Quick acting toxic ammonia test for aqueous samples
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United States of America Patent
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Apr 25, 2006
Grant Date -
N/A
app pub date -
Mar 16, 1999
filing date -
Mar 16, 1999
priority date (Note) -
Expired
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Abstract
A method, test reagent and device usable as a test strip for detecting toxic ammonia levels in water samples such as aquarium water. The volume of the water to be tested contacted with a soda lime reagent to raise the pH to at least 10, and simultaneously contacted with a hydrophobic barrier membrane capable of allowing only ammonia gas to pass through. The membrane is coated with a pH chromogenic indicator mixture which changes color if ammonia gas passes through. The color response of the sample is compared with standard color charts to determine the toxic ammonia potential.
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