On the Nordic Pharmacopoeia limit test for heavy metals. Heating with anhydrous sodium sulphate as a source of error.
D002104:Cadmium / Q000032:analysis; D002110:Caffeine / Q000032:analysis; D002713:Chlorine; D003300:Copper / Q000032:analysis; D006358:Hot Temperature; D007501:Iron / Q000032:analysis; D007854:Lead / Q000032:analysis; D008670:Metals / Q000032:analysis*; D008722:Methods; D009664:Norway; D009966:Orphenadrine / Q000032:analysis; D010602:Pharmacopoeias as Topic; D012822:Silicon Dioxide / Q000032:analysis*; D012964:Sodium; D013057:Spectrum Analysis; D013431:Sulfates
D008670:Metals; D013431:Sulfates; D002104:Cadmium; D007854:Lead; D002110:Caffeine; D002713:Chlorine; D012822:Silicon Dioxide; D003300:Copper; D012964:Sodium; D009966:Orphenadrine; D007501:Iron