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Action of Hydrogen Peroxide in Strongly Alkaline Solutions on Rice Starch
Author(s) -
Hebeish A.,
Bayazeed A.,
Gawad B. Ib. Abdel,
Basily S. K.,
ElBazza S.
Publication year - 1984
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19840361004
Subject(s) - starch , dissolution , stabilizer (aeronautics) , chemistry , hydrogen peroxide , decomposition , viscosity , chelation , nuclear chemistry , gluconic acid , inorganic chemistry , polymer chemistry , organic chemistry , materials science , mechanical engineering , engineering , composite material
Strongly alkaline solutions of H 2 O 2 were found to be very unstable particularly at high temperatures. Efforts were paid to regulate the decomposition of H 2 O 2 in these solutions by incorporation of certain stabilizers, chelating agents and surface active agents. Stabilizers consisting of M g SO 4 . 7H 2 O, anionic/nonionic wetting agent, gluconic acid and EDTA could be achieved. The action of NaOH and H 2 0 2 alone or combinated with this stabilizer formulation was also investigated. The viscosity of rice starch decreased under the influence of either H 2 0 2 or NaOH, indicating that the starch underwent molecular degradation. However, none of these two agents were able to cause complete dissolution of starch even at a temperature as high as 95°C. Complete dissolution could only be achieved in regulated (stabilized) alkaline solutions of H 2 0 2 at 95°C.