该方法用于测定HF烷基化再生器底部的氟化氢（HF）。底部材料可以是单相或两相系统；两相体系中的上相富含有机物，含少量HF，而下相富含HF。当任何进料流中存在可观的水时，低相可能含有大量水。该方法适用于两种类型的样品。

This method is for determining hydrogen fluoride (HF) in HF alkylation regenerator bottoms. The bottoms material can be either a single or 2-phase system; the upper phase in a 2-phase system is rich in organic material and contains little HF, while the lower phase is rich in HF. The lower phase may contain large concentrations of water when there is appreciable water present in any of the feed streams. This method is applicable to both types of samples.