Risk Evaluation of Heavy Metal Elements Contamination on "Fenghuang Dancong" Oolong Tea

Abstract

Abstract: The concentrations of nickel, copper, tin, lead, cadmium and mercury elements i"nFenghuang Dancong"oolong tea from high, medium, low altitude district were studied. The nickel, copper, tin, lead, cadmium and mercury ions were pre-column derived by tetra-(amidogenphenyl)-porphine (T4-APP), then determined by solid phase extraction and high perfor-mance liquid chromatography. The results showed that non-pollution processing decreases lead proportion from 2.87 to 1.17μg/g and copper proportion from 12.69 to 8.89μg/g in made oolong tea, as well as lead proportion from 1.80 to 0.60μg/g and copper proportion from 5.43 to 3.62μg/g in oolong tea infusion. The oolong tea produced from high altitude district has optimal sensory quality with sound food safety risk.

Key words: oolong tea, heavy metal elements, high performance liquid chromatography (HPLC), risk evaluation

SU Xin-Guo, DUAN Jun. Risk Evaluation of Heavy Metal Elements Contamination on "Fenghuang Dancong" Oolong Tea[J]. FOOD SCIENCE, 2008, 29(7): 375-377 https://doi.org/

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Risk Evaluation of Heavy Metal Elements Contamination on "Fenghuang Dancong" Oolong Tea

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