Penner Donaldson E M, Inman W R
Mineral Sciences Division, Mines Branch, Department of Mines and Technical Surveys, Ottawa, Canada.
Talanta. 1966 Mar;13(3):489-97. doi: 10.1016/0039-9140(66)80067-x.
A spectrophotometric method for the determination of 0.0005-0.10% of manganese in high-purity niobium, tantalum, molybdenum and tungsten metals is described. The matrix materials are separated from the manganese by extraction as cupferrates, after sample dissolution, then the red complex formed between manganese(II) and 1-(2-pyridylazo)-2-naphthol, PAN, is extracted into chloroform from an ammoniacal tartrate-cyanide medium. The absorbance of the extract is determined at 562 mmicro. With the exception of zinc and lead, other impurities present in the four high-purity metals described do not interfere with the proposed method.
描述了一种用于测定高纯铌、钽、钼和钨金属中0.0005 - 0.10%锰的分光光度法。样品溶解后，通过萃取铜铁试剂将基体材料与锰分离，然后在氨性酒石酸盐 - 氰化物介质中，将锰（II）与1 - （2 - 吡啶偶氮） - 2 - 萘酚（PAN）形成的红色络合物萃取到氯仿中。在562微米处测定萃取液的吸光度。除锌和铅外，所述四种高纯金属中存在的其他杂质不干扰所提出的方法。
