Molding water was collected from the organized industrial zone
of Kayseri, in Turkey. Tap water was collected from Yahyalı district,
in Kayseri. In order to prepare the samples to the analysis, 10 mL of
concentrated HNO3 (65%, w/w) and 5 mL of concentrated H2O2
(30%, w/w) were added to 100 mL of water samples, and then
evaporated near to dryness. The residue was transferred to a 50 mL
polyethylene bottles with 3 mL of distilled water. The pH of the
sample solution was adjusted to 6.0 and the final volume was
completed to 10 mL. Analyses for blanks were carried out in the
same way. After the preconcentration step, the final measurement
volume was 300 mL and the measurements were performed by
FAAS.