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US 4,892,817 AGranted
Stable phosphatase substrate composition
AssigneeBioGenex Laboratories
InventorJan W. Pawlak
Life of this patent
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Abstract
A stabilized phosphatase substrate composition is provided comprising an indoxl phosphate, a tetrazolium salt, and a water-soluble ferricyanide/ferrocyanide salt. When present as a solution, the composition also contains a buffer that produces a pH in a range of from about 8 to about 11.
Claims18
A stabilized phosphatase substrate composition, comprising:
- (a) an indoxyl phosphate;
- (b) a tetrazolium salt;
- and
- (c) a water-soluble ferricyanide/ferrocyanide salt, comprising a mixture of ferricyanide and ferrocyanide alkali metal salts having a molar ratio of Fe.sup.3+ to Fe.sup.2+ of 1:1 to 20:1.
1 more element
Dependencies are inferred from the claim text.