I tried ACN, DMSO and other solvent like methanol, water but its seems that peptide is not soluble and it is forming a gel in ACN and water. The peptide has 10-12 amino acid.
Generally DMF use for preparation of different peptide solution. however, the solubility of peptide in DMF, DMSO, ACN, alcohol is low and type of aminoacid present in peptide effect on solubility.