title: Spectrophotometric determination of piperazine in pharmaceutical preparations.
mesh_terms: D002626:Chemistry, Pharmaceutical; D003124:Colorimetry; D010879:Piperazines / Q000032:analysis*; D011809:Quinones; D013053:Spectrophotometry / Q000379:methods; D013607:Tablets
chemical_list: D010879:Piperazines; D011809:Quinones; D013607:Tablets