TiP_2-CuSO_4用于凯氏定氮测定食品中蛋白质总量

TiO_2-CuSO_4 as Kjeldahl Digestion Catalyst in Determination of Total Protein in Foods

用 TiO_2-CuSO_4联合催化,在K_2SO_4存在下,用 H_2SO_4消化食品试样测定总蛋白质含量只需50min 便可消化完全,与国家标准采用的 CuSO_4催化剂比较明显地缩短了消化时间。回收率试验、对照试验和重复试验验证了本方法的可靠性。

GB-5009.5-85’s method for determining total protein in foods uses CuSO_4 as catalyst.In the specified time some materials can’t digest enough.The TiO_2-CuSO_4 catalyst mixure makes 50min digestion feasible.The digestion period is shorter.The tri- al makes good recoveries and the results of analysing foods are precise.