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The Method of Tannin-protein Precipitate to Determinate Content of Tannins in Grape Seed(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年14期
Page:
23-26
Research Field:
Publishing date:

Info

Title:
The Method of Tannin-protein Precipitate to Determinate Content of Tannins in Grape Seed
Author(s):
HU Li-zhi; YUAN Chun-long; YUAN Lin
College of Enology，Northwest Agricultural and Forestry University，Yangling，Shaanxi 712100
Keywords:
tannins; tannin-protein precipitate; precision; recovery rate; MDL
PACS:
TS 261.7
DOI:
-
Abstract:
Using the method of tannin-protein precipitate to detect the content of tannins，the experimental condition from the precision of the machine，linearity，method detection limit (MDL)，accuracy and recovery to carry on the comparison were analyzed，in order to determinate the concentration of tannins in the ultrafine powder of grape seed.The results showed that the linearity of correlation of catechin were good in the range of 50~250 μg/mL (R2=0.9966)，the precision of the machine was 1.144％，MDL 0.339 μg/mL，the parallel precision 0.2454％，the repeatability precision 0.2159％ and the recovery rate was 97.47％~101.49％.The method was able to determine the content of tannins in the ultrafine powder of grape seed.

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Last Update: 2014-09-17