In the calorimeter experiment, the amount of crucible adding directly affects the accuracy of the experimental results, and it is key to master the scientific filling standard. The capacity difference of different specifications of crucibles needs to be paid attention to. Common calorimeter crucible specifications are 10ml, 20ml, etc. The specific capacity needs to be marked with reference to the instrument manual and cannot be estimated based on experience.

The core principle of sample loading is "appropriate amount does not exceed the amount". Generally, it is required that the sample loading amount does not exceed 2/3 of the crucible volume, and at the same time not less than 1/3. If too much sample is added, it may overflow and contaminate the instrument during combustion, and even cause safety hazards; if too little sample is added, it will lead to insufficient combustion and increase data errors. For solid samples, it is necessary to grind them evenly and then compact them to avoid gaps affecting combustion efficiency; liquid samples need to be injected slowly to prevent splashing out.

Special scene adjustment specifications also need to be paid attention to, when testing hot topic value samples, the amount of sample can be appropriately reduced, controlled at about 1/2 of the crucible volume, to prevent the instantaneous release of energy beyond the instrument range; low calorific value samples can be appropriately increased within the safe range to ensure complete combustion.

The inspection steps before operation should not be omitted. Before filling, it is necessary to confirm that the crucible is clean and dry, free of cracks or deformation. After filling, the crucible should be placed smoothly in the oxygen bomb of the calorimeter to ensure good contact. Strictly following the above specifications can not only ensure the safety of the experiment, but also make the measurement results of the calorimeter more accurate and reliable, and help the experiment to advance efficiently.