COMBUSTION CALORIMETRY ON SAMPLES OF MASS LESS-THAN 10 MG OF SUBSTANCES CONTAINING IODINE WITH A CRMT ROCKING-BOMB CALORIMETER - APPLICATION TO THE STUDY OF P-IODOBENZOIC ACID

We have used a CRMT rocking calorimeter associated with a microbomb to determine the enthalpy of combustion of a sample of mass less than 10 mg of a substance containing iodine. p-Iodobenzoic acid (p-IC6H4CO2H) , a candidate as reference material for combustion calorimetry of subs tances containing iodine, has been investigated. The value of -(3154.2 +/- 1.3) kJ . mol(-1) for its molar enthalpy of combustion obtained w ith this apparatus is in very good agreement with the only literature value obtained by classical bomb combustion calorimetry. (C) 1996 Acad emic Press Limited