Trace Analysis Guide - Inorganic Ventures
Retention and physical loss of analyte(s). The use of high purity Mg(NO 3) 2 as an ashing aid will help prevent losses of 'low density' ashes, and will help in preventing retention losses. Difficult to dissolve oxides. Use as low an ashing temperature as possible (400 to 550 °C maximum). Look for Ti, Zr, Nb, Hf, Ta, W, Ni, Co, Fe, Cr, Sb, and Mo.