Trace analysis by microwave excitation of sealed samples-II determination of 4-100 pg of Cd, In and Tl in 0.5 ml of aqueous solutions.

Trace analysis by optical emission spectrometry by microwave excitation of sealed samples has been improved by use of H(2) as a filler-gas and of BiI(3) as a matrix. It was found that the selection of suitable quartz for the manufacture of the discharge lamps is important. Limits of determination of 4 pg in 0.