Two micro-combustion bombs developed from a high pressure stainless steel vessel have been adapted to a Setaram C80 Calvet calorimeter. The constant of each micro-bomb was determined by combustions with benzoic acid NIST 39j, giving for the microcombustion bomb in the measurement sensor k(m) = (1.01112 +/- 0.00054) and for the micro-combustion bomb in the reference sensor k(r) = (1.00646 +/- 0.00059) which means an uncertainty of less than 0.06 per cent for calibration. The experimental methodology to get results of combustion energy of organic compounds with a precision also better than 0.06 per cent is described by applying this micro-combustion device to the measurement of the enthalpy of combustion of the succinic acid, giving Delta(c)H(m)degrees (cr, T = 298.15 K) = -(1492.89 +/- 0.77) kJ (.) mol(-1). (C) 2004 Elsevier Ltd. All rights reserved.