Internal Standards : Non-Excel Example
A solution containing 3.47 mM of GG (analyte) and 1.72 mM of S (internal standard) gave peak signals in ICP-AEC of 3.473 and 10.222 mamps respectively. Then 1.00 ml of 8.47 mM S was added to 5.00 ml of an unknown concentration of GG and the mixture was diluted to 10.0 ml. This mixed solution gave peak areas of 5.428 and 4.431 mamps for GG and S respectively. (A) What was the concentration of [S] in the mixed solution? (B) What was the concentration of [GG] in the mixed solution? (C) What was the concentration of [GG] in the criginal unknown?