Thermal behavior of the chlorophyll extract from a mixture of plants and seaweed

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• 作者：Adriana Samide ; Bogdan Tutunaru
• 关键词：Chlorophyll ; UV–Vis spectrophotometry ; Thermal analysis ; Decomposition mechanism
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：127
• 期：1
• 页码：597-604
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
• 出版者：Springer Netherlands
• ISSN：1588-2926
• 卷排序：127

文摘

In this study the UV–Vis spectrophotometry and thermal analysis were used to characterize a commercialized product, as “Chlorophyll” named in our study with the acronym FARCH-phyll, this being offered as a detoxifier for the human body. The information update concerning thermal decomposition mechanism of chlorophyll represents the basic purpose of this investigation, and the secondary aim is related to the dealer prospectus confirmation. Thus, by the UV–Vis spectrophotometry, the chlorophyll “a,” was detected in FARCH-phyll extracts in both ethylic alcohol and dioxane showing two absorption bands at the wavelengths: λ = 664/428 nm and λ = 665/430 nm, respectively. The thermal decomposition of FARCH-phyll was performed in the temperature range between room temperature and 700 °C, and the thermogravimetric curve highlighting three levels of mass loss accompanied by one endothermic process at 54.8 °C and two exothermic processes at 333.6 and 492.2 °C, respectively, was marked on both curves of differential scanning calorimetry and differential thermal analysis. The first step of mass loss was accurately attributed to the releasing of physically adsorbed compounds on the powder surface. The next levels of powder thermal degradation constituted the basis for identifying the decomposition steps of chlorophyll from FARCH-phyll, in order to show its ways of transformation/decomposition in pheophytin/pyropheophytin and pyropheophorbide in competition with decomposition processes of other components from FARCH-phyll.