The effect values obtained demonstrate that all four factors were statistically significant. The atomization temperature had a positive effect, and it had the greatest influence on the peak shape. The data presented in Table 2 show that the highest QEIs were obtained at an atomization temperature of 1800 C. The modifier mass was the second most important factor that affects the value of the QEI. This factor had a negative effect, and thus,the highest values for the QEI were obtained using 3 ng as the modifier mass.