title: Use of an orthogonal function in differential spectrophotometry.
mesh_terms: D000086:Acetazolamide / Q000032:analysis; D006852:Hydrochlorothiazide / Q000032:analysis; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013607:Tablets / Q000032:analysis
chemical_list: D013607:Tablets; D006852:Hydrochlorothiazide; D000086:Acetazolamide