Using flame atomic absorption techniques, a rapid and sensitive method was developed for determination of minor and trace contents of copper, cobalt, nickel, zinc, lead, manganese, silver chromium and gold in indigenous non-metallic minerals (phosphorite and bauxite). Different mineral acids (HCl, H2SO4, HNO3) were used for the decomposition of the samples and HNO3 was found to be more suitable for digestion as compared to other acids. The instrumental conditions and other working parameters were optimised. The results obtained by the present method are found to be more reliable as compared to the other existing methods.


K KHAN ,M RIAZ ,M A QAISER ,M MUMTAZ ,Y IQBAL ,