The present paper introduces a novel semi-empirical technique for the determination of active bubbles’ number in sonicated solutions. This method links the chemistry of a single bubble to that taking place over the whole sonochemical reactor (solution). The probe compound is CCl₄, where its eliminated amount within a single bubble (though pyrolysis) is determined via a cavitation model which takes into account the non-equilibrium condensation/evaporation of water vapor and heat exchange across the bubble wall, reactions heats and liquid compressibility and viscosity, all along the bubble oscillation under the temporal perturbation of the ultrasonic wave. The CCl₄ degradation data in aqueous solution (available in literature) are used to determine the number density through dividing the degradation yield of CCl₄ to that predicted by a single bubble model (at the same experimental condition of the aqueous data). The impact of ultrasonic frequency on the number density of bubbles is shown and compared with data from the literature, where a high level of consistency is found.

本文介绍了一种新的半经验技术，用于测定超声溶液中活性气泡的数量。这种方法将单个气泡的化学反应与整个声化学反应器（溶液）中发生的化学反应联系起来。探针化合物是 CCl ₄，其中它在单个气泡中的消除量（通过热解）是通过空化模型确定的，该模型考虑了水蒸气的非平衡冷凝/蒸发和穿过气泡壁的热交换，反应热和液体的可压缩性和粘度，在超声波的时间扰动下都沿气泡振荡。CCl ₄水溶液中的降解数据（可在文献中获得）通过将CCl ₄的降解产率除以单个气泡模型（在与水溶液数据的相同实验条件下）预测的降解产率来确定数密度。显示了超声波频率对气泡数量密度的影响，并与文献中的数据进行了比较，发现了高度的一致性。