G - Physics – 01 – N
Patent
G - Physics
01
N
167/37
G01N 33/53 (2006.01) G01N 33/94 (2006.01) G01N 1/00 (2006.01)
Patent
CA 1340709
A method for the direct analysis of analyte in keratinized structures, e.g., hair, fingernails and toenails, which comprises preparing a mixture containing a low redox potential compound such as dithiothreitol or dithioerythritol, an enzyme suitable for the degradation of the keratin structure and a sample of the keratin structure; permitting the enzyme to at least substantially degrade the sample of keratin structure, and subjecting the mixture to analysis to determine the identity and amount of analyte in the keratin substance sample. To accelerate the method, cupric sulfate or sodium arsenite may be added to the mixture after degradation of the keratin sample. The enzyme may be a peptidase, endopeptidase or proteinase, with papain, chymopapain, and proteinase K being preferred for use in the invention.
587059
Baumgartner Werner A.
Psychemedics Corporation
Ridout & Maybee Llp
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