ATOMIC-EMISSION SPECTRUM ANALYSIS OF ALUMINUM-OXIDE USING AN ARGON ARC PLASMATRON

It is shown that an argon are plasmatron can be used for direct atomic -emission analysis of aluminum oxide. Conditions for powder spraying i nto the plasma torch were optimized. Torch zones exhibiting maximum us eful signals of atomic and ionic lines that are used as analytical one s were determined. The limits of determination for simultaneous multie lement analysis (vaporization of 75 mg of samples) are (1-7) x 10(-6)% for Mg, Ca, Sr, Ba, Mn, and Ga; (1-3)x10(-5)% for Cr, Ni, Mo, Fe, Ti, V, and Y; and (1-2)x10(-4)% for Si, Pb, Sn, and Bi. The advantages of the use of a plasmatron as compared to an are Light source for analyz ing aluminum oxide are simple sample treatment, low limits of detectio n, high reliability, and high rapidity of analysis.