Chemistry: analytical and immunological testing – Sulfur containing – Organic or sulfhydryl containing
Reexamination Certificate
2005-11-29
2005-11-29
Cole, Monique T. (Department: 1743)
Chemistry: analytical and immunological testing
Sulfur containing
Organic or sulfhydryl containing
C436S119000, C436S164000, C435S004000, C435S232000, C435S130000
Reexamination Certificate
active
06969613
ABSTRACT:
The present invention provides a method for quantitatively determining hydrogen sulfide or sulfide ions conveniently with high sensitivity, which comprises adding to a sample containing hydrogen sulfide or sulfide ions, metal ions or a compound which liberates said metal ions and a metal indicator which reacts with the metal ions and resultingly undergoes color development, wherein the color development is accelerated or inhibited by the hydrogen sulfide or sulfide ions; and measuring the degree of color development of the metal indicator. The present invention further provides a method for quantitatively determining a specific substance, which comprises adding to a sample containing a specific substance, a component which acts on the specific substance so that the specific substance forms hydrogen sulfide or sulfide ions, metal ions or a compound which liberates said metal ions, and a metal indicator which reacts with the metal ions and resultingly undergoes color development, wherein the color development is accelerated or inhibited by the hydrogen sulfide or sulfide ions; and measuring the degree of color development of the metal indicator.
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Ebinuma Hiroyuki
Ushizawa Koji
Cole Monique T.
Daiichi Pure Chemicals Co. Ltd.
Frishauf Holtz Goodman & Chick P.C.
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