Ammonia and TVN levels in shark.

From: Guy Hocking (Guy.Hocking@coles.com.au)
Date: Sun May 12 2002 - 18:52:10 PDT

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Dear list,

I occasionally have to respond to regulatory agencies who have performed
Total Volatile Nitrogen (or TVB) tests on fish. Whilst there is a great deal
of literature around for bony fish, I do have problems with answering
questions regarding tests performed on shark.
Does anyone have any guidelines on TVN, TVB levels for shark?

Also does anyone have information on ammonia levels in shark? Specifically,
what concentration is ammonia organoleptically detectable? At what level
does the flesh become "unfit for consumption"? (Probably the same.)

Regards,
Guy Hocking
Quality Control Officer Deli.
Coles Supermarkets
mailto:guy.hocking@coles.com.au

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