1.By fuming with sulfuric-phosphoric acid mixture the residual hydrofluoride was then expelled，and boron was finally determined by curcumin spectrophotometry after distillation.

1.同时，对所拟溶件下所得硼的分析结是否为全硼问题一步探讨，结证实，所拟溶件下硼的测定结为全硼。