A Spectrophotometric Method for the Determination of Iodine Binding Capacity for Starch and Its Components
作者:
M. S. Karve,
N. R. Kale,
期刊:
Starch ‐ Stärke
(WILEY Available online 1992)
卷期:
Volume 44,
issue 1
页码: 19-21
ISSN:0038-9056
年代: 1992
DOI:10.1002/star.19920440106
出版商: WILEY‐VCH Verlag GmbH
数据来源: WILEY
摘要:
AbstractA spectrophotometric method for the determination of iodine binding capacity (IBC) for amylose, amylopectin and starch on a microscale is developed. It is based on the observation that free iodine (I3) can be determined fairly accurately by recording the absorbance at 286 nm. By using a constant volume titration method, bound iodine is calculated by subtracting the free iodine from the total iodine. A plot of free iodine vs bound iodine shows an inflection, which on extrapolation gives the bound iodine. The IBC values obtained by this method are in good agreement with those obtained by conventional potentiometric and amperometric methods.
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