Determination of Trace Elements in Coffee Beans by XRF Spectrometer Equipped with Polarization Optics and Its Application to Identification of Their Production Area
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- Akamine Takao
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science
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- Otaka Akiko
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science
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- Hokura Akiko
- Department of Green & Sustainable Chemistry, School of Engineering, Tokyo Denki University
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- Ito Yuji
- Kirin Beverage Co., Ltd.
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- Nakai Izumi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science
Bibliographic Information
- Other Title
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- 偏光光学系蛍光X線分析装置を用いるコーヒー豆の微量元素分析及び産地判別への適用
- ヘンコウ コウガクケイ ケイコウ Xセン ブンセキ ソウチ オ モチイル コーヒーマメ ノ ビリョウ ゲンソ ブンセキ オヨビ サンチ ハンベツ エ ノ テキヨウ
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Abstract
The production area of coffee beans becomes a brand name, which gives reputations for the products, which is related to the price. This leads to room for mislabeling the products by unscrupulous market dealers. A rapid and easy method for the analysis of trace-element composition of coffee beans, which could be a good indicator of their production area, was studied in the present work. Coffee beans of 6 different regions (Brazil, Colombia, Vietnam, Indonesia, Tanzania, Guatemala) were analyzed by using a highly sensitive X-ray fluorescence spectrometer with three dimensional polarization optics. The experimental conditions were optimized so as to analyze 6 elements (Mn, Fe, Ni, Rb, Sr, Ba) in coffee beans, and linear calibration curves were obtained for the quantitative analysis of those elements. The analytical results were used in principal-component analysis to classify the coffee beans according to the geographical origin, which results in a successful characterization of the 6 production areas. It is found that roasted beans can be used with the same criterion as their green beans. Consequently, a rapid and easy way for the characterization of the geographic origin of coffee beans has been established in this study.
Journal
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- BUNSEKI KAGAKU
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BUNSEKI KAGAKU 59 (10), 863-871, 2010
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390282679333235328
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- NII Article ID
- 10026670773
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- NII Book ID
- AN00222633
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- NDL BIB ID
- 10868722
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- ISSN
- 05251931
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed