Page 10 of VA Trace Analyzer - Top-of-the-line instruments for trace and ultra-trace analys by Metrohm AG

two of the many applications determination of zn cd pb and cu in a wastewater sample sample industrial wastewater reagents all reagents used were of the highest purity the ultrapure water was prepared using a water purification unit milli-q millipore method zn cd pb cu anodic stripping with dp differential pulse addition of a standard solution containing zn cd pb and cu sample preparation digestion by uv photolysis to 10 ml acidified sample 20 µl h2o2 30 perhydrol were added and the solution treated for 1 h at 90 °c in the 705 uv digester 10 ml digested sample were transferred to the measuring cell and 1 ml acetate buffer added [ckcl 1.5 mol/l cnaac 0.5 mol/l see application bulletin no 231 before the start of the voltammetric analysis the sample was deaerated in the measurement cell for 5 min with nitrogen short result report units and calculation formulae can be freely chosen voltammogram of the sample digested in the 705 uv digester showing from top to bottom the peaks for cd pb and cu all determined in one segment zn peak not shown regression line for pb resulting from standard additions evaluation reports for zn and cd taken from the full result report 10 va trace analyzer

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