Chemistry: analytical and immunological testing – Optical result – Including reagent preparation
Reexamination Certificate
2007-07-17
2007-07-17
Warden, Jill (Department: 1743)
Chemistry: analytical and immunological testing
Optical result
Including reagent preparation
C436S119000, C436S120000, C436S164000, C435S004000, C435S130000, C435S232000
Reexamination Certificate
active
10743741
ABSTRACT:
The present invention provides a method for quantitatively determining a reducing substance, which comprises reacting a reducing substance in a test specimen with iron (III) ions, reacting iron (II) ions formed by reduction of the iron (III) ions or residual iron (III) ions with a metal indicator which is capable of reacting specifically with the iron (II) ions or the residual iron (III) ions to undergo color development, and carrying out quantitative determination by measuring the degree of color development, wherein a chelating agent which is specific to copper ions is added to the test specimen before the reaction of the reducing substance with the iron (III) ions; and a reagent used for it.
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Ebinuma Hiroyuki
Matsumoto Takuji
Sekiguchi Masahiro
Daiichi Pure Chemicals Co. Ltd.
Moss Keri
Warden Jill
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