Novel method for the qualitative identification of chromium ions (III) using l-aspartic acid stabilized CdS quantum dots

In this study, l -aspartic acid stabilized CdS quantum dots (L-Asp-CdS QDs) were synthesized via a one-step hydrothermal method and used for the qualitative identification of Cr 3+ . Cr 3+ could be identified rapidly based on the formation of precipitated floccules using this method. Qualitative assessment indicated the resistance of this method to interference from various metal ions and it can be applied over a wide pH range with a qualitative determination limit of 1 μM. Moreover, we demonstrated that the L-Asp-CdS QDs can be employed for the practical detection of Cr 3+ in water samples.