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2005•Journal of Instrumental AnalysisRequires access

Study on the Leaching Characteristics and Speciation of Trace Elements in Dracocephlum moldavica L.by FAAS

Guo Chun-mei

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Abstract

A method was developed for the investigation of the leaching characteristics and the speciation of trace Cu,Zn,Mn,Fe,Mg,Ni in Dracocephalum moldavica L.(DML)by flame atomic absorption specˉtrophotometry(FAAS).By using0.45μm filter membrane and D101macroreticular resins,four different species of the decoction,namely the suspended,the soluble,the inorganic and organic species were obˉtained,and the trace elements in those species were determined by FAAS,respectively.The n-C 8 H 17 OH-H 2 O system was proposed to simulate the distribution of the trace elements in the gastric and intestine of the human body.The recovery for the method was92%-106%and the relative standard deviation for5determiˉnations was less than3.8%.The results showed that the trace elements in decoction could exist in different species but usually each element has its respective essential species.

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A method was developed for the investigation of the leaching characteristics and the speciation of trace Cu,Zn,Mn,Fe,Mg,Ni in Dracocephalum moldavica L.(DML)by flame atomic absorption specˉtrophotometry(FAAS).By using0.45μm filter membrane and D101macroreticular resins,four different species of the decoction,namely the suspended,the soluble,the inorganic and organic species were obˉtained,and the trace elements in those species were determined by FAAS,respectively.The n-C 8 H 17 OH-H 2 O system was proposed to simulate the distribution of the trace elements in the gastric and intestine of the human body.The recovery for the method was92%-106%and the relative standard deviation for5determiˉnations was less than3.8%.The results showed that the trace elements in decoction could exist in different species but usually each element has its respective essential species.

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Available abstract

A method was developed for the investigation of the leaching characteristics and the speciation of trace Cu,Zn,Mn,Fe,Mg,Ni in Dracocephalum moldavica L.(DML)by flame atomic absorption specˉtrophotometry(FAAS).By using0.45μm filter membrane and D101macroreticular resins,four different species of the decoction,namely the suspended,the soluble,the inorganic and organic species were obˉtained,and the trace elements in those species were determined by FAAS,respectively.The n-C 8 H 17 OH-H 2 O system was proposed to simulate the distribution of the trace elements in the gastric and intestine of the human body.The recovery for the method was92%-106%and the relative standard deviation for5determiˉnations was less than3.8%.The results showed that the trace elements in decoction could exist in different species but usually each element has its respective essential species.

Key concepts: Chemistry, Atomic absorption spectroscopy, Decoction, Leaching (pedology), Trace element, Genetic algorithm, Environmental chemistry, Relative standard deviation

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