Thanks all
Just to clarify a point, would this ammonia or TMA smell still be apparent
subsequent to deep frying?
Adam Simpson
Health Protection Officer
Public Health
Auckland Healthcare Services
> -----Original Message-----
> From: Andrew Strak [SMTP:abstrak@accesswave.ca]
> Sent: Thursday, 18 May 2000 01:18
> To: AdamS@ahsl.co.nz; seafood@ucdavis.edu
> Subject: Re:
>
> Adam,
>
> Although ammonia is amongst the common products of fish spoilage, in
> particular for shrimp and elasmobranchs, but for most of other sea
> finfish
> it is actually a compound called TMA or trimethylamine derived from the
> reduction of TMAO or trimethylamnine oxide during fish decomposition. And
> if
> the odor threshhold value for ammonia in fish is 110 ppm, for TMA is only
> 0.6 ppm, therefore it is most often the TMA level that determines if the
> product is being considered spoiled or not. Apart from those two pretty
> sharp smelling substances, there is also a gamut of others, some of them
> being typical to specific species and others to the spoilage stages and
> substrates involved. What all of them have in common, it is their
> extremely
> obnoxious sensory properties but not any risk of burning anybody's mouth
> at
> their predominant concentration levels.
>
> Regards,
>
> Andrew Strak
>
>
> ----- Original Message -----
> From: "Adam Simpson" <AdamS@ahsl.co.nz>
> To: <seafood@ucdavis.edu>
> Sent: Tuesday, May 16, 2000 11:24 PM
>
>
> > Hi List
> >
> > I have received several complaints relating to a very strong ammonia
> smell
> > associated with fillets from various different types of fish. I believe
> > this is an indication of spoilage and have also been made aware it
> relates
> > to the gutting of the fish. Is there any literature or comments out
> there
> > to provide me with further explaination/clarification? Could this smell
> > ever reach the stage of causing a physical reaction such a burns to the
> > mouth?
> >
> > Much appreciated
> >
> > Adam Simpson
> > Health Protection Officer
> > Public Health, Auckland Healthcare Services
> >
> >
This archive was generated by hypermail 2b29 : Thu May 18 2000 - 14:09:24 PDT