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Determination of Metal Elements in Extracting Traits of Mountain Green Tea

Cui Gui-hua

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Abstract

[Objective]To determine the content of metal elements in Mountain Green Tea and its extraction liquid,so as to provide reference basis for its further development.[Method]Mountain Green Tea samples were digested by wet digestion and soaked by Deionized water.The contents of Mg、Fe、Mn、Cu、Zn、Ni、Cr were determined by flame atomic absorption spectrophotometry(FAAS).[Result]The contents of metal elements in Mountain Green Tea were MnMgFeZnCuNiCr;The recoveries of standard addition of various experimental elements were 95.05%-101.63%;and their relative standard deviation were 1.67%-4.07%.The extraction rate changed with time.The optimum digestion time was 30 min.[Conclusion]Determination of metal element contents in Mountain Green Tea by FAAS iss feasible and reliable.

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What this paper is about

[Objective]To determine the content of metal elements in Mountain Green Tea and its extraction liquid,so as to provide reference basis for its further development.[Method]Mountain Green Tea samples were digested by wet digestion and soaked by Deionized water.The contents of Mg、Fe、Mn、Cu、Zn、Ni、Cr were determined by flame atomic absorption spectrophotometry(FAAS).[Result]The contents of metal elements in Mountain Green Tea were MnMgFeZnCuNiCr;The recoveries of standard addition of various experimental elements were 95.05%-101.63%;and their relative standard deviation were 1.67%-4.07%.The extraction rate changed with time.The optimum digestion time was 30 min.[Conclusion]Determination of metal element contents in Mountain Green Tea by FAAS iss feasible and reliable.

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Available abstract

[Objective]To determine the content of metal elements in Mountain Green Tea and its extraction liquid,so as to provide reference basis for its further development.[Method]Mountain Green Tea samples were digested by wet digestion and soaked by Deionized water.The contents of Mg、Fe、Mn、Cu、Zn、Ni、Cr were determined by flame atomic absorption spectrophotometry(FAAS).[Result]The contents of metal elements in Mountain Green Tea were MnMgFeZnCuNiCr;The recoveries of standard addition of various experimental elements were 95.05%-101.63%;and their relative standard deviation were 1.67%-4.07%.The extraction rate changed with time.The optimum digestion time was 30 min.[Conclusion]Determination of metal element contents in Mountain Green Tea by FAAS iss feasible and reliable.

Key concepts: Green tea, Extraction (chemistry), Relative standard deviation, Metal, Chemistry, Atomic absorption spectroscopy, Digestion (alchemy), Environmental chemistry

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