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An SIMS Study on the Fingerprint Characteristics of Minerals with Special Reference to Minerals from the Jinningian Granites in the Yunnan Sector of the Xikang-Yunnan Axis
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作者 Zhou Shitao Liu Yongkang Institute of Geochemistry, Academia Sinica, Guiyang 550002 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1991年第3期251-257,共7页
In this paper such minerals as apatite, zircon and biotite from granites were determined and analyzed bysecondary ion mass spectrometry (SIMS) for their isotopic ages, REE composition, trace elements and volatilecompo... In this paper such minerals as apatite, zircon and biotite from granites were determined and analyzed bysecondary ion mass spectrometry (SIMS) for their isotopic ages, REE composition, trace elements and volatilecomponents with an attempt to shed light on the origin and formation environments of the Jinningian granitesin the Yunnan sector of the Kangdian (Xikang- Yunnan) earth's axis. The results show that the apatites,zircons and biotites of different geneses possess different fingerprint characteristics. Some correlations havebeen found between trace elements and volatile components contained in the minerals from granties. 展开更多
关键词 SIMS An SIMS Study on the fingerprint characteristics of Minerals with Special Reference to Minerals from the Jinningian Granites in the Yunnan Sector of the Xikang-Yunnan Axis AXIS
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Volatile Compounds Fingerprints for White Duck down and White Goose down Determined by Gas Chromatography-Ion Mobility Spectrometry
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作者 Fei Wang Qihui Zhang +6 位作者 Yiwen Lin Wenjian Chen Hui Wang Kuntai Li Jihua Li Yuliang Chen Leiyu Wang 《Agricultural Sciences》 CAS 2023年第3期432-445,共14页
This work first describes a simple approach for the untargeted profiling of volatile compounds for distinguishing between white duck down (WDD) and white goose down (WGD) based on resolution-optimized GC-IMS combined ... This work first describes a simple approach for the untargeted profiling of volatile compounds for distinguishing between white duck down (WDD) and white goose down (WGD) based on resolution-optimized GC-IMS combined with optimized chemometric techniques, namely PCA. The detection method for down samples was established by using GC-IMS. Meanwhile, the reason of unpleasant odors caused by WDD was explained on the basis of the characteristic volatile compounds identification. GC-IMS fingerprinting can be considered a revolutionary approach for a truly fully automatable, cost-efficient, and in particular highly sensitive method. A total of 22 compounds were successfully separated and identified through GC-IMS method, and the significant differences in volatile compounds were observed in three parts of WDD and WGD samples. The most characteristic volatile compounds of WGD belong to aldehydes, whereas carboxylic acids from WDD were detected generated by autoxidation reaction. Meanwhile, the main reason of unpleasant odor generation was possibly attributed to the high concentration of volatile carboxylic acids of WDD. Therefore, the constructed model presents a simple and efficient method of analysis and serves as a basis for down processing and quality control. 展开更多
关键词 Gas Chromatography-Ion Mobility Spectrometry (GC-IMS) Principal Components Analysis (PCA) DOWN characteristic Volatiles fingerprints Carboxylic Acids
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X-ray Comparative Analysis of Rhubarb in Different Production Areas of Qinghai 被引量:1
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作者 王宁芳 拉本 《Agricultural Science & Technology》 CAS 2009年第6期119-120,124,共3页
[Objective] The aim of this study was to provide a basis for distinguishing quality of rhubarb in different production areas. [Method ] X-ray diffraction patterns of rhubarbs in different production areas of Qinghai w... [Objective] The aim of this study was to provide a basis for distinguishing quality of rhubarb in different production areas. [Method ] X-ray diffraction patterns of rhubarbs in different production areas of Qinghai were obtained by X-ray diffraction analysis, and then its similarity analysis was also investigated. [ Result] The content of chemical components in rhubarbs from different production areas had differences, but its diffraction patterns and diffraction peaks had certain fingerprint characteristics. [ Conclusion] X-ray diffraction method is a fast and effective method for identifying rhubarb and other Chinese herbal medicines in different production areas. 展开更多
关键词 RHUBARB X-RAY Diffraction map Diffraction peak fingerprint characteristics
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