Determination of the geographical origin of green coffee by principal component analysis of carbon, nitrogen and boron stable isotope ratios

2005 ◽  
Vol 19 (15) ◽  
pp. 2111-2115 ◽  
Author(s):  
Francesca Serra ◽  
Claude G. Guillou ◽  
Fabiano Reniero ◽  
Luciano Ballarin ◽  
Maria I. Cantagallo ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Stable Isotope ◽  
Geographical Origin ◽  
Principal Component ◽  
Isotope Ratios ◽  
Component Analysis ◽  
Stable Isotope Ratios ◽  
Green Coffee

scholarly journals Geographical Origin Identification of Tequila Based on Multielement and Stable Isotopes

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Jian Zhang ◽  
Yiqian Ma ◽  
Feilong Shao ◽  
Yuanyu Lu ◽  
Libo Zhu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Stable Isotopes ◽  
Stable Isotope ◽  
Inductively Coupled Plasma ◽  
Geographical Origin ◽  
Principal Component ◽  
Isotope Ratios ◽  
Stable Isotope Ratio ◽  
Stable Isotope Ratios ◽  
Regional Characteristics

To explore the regional characteristics of multielement and stable isotopes in tequila and the viability of tracing the geographical origin, both inductively coupled plasma mass spectrometry (ICP-MS) and stable isotope ratio mass spectrometry (IRMS) were applied in this study to determine the multielement content and stable isotope ratios of tequila. Then, principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) as chemometrics were conducted in combination to establish a model for determining the geographical origin of Mexican tequila. According to the analytical results, the content of 22 elements varied, as did the ranges of stable isotope δ13C and δ18O values for the tequila obtained from the 4 producing areas. Besides, there were regional characteristics shown to some extent. PCA and PLS-DA methods can be adopted to identify the geographical origin of tequila in Mexico. According to the discriminant verification of 16 samples, the accuracy of prediction reached 93.75%. It has been demonstrated that it is possible to distinguish tequila of different geographical origins in Mexico by combining the determination of the multielement content and stable isotope ratios with chemometric analysis, which lays a foundation for tracing the geographical origin of tequila.

Determination of Agarwood oil’s significant chemical compounds using principal component analysis

2020 ◽  
Author(s):  
Mohamad Hushnie Haron ◽  
Mohd Nasir Taib ◽  
Nurlaila Ismail ◽  
Nor Azah Mohd Ali ◽  
Saiful Nizam Tajuddin
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Chemical Compounds ◽  
Component Analysis ◽  
Significant Chemical

Determination of the Origin of Particulate Organic Matter at the Estuary of Youngsan River using Stable Isotope Ratios (δ13C, δ15N).

2013 ◽  
Vol 46 (2) ◽  
pp. 175-184 ◽  
Author(s):  
Yeon-Jung Lee ◽  
◽  
Byung-Kwan Jeong ◽  
Yong-Sik Shin ◽  
Sung-Hwan Kim ◽  
...  
Keyword(s):  
Organic Matter ◽  
Stable Isotope ◽  
Particulate Organic Matter ◽  
Isotope Ratios ◽  
Stable Isotope Ratios
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