Certified reference material (CWW-TM-D waste water), which
was tested to verify the accuracy of the developed method, tap and,
molding water (100 mL) samples were used for the analysis of
Ag(I) by the developed procedure. 50 mL portions of CWW-TM-D
waste water were previously treated with a mixture of 5 mL of
HNO3 (65%, w/w) and 2 mL of H2O2 (30%, w/w) and then
evaporated near to dryness. The pH of sample solution was
adjusted to 6.0 and the final volume was completed to 10 mL.