This is a list of all the manufacturers that publish their testing on flavours in regards to diketones.
If there are any that I am unaware of, please feel free to comment and contribute as I only vape flavours that have been proven to be diketone free =)
Flavourart GCMS. Please note they do have diketone-containing "aromas" from their kitchen line listed here
Flavor West GCMS (THEY'VE FINALLY CAUGHT ON)
TFA/TPA Flavour Molecule Component list
Capella GCMS
Flavorah GCMS
If there are any that I am unaware of, please feel free to comment and contribute as I only vape flavours that have been proven to be diketone free =)
Flavourart GCMS. Please note they do have diketone-containing "aromas" from their kitchen line listed here
Flavor West GCMS (THEY'VE FINALLY CAUGHT ON)
TFA/TPA Flavour Molecule Component list
Capella GCMS
Flavorah GCMS