| 近红外光谱法结合化学计量学测定油茶籽油中脂肪酸组成 |
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| 引用本文： | 张菊华,朱向荣,尚雪波,帅鸣.近红外光谱法结合化学计量学测定油茶籽油中脂肪酸组成[J].食品科学,2011,32(18):205. |
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| 作者姓名： | 张菊华 朱向荣 尚雪波 帅鸣 |
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| 作者单位： | 湖南省农业科学院;湖南省食品测试分析中心; |
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| 基金项目： | 湖南省农业科学院科技创新项目(2009hnnkycx29) |
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| 摘 要： | 选择97个标称纯油茶籽油样品经过皂化、甲酯化后,先经气相色谱分析得到脂肪酸组成相对含量,然后利用透反射模式采集所有样品的近红外光谱,采用偏最小二乘法(partial least squares analysis,PLS)建立油茶籽油的饱和脂肪酸(C16:0+C18:0)、油酸(C18:1)和亚油酸(C18:2)相对含量的校正模型,并将模型用于预测,并对光谱预处理方法进行优化。结果表明:C16:0+C18:0、C18:1和C18:2的交叉验证均方根误差(root mean square error in cross-vali-dation of prediction,REMSECV)分别为0.143、0.448、0.392,预测均方根误差值(root-mean-square error value,RMSEP)分别为0.180、0.598和0.269,上述3种成分预测集相关系数(Rp2)依次分别为0.996、0.999和0.999。近红外光谱法可作为一种快速、无损和准确的方法用于测定油茶籽油的脂肪酸组成,从而鉴别纯油茶籽油的真伪。
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| 关 键 词： | 油茶籽油 近红外光谱(NIRS) 化学计量学 脂肪酸组成 相对含量 |
Analysis of Fatty Acid Profile of Camellia Oil by Near-infrared Spectroscopy and Chemometrics |
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| ZHANG Ju-hua,ZHU Xiang-rong,SHANG Xue-bo,SHUAI Ming.Analysis of Fatty Acid Profile of Camellia Oil by Near-infrared Spectroscopy and Chemometrics[J].Food Science,2011,32(18):205. |
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| Authors: | ZHANG Ju-hua ZHU Xiang-rong SHANG Xue-bo SHUAI Ming |
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| Affiliation: | ZHANG Ju-hua,ZHU Xiang-rong,SHANG Xue-bo,SHUAI Ming(Hunan Food Test and Analysis Centre,Hunan Academy of Agricultural Sciences,Changsha 410125,China) |
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| Abstract: | In the present work,after being saponified and methyl esterified,the fatty acid composition of 97 camellia oil samples was analyzed by gas chromatography.Meanwhile,the near-infrared spectra of all samples were acquired in the transreflection mode.Calibration models for the relative contents of saturated fatty acids(C16:0 + C18:0),oleic acid(C18:1) and linoleic acid(C18:2) were established by partial least-squares regression method were applied.Additionally,the pretreatment of spectra was optimized.The resul... |
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| Keywords: | camellia oil near infrared spectroscopy(NIRS) chemometrics fatty acid composition relative percentage |
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