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I am doing a school project and need some help on parameters used to conduct HPLC of salicylic acid cream. I have been able to find HPLC parameters for testing creams containing salicylic acid. However, the creams that are tested also contain other active ingredients besides salicylic acid. Are there any journal articles that detail steps on how to test a cream that contains only salicylic acid as the active ingredient with the parameters like the column used?
Thanks for the help in advance!
Edit: My lecturer wants us to find articles that detail how to conduct the HPLC on salicylic acid as he wants us to find the specific brands of HPLC machines and materials used. So he wants the brand of the column used etc.
Also, I have already read through the USP and BP and they only provide the HPLC parameters and do not provide information for the preparation of a sample of salicylic acid cream.