ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Effect of tannin on the reaction of pectin with gelatin

V. Zitko and J. Rosík

Slovak Academy of Sciences, Bratislava

Abstract: The flocculating reactions in the system pectin-tannin-gelatin in relation to wt. ratios of gelatin:pectin, of tannin:gelatin and in the relation to pH and concns. of KCl and FeCl₃ were described. Insol. complexes of pectin, tannin, and gelatin were formed at values of wt. ratio of tannin:gelatin <2. The amt. of the pectin in the ppt. decreased with an increasing concn. of tannin. At a wt. ratio of tannin:gelatin >2, the ppt. contained only complexes of tannin and gelatin. In the presence of KCl and FeCl₃, the amt. of pptd. pectin was decreased, but the amt. of tannin and gelatin in the ppt. was almost const.

Full paper in Portable Document Format: 172a109.pdf (in Slovak)

Chemical Papers 17 (2) 109–117 (1963)