花青素
重复性
再现性
相对标准差
化学
颜料
数学
食品科学
色谱法
有机化学
检出限
作者
Jungmin Lee,Robert W. Durst,Ronald E. Wrolstad,T.C. Eisele,M. Mónica Giusti,J Hach�,H.-J. Hofsommer,Susanne Koswig,Darcy A. Krueger,Steve Kupina,Samuel K. Martin,Berit Karoline Martinsen,Tatiana Miller,F Paquette,A Ryabkova,Grete Skrede,U Trenn,JoLynne D. Wightman
出处
期刊:Journal of AOAC International
[Oxford University Press]
日期:2005-09-01
卷期号:88 (5): 1269-1278
被引量:2049
标识
DOI:10.1093/jaoac/88.5.1269
摘要
This collaborative study was conducted to determine the total monomeric anthocyanin concentration by the pH differential method, which is a rapid and simple spectrophotometric method based on the anthocyanin structural transformation that occurs with a change in pH (colored at pH 1.0 and colorless at pH 4.5). Eleven collaborators representing commercial laboratories, academic institutions, and government laboratories participated. Seven Youden pair materials representing fruit juices, beverages, natural colorants, and wines were tested. The repeatability relative standard deviation (RSDr) varied from 1.06 to 4.16%. The reproducibility relative standard deviation (RSDR) ranged from 2.69 to 10.12%. The HorRat values were < or = 1.33 for all materials. The Study Director recommends that the method be adopted Official First Action.
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