Chemistry: analytical and immunological testing – Nitrogen containing – Cyanide or isocyanide
Patent
1993-01-08
1994-08-23
Housel, James C.
Chemistry: analytical and immunological testing
Nitrogen containing
Cyanide or isocyanide
436164, 436169, 436 80, 422 56, 2101982, 2101983, 427125, G01N 3300
Patent
active
053407466
ABSTRACT:
Composite reactive articles are useful for quantifying cyanide ions in solution. The composite reactive articles can be porous reactive supports comprising an inert substrate having immobilized thereon finely divided gold. The porous reactive supports can be particulate, porous fibrous membranes, or solution-cast membranes. Alternatively, the composite reactive articles can comprise porous fibrous membranes having enmeshed therein the aforementioned porous supports which can be in particulate or fibrous forms. The method for quantifying cyanide ions in solution comprising the steps of contacting and passing a solution containing cyanide ions through a reactive support comprising a porous, high surface area, inert substrate on which is immobilized finely divided elemental gold at a controlled rate to provide for a time to provide sufficient contact time for the gold and cyanide ions to react and provide a soluble gold cyanide complex, recovering the effluent comprising said gold cyanide complex, and determining the quantity of cyanide present in the gold cyanide complex.
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Haddad Louis C.
Hagen Donald F.
Markell Craig G.
Perkins Robert E.
Griswold Gary L.
Housel James C.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Pyon Harold Y.
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