Unlike the other tests described on this page, the test for carbonate ions works whatever acid is added. Explain why, in a test for sulfate ions, the sample is acidified with hydrochloric acid first.

If a mixture of ions is present, some of the flame colours may not be clearly visible. For example, the yellow colour from sodium ions is very intense and tends to hide the paler lilac colour from ...

Researchers have developed a biosensor 1 capable of simultaneously detecting very low concentrations of nitrate and nitrite ions (nitric oxide metabolites) in human plasma, blood and saliva samples, ...

(Nanowerk News) A new study published in Chemosensors ("All-Solid-State Potentiometric Sensor Based on Graphene Oxide as Ion-to-Electron Transducer for Nitrate Detection in Water Samples") introduces ...

Nitrate ion is a common pollutant produced by municipal waste treatment systems, agricultural run-offs, and livestock waste. Although an essential component of fertilizers and necessary for growing ...