title: Quantitative determinations by ion pair extraction. Part 12. Extraction of amino acids with quaternary ammonium ions.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D006909:Hydroxyproline / Q000032:analysis; D007474:Ion Exchange; D007930:Leucine / Q000032:analysis; D008715:Methionine / Q000032:analysis; D010649:Phenylalanine / Q000032:analysis; D011392:Proline / Q000032:analysis; D000644:Quaternary Ammonium Compounds; D012996:Solutions; D014364:Tryptophan / Q000032:analysis
chemical_list: D000596:Amino Acids; D000644:Quaternary Ammonium Compounds; D012996:Solutions; D010649:Phenylalanine; D014364:Tryptophan; D011392:Proline; D008715:Methionine; D007930:Leucine; D006909:Hydroxyproline