hydrofluoride

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

同时，对所拟溶样条件下所得分析结是否为题进行了进一步探讨，结证实，所拟溶样条件下结为。