Mixed internal standard solutions with a concentration of 200mg L-16Li,45Sc,72Ge,115IN and 209Bi was used to correct changes in the sample uptake rate and plasma conditions for the ICP-MS measurements.The analytical characteristic of the proposed method were obtained for the ten elements studied under the optimized conditions.Table 2 presents the linear ranges used for calibration and the coefficients of detection(LOD)and limits of quantification(LOQ)for each metal were determined as follows: 10 independent analyses of a blank solution spiked with the metal at a lower level of concentration of the analytical curve were petformed. The LOD and LOQ were calculated from the standard deviation of these determinations