Determination of Tea Polyphones by Flow Injection Resonance Light Scattering Method

doi:10.7506/spkx1002-6630-200910050

FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (10): 219-221.doi: 10.7506/spkx1002-6630-200910050

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Determination of Tea Polyphones by Flow Injection Resonance Light Scattering Method

ZHONG Ming-hua

(Department of Chemistry, Hanshan Normal University, Chaozhou 521041, China)

Received:2008-07-27 Revised:2008-11-17 Online:2009-05-15 Published:2010-12-29
Contact: ZHONG Ming-hua E-mail:zhongmh@hstc.edu.cn; hszhongmh@126.com

Abstract

Abstract:

To establish a new flow injection resonance light scattering method for the determination of tea polyphones (TP)， PbTP was determined by resonance light scattering method in acetic acid buffer medium at pH 7. The amount of TP can be determined directly by mensuring the resonance light scattering intensity of PbTP that is precipitated by reaction of TP with Pb (Ⅱ), and thus a flow injection analysis-resonance light scattering method was proposed to determine TP. The linear range of determination was 20 to 400 μg/ml. The detection limit was 6.62 μg /ml. This method was simple, consumed less reagent and had wide linear range. It can be applied to the determination of TP in tea.

Key words: tea polyphones, flow injection, resonance light scattering

CLC Number:

TS207.3

ZHONG Ming-hua. Determination of Tea Polyphones by Flow Injection Resonance Light Scattering Method[J]. FOOD SCIENCE, 2009, 30(10): 219-221.

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Determination of Tea Polyphones by Flow Injection Resonance Light Scattering Method

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