These would react with barium ions in the test, giving an incorrect positive result. Explain why, in a test for halide ions, the sample is acidified with dilute nitric acid first. Carbonate ions ...

Würzburg chemists have succeeded in controlling the passage of halide ions by deliberately introducing defects into a two-layer nanographene system. Their results have been published in Nature.

Researchers at the University of Adelaide have discovered that a protein which mediates the transport of alkali metal ions, ...