Zhang J, Wang Y, Xu X, Yang X. Specifically colorimetric recognition of calcium, strontium, and barium ions using 2-mercaptosuccinic acid-functionalized gold nanoparticles and its use in reliable detection of calcium ion in water. Analyst. 2011 Oct 07;136(19):3865–8. doi: 10.1039/c1an15175d. PMID: 21829822.
Specifically colorimetric recognition of calcium, strontium, and barium ions using 2-mercaptosuccinic acid-functionalized gold nanoparticles and its use in reliable detection of calcium ion in water