Simultaneous determination of arsenic, bismuth, antimony, selenium and tellurium in molybdenum by continuous hydride generation and inductively coupled plasma-atomic emission spectrometry

Traces of hydride-forming elements in Mo have been simultaneously determined by continuous hydride generation and inductively coupled plasma-atomic emission spectrometry. The hydride-forming elements in higher oxidation states are coprecipitated with lanthanum hydroxide to separate them from the Mo matrix. Arsenic(V), Bi(III), Sb(V), Se(IV) and Te(IV) are measured by hydride generation. Effects of pH, amount of La and diverse elements on the recoveries and interferences are discussed. A standard addition method is necessary to compensate for the interferences from impurities in Mo. Detection limits of As, Bi, Sb, Se and Te in Mo are 0.2, 0.7, 2, 0.5 and 2μg g-1, respectively. (author)