Simple and reliable determination of arsenic in water

The usual spectroscopic methods (ICP-MS, AAS) for the determination of toxic arsenic in drinking water are either very expensive or challenging to use. An alternative method that is much easier to use and much less expensive at the same time is voltammetric determination with the scTRACE Gold. This new, screenprinted sensor can be used without any preparation; measuring results are available after only 10 minutes on average, and the detection limit for arsenic is well below the 10 µg/L stipulated by the latest legislation in the US and the EU.

The scTRACE Gold is simply plugged in the electrode shaft; as there is no preconditioning required, users can start measuring immediately after. The new sensor is maintenance-free. Once the measuring performance of the scTRACE Gold starts to deteriorate (as it is the case with any electrode), the inexpensive sensor is simply exchanged. This ensures reliable results at all times.

Another benefit of voltammetric measurements with the scTRACE Gold is the ability to discriminate between different oxidation states of arsenic, notably the highly toxic As(III) and the less toxic As(V). The scTRACE Gold can be used with any Metrohm voltammetry measuring stand.

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