title: Application of orthogonal functions to spectrophotometric analysis of weakly absorbing compounds in tablets.
mesh_terms: D001593:Benzyl Compounds / Q000032:analysis; D002744:Chlorpheniramine / Q000032:analysis; D004155:Diphenhydramine / Q000032:analysis; D004809:Ephedrine / Q000032:analysis; D004987:Ethers / Q000032:analysis; D006634:Histamine H1 Antagonists / Q000032:analysis; D008433:Mathematics; D008722:Methods; D008744:Methylamines / Q000032:analysis; D013053:Spectrophotometry; D013607:Tablets / Q000032:analysis*
chemical_list: D001593:Benzyl Compounds; D004987:Ethers; D006634:Histamine H1 Antagonists; D008744:Methylamines; D013607:Tablets; D002744:Chlorpheniramine; D004155:Diphenhydramine; D004809:Ephedrine