Aid for determining the presence of occult blood, method of making the aid, and method of using the aid
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United States of America Patent
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Sep 11, 1990
Issued Date -
N/A
app pub date -
Oct 16, 1984
filing date -
Jan 5, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A guaiac reagent-based diagnostic aid for determining the presence of occult blood in an aqueous system contains a micron-sized silica gel into which a guaiac solution has been adsorbed. The guaiac-containing carrier is contacted with a dry, particulate, oxidizing agent, such as a monopersulfate compound, to form a single composition. This composition can be packaged in a water-pervious sandwich. Upon contact with water, the oxidizing agent is activated to produce hydrogen peroxide, which in the presence of occult blood will oxidize the adsorbed guaiac to a brilliant blue reaction product.
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