Detection is different to measurement though - as you said there would be a significant error at that level. You certainly couldn’t measure fipronil to +/-0.5ppb in a 3.5ml cuvette sample, so the guy who had a 5ppb result was treated very unfairly. It could in reality have been 4ppb or 6ppb or 0ppb who-knows-what, depending on sample preparation and whether - oh my, can’t imagine how that accidentally got in there …
That would be a lot more plausible. I’m guessing the daft reporters got the limit wrong by a factor of 1000.
Either way, there is absolutely no need to destroy all those chickens. I really, really dislike the farming industry’s cavalier attitude to chemicals, so confiscate them if you must, but chucking them in the grinder is barbaric on several different levels.
Fipronil is more toxic to humans than most agricultural chemicals, but the Dutch limit is 25ug per egg (about 200,000x times smaller than the lethal dose for humans). Assuming Taiwan’s is the same, what we’ve got here is a classic case of MEN WITH CLIPBOARDS, which is only slightly less troublesome than men with leather trenchcoats and spooky insignia on their caps.