热滴定法的实质是热反应冷滴定。该法的优点是在普通瓷坩埚内热反应就可进行。另外 ,在室温下加氟化钠既可保证加入的氟化钠与电解质充分混匀 ,又可改善实验人员的操作环境。更突出的优点是热反应在 70 0℃固态下进行 ,酸性电解质中氟化铝的挥发损失减少 ,大大提高实验的准确度 The essence of thermal titration is thermal reaction cold titration. The advantage of this method is that the thermal reaction can be carried out in an ordinary porcelain crucible. In addition, adding sodium fluoride at room temperature can ensure the addition of sodium fluoride and electrolyte to fully mix, but also to improve the experimental personnel operating environment. The more prominent advantage is that the thermal reaction is carried out at a solid state of 70 ° C, the loss of volatilization of aluminum fluoride in the acidic electrolyte is reduced, and the accuracy of the experiment is greatly improved