Dear Khun Manasarin ,
Thank you very much for your feedback on the lab trials .
Both L-270197 and L-270198 have the same aromatic ingredients as in the previous flavours . Nothing is change in this aspect . The only differences are the types of solvents used , with the objective of having the flavour miscible in your syrup base . The challenge here is also to have similar taste profile and minimize the "ringing" issues .
The changes in solvents should not have significant differences in the taste profile , the explanation here is due to the different density/specific gravity of each individual solvent , IPA has a SG of 0.783 , Ethyl alcohol (0.811) , which are quite similar , PG (1.036) .
L-270197 contains both PG and IPA with IPA having a higher proportion , the selection of IPA is the similar density to ethyl alcohol and therefore the taste profile is similar , but "ringing" issue is not solved . The challenge here is we probably need a certain amount of IPA in a much reduce proportion than L-198251 , so as to maintain the taste profile and hope to minimize the ringing issue .
L-270198 contains PG + emulsifier , from the appearance , the ringing issue is solved but the taste profile is not similar , theoretically , it should not have a significant profile difference . PG has a higher density than IPA , the tendency of the flavour release is much better in a IPA solvent while the PG solvent would have a supressing effect on the aromatic ingredients .
Based on the above and as per our teleconversation earlier , I would appreciate very much if you could help us do the following trials by using flavour combination in the test . If the following tests meet the requirements , we could combine the flavours into one flavour as per dosage level used .
1) L-270197@ 0.125% and L-270198@ 0.125%
2) L-270197@ 0.15% and L-270198@ 0.1%
3) L-270198@ 0.26%
This is a challenging excercise and truely appreciate your patience , let us know if there are other queries .