteration
ratios of peanut oil，rapeseed oil，palm oil and pure tea oil could be clearly distinguished，the greater of adulteration
ratio，the better differentiating effects between adulteration samples and pure tea oil were obtained. The differentiating
effect order between pure tea oil and three adulteration oil samples was as follows：adulterated peanut oil > adulterated
rapeseed oil > adulterated palm oil. The results indicate that this method can be used as a simple and reliable method to
identify the adulteration of tea oil. |
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