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US 2021/0025859 A1Published application
Method for producing a purple complex for the presence of lead using sodium rhodizonate without use of strong acid
AssigneeQuantech, Inc.
InventorsFrederic G. Dewalt, David C. Cox
Life of this patent
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Abstract
A method using ascorbic acid (Vitamin C) as part of a chemical test kit employing sodium rhodizonate as the coloring agent for producing a yellow-orange to purple color transition for detection of lead in various media eliminating the use of strong acid.
Claims15
A method of detecting lead in media using ascorbic acid instead of strong acid to generate a purple (violet) color change when using sodium rhodizonate.
Dependencies are inferred from the claim text.