The urea sensors, however, do not detect anions in aqueous solutions. Like the thiourea sensors, the urea sensors change color from yellow to purple on complexation with any of the three anions.

Aluminate: An aluminium-containing anion typically derived from aluminium hydroxide in a strongly alkaline aqueous solution. Raman Spectroscopy: A vibrational spectroscopic technique utilised to ...

Anion sensing and detection in aqueous media have emerged as fundamental challenges and opportunities in environmental monitoring, biomedical diagnostics and industrial process control.

The most common methods used to prepare solid sodium aluminate utilise an initial step to give an aqueous sodium aluminate solution. Solid sodium aluminate is yielded by drying. In this work by ...