基于稀土元素含量鉴别浙江省山茶油产地
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摘要
目的测定浙江省绍兴、丽水、金华、温州、杭州和衢州6个主产区的121份茶油中16种稀土元素含量,通过建立判别模型,对茶油的原产地进行鉴别。方法基于电感耦合等离子体质谱(inductively coupled plasma source mass spectrometer, ICP-MS)测定油茶16种稀土元素含量,并对不同地区油茶中稀土元素含量差异进行分析比较。结果 16种稀土元素总含量在560.0～1560.0 ng/kg之间,不同地区茶油样品中Y、La、Ce、Pr、Eu、Dy、Ho、Er、Tm、Yb、Lu和Th等元素在浙江省内不同地区差异较大(P<0.05)。茶油中多种稀土元素包含的信息能够反映出元素分布与茶油来源的关系。通过判别分析表明,浙江省不同地区茶油样品判别正确率为76.9%～96.4%,交叉验证判别正确率为72.4%～96.4%。结论茶油中稀土元素含量较低,基于稀土元素结合判别分析能够有效鉴别浙江不同地区茶油产地来源。本研究可从一定程度上填补对茶油中稀土元素含量研究和茶油产地判别的空缺,也为其他木本油料的产地鉴别研究提供参考。
Objective To determine the content of 16 kinds of rare earth elements in 121 camellia oil samples from Shaoxing, Lishui, Jinhua, Wenzhou, Hangzhou and Quzhou in Zhejiang province, and identify the country of origin of camellia by establishing the discriminant model. Methods The content of Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Sc, Sm, Tb, Tm, Y, Yb was determined and analyzed by inductively coupled plasma mass spectrometry(ICP-MS). The content of rare earth elements in Camellia oleifera in different areas was compared. Results The total content of 16 rare earth elements ranged from 560.0-1560.0 ng/kg. The content of Y, La, Ce, Pr, Eu, Dy, Ho, Er, Tm, Yb, Lu and Th of camellia oil samples from different regions had significant differences(P<0.05). The information of rare earth elements in camellia oil could reflect the relationship between element distribution and camellia oil source. The linear discriminant analysis showed that the correct classification rates of the camellia oil samples from different regions were 76.9%-96.4%, and the cross validation accuracy of discrimination were 72.4%-96.4%. Conclusion It can be found that the content of rare earth elements in tea oil is in relatively low level. Combined discriminant analysis based on rare earth elements can effectively identify the tea oil sources in different areas of Zhejiang. To some extent, this study can fill the gap in the study of rare earth element content in camellia oil and the identification of camellia oil origin, and also provide reference for the identification of other woody oil origin.
Objective To determine the content of 16 kinds of rare earth elements in 121 camellia oil samples from Shaoxing, Lishui, Jinhua, Wenzhou, Hangzhou and Quzhou in Zhejiang province, and identify the country of origin of camellia by establishing the discriminant model. Methods The content of Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Sc, Sm, Tb, Tm, Y, Yb was determined and analyzed by inductively coupled plasma mass spectrometry(ICP-MS). The content of rare earth elements in Camellia oleifera in different areas was compared. Results The total content of 16 rare earth elements ranged from 560.0-1560.0 ng/kg. The content of Y, La, Ce, Pr, Eu, Dy, Ho, Er, Tm, Yb, Lu and Th of camellia oil samples from different regions had significant differences(P<0.05). The information of rare earth elements in camellia oil could reflect the relationship between element distribution and camellia oil source. The linear discriminant analysis showed that the correct classification rates of the camellia oil samples from different regions were 76.9%-96.4%, and the cross validation accuracy of discrimination were 72.4%-96.4%. Conclusion It can be found that the content of rare earth elements in tea oil is in relatively low level. Combined discriminant analysis based on rare earth elements can effectively identify the tea oil sources in different areas of Zhejiang. To some extent, this study can fill the gap in the study of rare earth element content in camellia oil and the identification of camellia oil origin, and also provide reference for the identification of other woody oil origin.
引文
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[9]胡继藤,唐铁鑫,刘韬,等.GC-MS结合化学计量学方法鉴别不同产地与种源陈皮的研究[J].时珍国医国药,2017,(7):1665-1667.Hu JT,Tang TX,Liu T,et al.Study on the identification of different origin and provenance cord by GC-MS combined with chemometrics[J].Shi Zhenguo Chin Med,2017,(7):1665-1667.
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[11]贺加媛,章乐,陈静君,等.山茶油HPLC-DAD指纹图谱研究[J].浙江农业科学,2016,57(7):1115-1118.He JY,Zhang Y,Chen JJ,et al.Study on HPLC-DAD fingerprint of Camellia oleifera oil[J].Zhejiang Agricl Sci,2016,57(7):1115-1118.
[12]GB 2760-2011食品安全国家标准植物性食品中稀土元素的测定[S].GB 2760-2011 National food safety standard-Determination of rare earth elements in plant foods[S].
[13]Li Y,Yang JL,Jiang Y.Trace rare earth element detection in food and agricultural products based on flow injection walnut shell packed microcolumn preconcentration coupled with inductively coupled plasma mass spectrometry[J].J Agric Food Chem,2012,60(12):3033-3041.
[14]GB 2762 2017食品安全国家标准食品中污染物限量[S].GB 2762 2017 National food safety standard-Food contamination limit[S].
[15]王峰,曹福亮.江苏绿茶中稀土元素的组成特征及分布模式[J].南京林业大学学报(自然科学版),2012,36(4):71-74.Wang F,Cao FL.Content and distribution patterns of rare earth elements in green tea from Jiangsu province[J].J Nanjing Forest Univ(Nat Sci Ed),2012,36(4):71-74.
[16]骆和东,王文伟,王婷婷,等.福建省地产茶叶中稀土元素的组成特征及分布模式的研究[J].卫生研究,2014,43(6):953-958.Luo HD,Wang WW,Wang TT,et al.Study on the composition and distribution pattern of rare earth elements in tea leaves in Fujian province[J].Chin Health Res,2014,43(6):953-958.
[2]周凯,印中华,孟宇微.浙江省油茶产业可持续发展对策研究[J].林业经济问题,2013,33(1):65-69.Zhou K,Yin ZH,Meng YW.The development situation and solution of camellia industry in Zhejiang province[J].Forest Econ Prob,2013,33(1):65-69.
[3]姚云,宋山梅.油茶特色产业与橄榄油产业发展的比较分析[J].中国集体经济,2017,(28):22-23.Yao Y,Song SM.Comparative analysis on the development of Camellia oleifera characteristic industry and olive oil industry[J].Chin Coll Econ,2017,(28):22-23.
[4]赵芳,林立,孙翔宇,等.基于稀土元素指纹分析识别葡萄酒原产地[J].现代食品科技,2015,31(2):261-267.Zhao F,Lin L,Sun XY,et al.Identification of wine of origins using rare earth element fingerprinting[J].Mod Food Sci Technol,2015,31(2):261-267.
[5]姚清华,林虬,颜孙安,等.基于稀土元素指纹分析判别安溪铁观音和华安铁观音的研究[J].现代食品科技,2017,33(4):295-299.Yao QH,Lin Q,Yan SA,et al.Application of heavy rare earth elements as a fingerprint in discriminant analysis of An’xi tieguanyin tea and Hua’an tieguanyin tea[J].Mod Food Sci and Technol,2017,31(4):295-299.
[6]胡书玉,邓宏玉.植物性食品中稀土元素的快速测定[J].现代仪器与医疗,2010,16(2):61-64.Hu SY,Deng HY.Rapid determination of rare earth elements in plant food[J].Mod Instrum Med Treat,2010,16(2):61-64.
[7]李运,徐福荣,张金渝,等.FTIR结合化学计量学对三七产地鉴别及皂苷含量预测研究[J].光谱学与光谱分析,2017,37(8):2418-2423.Li Y,Xu FR,Zhang JY,et al.Study on the origin identification and saponins content prediction of Panax notoginseng by FTIR combined with chemometrics[J].Spectrosc Spectral Anal,2017,37(8):2418-2423.
[8]张丹丹,韦航,邱晓红,等.基于质子转移反应-飞行时间质谱快速鉴别不同产地闽北水仙茶[J].分析化学,2017,45(6):914-921.Zhang DD,Wei H,Qiu XH,et al.Rapid identification of Shuixian tea in northern Fujian from different regions by proton transfer reaction-time of flight-mass spectrometry[J].Chin J Anal Chem,2017,45(6):914-921.
[9]胡继藤,唐铁鑫,刘韬,等.GC-MS结合化学计量学方法鉴别不同产地与种源陈皮的研究[J].时珍国医国药,2017,(7):1665-1667.Hu JT,Tang TX,Liu T,et al.Study on the identification of different origin and provenance cord by GC-MS combined with chemometrics[J].Shi Zhenguo Chin Med,2017,(7):1665-1667.
[10]文韬,郑立章,龚中良,等.基于近红外光谱技术的茶油原产地快速鉴别[J].农业工程学报,2016,32(16):293-299.Wen T,Zheng LZ,Gong ZL,et al.Rapid identification of geographical origin of camellia oil based on near infrared spectroscopy technology[J].JAgric Eng,2016,32(16):293-299.
[11]贺加媛,章乐,陈静君,等.山茶油HPLC-DAD指纹图谱研究[J].浙江农业科学,2016,57(7):1115-1118.He JY,Zhang Y,Chen JJ,et al.Study on HPLC-DAD fingerprint of Camellia oleifera oil[J].Zhejiang Agricl Sci,2016,57(7):1115-1118.
[12]GB 2760-2011食品安全国家标准植物性食品中稀土元素的测定[S].GB 2760-2011 National food safety standard-Determination of rare earth elements in plant foods[S].
[13]Li Y,Yang JL,Jiang Y.Trace rare earth element detection in food and agricultural products based on flow injection walnut shell packed microcolumn preconcentration coupled with inductively coupled plasma mass spectrometry[J].J Agric Food Chem,2012,60(12):3033-3041.
[14]GB 2762 2017食品安全国家标准食品中污染物限量[S].GB 2762 2017 National food safety standard-Food contamination limit[S].
[15]王峰,曹福亮.江苏绿茶中稀土元素的组成特征及分布模式[J].南京林业大学学报(自然科学版),2012,36(4):71-74.Wang F,Cao FL.Content and distribution patterns of rare earth elements in green tea from Jiangsu province[J].J Nanjing Forest Univ(Nat Sci Ed),2012,36(4):71-74.
[16]骆和东,王文伟,王婷婷,等.福建省地产茶叶中稀土元素的组成特征及分布模式的研究[J].卫生研究,2014,43(6):953-958.Luo HD,Wang WW,Wang TT,et al.Study on the composition and distribution pattern of rare earth elements in tea leaves in Fujian province[J].Chin Health Res,2014,43(6):953-958.