Determination of Tannin in Pomegranate Peel in Different Areas of Xinjiang by Casein Method

doi:10.7506/spkx1002-6630-200908059

FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (8): 260-262.doi: 10.7506/spkx1002-6630-200908059

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Determination of Tannin in Pomegranate Peel in Different Areas of Xinjiang by Casein Method

ZHANG Xiao-ying PALIDA Abu-lizi* ZHU Yan MIREGULI

(School of Pharmaceutical Sciences, Xinjiang Medical University, Urumqi 830054, China)

Received:2008-06-08 Revised:2008-12-29 Online:2009-04-15 Published:2010-12-29
Contact: PALIDA Abu-lizi* E-mail:palida3345@yahoo.com.cn

Abstract

Abstract:

The casein method was established to determine the content of tannin in pomegranate peel in different areas of Xinjiang. The results showed that there is good relationship between gallic acid concentration and absorbance of gallic acid-phosphomolybdiumtungstic acid-sodium carbonate system at 760-nm wavelength in the linear range of 1.02 to 6.12μg/ml (R2 = 0.9993); The average spike recovery is 97.4% with the RSD of 1.21% (n = 6); The contents of tannin in pomegranate peel in Pishan and Cele counties are lower than those in Shufu, Shule and Yecheng counties. The method is accurate, credible and reproducible, so it can be applied to the quality control of pomegranate peel as medicinal material.

Key words: pomegranate peel, tannin, casein method

CLC Number:

TS201.4

ZHANG Xiao-ying PALIDA Abu-lizi* ZHU Yan MIREGULI. Determination of Tannin in Pomegranate Peel in Different Areas of Xinjiang by Casein Method[J]. FOOD SCIENCE, 2009, 30(8): 260-262.

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Determination of Tannin in Pomegranate Peel in Different Areas of Xinjiang by Casein Method

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