表面活性剂存在下催化剂中钼含量的测定

研究了在火焰原子吸收光谱中表面活性剂对钼的增感作用 ,在 5 0mmol/L曲拉通X— 1 0 0(TX— 1 0 0 )和 5 0mmol/L十二烷基硫酸钠 (SDS)存在下 ,可使钼的吸光度增感 48% ,并且能消除Al、Cu、Mn、Ca、W、Fe、P、V 8种元素对钼的测定干扰。在聚四氟乙烯压力溶弹内 ,用王水作溶剂溶解试样 ,具有试剂用量少免受污染等优点。用此方法测定钼的检出限为 0 .0 5 7μg/mL ,加标回收率在 98.6%～ 1 0 1 .9%之间 ,相对标准偏差小于 0 .87% ,可直接用于催化剂中钼的测定。

Fass-Determination of Molybdenum in the Presence of Surfatant

It is reported in this paper that in the presence of an appropriate amount of surfactant,the sensitivity for the FASS determination of molydemum is remarkably enhanced,when in presence of 50 mmol Tritonx-100(TX-100)and 50 mmol/L sodium dokecyl sulfate (SDS),an enhancement of the absorbance by 48% is observed and the intefernce of eight elements is also found to be eliminated.The sample of hydrogenating catalyst was digested with HCl-HNO 3 (3∶1)and dissolved in water.The lowest detection limit is 0.057 μg/mL for the proposed method.The standard recovery is between 98.6%～101.9%,relative standard deviation is less than 0.87%.The method can be directly used for the determination of the Mo in the above catalyst.