British Pharmacopoeia 1993

acetic acid add 10 ml add sufficient allow to stand ammonia amount anhydrous Appendix Appendix II Assay BPCRS Calculate the content capsules Carry characteristic chloride chloroform chromatogram obtained chromatography coating combined complies containing 0.1 containing the equivalent cool corresponds described determined dilute dryness ethanol 96 ether evaporate examined extract filter filtrate following requirements following solutions glucose heat hydrochloric acid Hydrochloride Identification Injection intense Labelling layer less liquid maximum measure the absorbance minutes mixture ml of chloroform ml of methanol ml of water ml with water mobile phase obtained with solution Oral peak plate potassium powdered tablets containing preparation prescribed principal procedure produce protected from light Related substances removal requirements residue resulting solution Shake a quantity silica gel sodium hydroxide solution containing solvent standard sterile Storage stored suitable sulphate sulphuric acid suspension temperature titrate Units volumes w/v solution wash water bath weight