Cyanide Fish in Stores.......

[StirCrazy]

found another way of testing from a web page, this is a cheeper way but still probably fairly expensive.

"You weigh the fish. You throw the
fish in a blendor (or bass-o-matic.) Then you add concentrated sodium
hydroxide, and reflux (boil with a condensor) the mixture for several
hours. Then, you measure the cyanide concentration with an ion-
selective electrode, and back-calculate the tissue concentration in
the fish."

Steve