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Some Interferences in the Alkaline Copper Method of Reducing Sugar Analysis
Author(s) -
Çörüş E.,
Pekin B.
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.19840361008
Subject(s) - boric acid , chemistry , absorbance , copper , chloride , maltose , detection limit , inorganic chemistry , chromatography , biochemistry , sucrose , organic chemistry
It has been found that boric acid and chloride ions suppress the reducing power of glucose and maltose. While boric acid does not affect the linearity of absorbance versus concentration curves, nonlinearities may occur if chloride is present in the solution to be analyzed. It has also been found that the proper upper limit of the alkaline copper method is 175 μg/ml for glucose, as opposed to the commonly adopted value of 300 μg/ml.