Evaluation of the bioaccessability of Ca, Fe, Mg and Mn in ground coffee infusions by in vitro gastrointestinal digestion

Journal of the Brazilian Chemical Society

Szymczycha-Madeja, Anna¹  Pohl, Pawel¹  Stelmach, Ewelina¹  Wroclaw University of Technology, Wroclaw, Poland¹ 

关键词: ground coffee;    bioaccessibility;    in vitro gastro-intestinal digestion;    calcium;    iron;    magnesium;    manganese;    FAAS;   

DOI  :  10.5935/0103-5053.20140183

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The bioaccessibility of Ca, Mg, Mn and Fe in ground coffee brews was assessed through in vitro gastrointestinal digestion with stomach and intestinal juice solutions (pepsin, pancreatin and bile salts). Absorption of metals in the intestinal villi was simulated by ultrafiltration over a 3 kDa molecular weight cut-off semi-permeable membrane. Concentrations of Ca, Fe, Mg and Mn in coffee infusions and permeates of gastrointestinal incubates were measured by flame atomic absorption spectrometry. It was established that Mg, with a 62% contribution to the bioaccessible fraction, was the most bioaccessible. The bioaccessibilities of Ca (42%) and Fe (43%) were similar but individual results for both metals varied widely. The least bioaccessible metal was Mn, with an average contribution of 27%. Drinking one cup of coffee daily covers dietary reference intakes of Ca, Fe, Mg and Mn to a small degree (less than 3%).

【 授权许可】

Unknown