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Chromium(VI) analysis

Chromium(VI) analysis in a chromium-coated metal sample

Chromium (VI)  in a metal sample

Chromium(VI) analysis in a chromium-coated metal sample, unmodified (black) and with the addition of 20 μg/L of chromium(VI) (red). The recovery rate is 100%. Column: Metrosep A Supp 5 - 150/4.0; eluent: 10 mmol/L Na2CO3, 1 mmol/L NaHCO3, 0.7 mL/min; sample volume: 200 μL; post-column derivatization with 1,5-diphenylcarbazide.


Chromium(VI) analysis in a  polymer sample

Chromatograms of a polymer sample

Chromatograms of a polymer sample (black) and with the addition of 0.5 mg/L (red),
10 mg/L (blue) and 20 mg/L (green) chromium(VI): The analysis is linear over the entire determination range.

Extension is possible through varying the sample amount as well as the dilution and injection volume. Column: Metrosep A Supp 5 - 150/4.0; eluent: 10 mmol/L Na2CO3,
1 mmol/L NaHCO3, 0.7 mL/min; sample volume: 20 μL; sample amount: 5 g finely ground polymer in 1000 mL Na2CO3/NaOH solution. Post-column derivatization with 1,5- diphenylcarbazide.