利用无水碳酸钠及硼酸混合试剂熔解试样，利用铬（Ⅱ）还原液还原，硫酸高铁铵滴定，测定钛的含量。
Mixed reagent of anhydrous soda and boric acid is used to dissolve the sample , Cr (ⅱ) reduction solution is used to deoxidize , and ( NH 4 ) Fe 2 ( SO 4 ) 3 is used to titrate , thus the Ti content is determined .
硫酸高铁铵