No one is putting AP/ DP into e liquid, it comes from the flavorings used.
If they were interested in actually helping the industry they would have tested samples from the flavor concentrate manufacturers.
You know, the ones that make/produce the flavorings and make the AP / DP / cinnamaldehyde free claims that aren't true.
Well actually that can't be very useful. Flavour companies started out (and still do) making flavours for the food industry. To my knowledge AP/DP are not harmful when eaten or drunk. The doubt, if any, only arises when the flavours are vaporised. Flavour making companies do not necessarily make e-liquids so really the buck stops with the e-juice makers, whether they also make flavours or not.