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In this work,a multi-purpose calorimeter with micro bomb combustion-dissolution was firstly developed based on the SRC-100 precise dissolving-reaction calorimeter.The new calorimeter mainly includes three innovation points: one was to improve the calorimetric vessel,that is to say,the single-layer heat insulation Dewar bottle has been modified into a double-layer heat insulation Duval bottle; Second,the calorimetric vessel(Dewar bottle)was immersed in the thermostatic tank to reduce the influence of indoor air convection on the calorimetric system,and finally a thermal insulation layer and thermal shield were added to the outside of the thermostatic tank.