I'm not familiar with food requirements (although a bit more with medical devices) but if you are selling something as food I assume there are some requirements

I'm not familiar with food requirements (although a bit more with medical devices) but if you are selling something as food I assume there are some requirements that your side products and impurities are not harmful or present in sufficiently low amounts to be safe. Seems like GC-MS or something would be relatively straightforward and routine here.