Transcription of 2.5. ASSAYS - DrugFuture
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2.5. ASSAYS - DrugFuture
EUROPEAN PHARMACOPOEIA Iodine ASSAYS01/2008 ACID VALUEThe acid valueIAis the number that expresses, in milligramsthe quantity of potassium hydroxide required to neutralise thefree acids present in 1 g of the g of the substance to be examined, or thequantity prescribed, (mg),in50mLofamixtureofequalvolumes ofethanol (96 per cent) Randlight petroleum R3,previously neutralised M potassium Msodium hydroxide, unless otherwise specified, using mL ofphenolphthalein solution R1as indicator. If necessary, heat toabout 90 C to dissolve the substance to be examined. Whenthe substance to be examined has dissolved, titrate Mpotassium M sodium hydroxideuntil the pinkcolour persists for at least 15 s (nmL of titrant). When heatinghas been applied to aid dissolution, maintain the temperature atabout 90 C during the ESTER VALUEThe ester valueIEis the number that expresses in milligramsthe quantity of potassium hydroxide required to saponify theesters present in 1 g of the substance.
EUROPEAN PHARMACOPOEIA 7.0 2.5.4. Iodine value 2.5. ASSAYS 01/2008:20501 2.5.1. ACID VALUE The acid value IA is the number that expresses, in milligrams the quantity of potassium hydroxide required to neutralise the
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