Determination of trace concentrations of cobalt(II) and other metals by the chemiluminescent oxidation of gallic acid

Determination of picomolar levels of cobalt in seawater by flow injection analysis with chemiluminescence detection

“…CL methods based on the oxidation of organic compounds such as luminol (9), lucigenin (10), and lophine (11) by alkaline hydrogen peroxide have been used to determine cobalt. The CL produced during the oxidation of gallic acid (3,4,5-trihydroxybenzoic acid) in the presence of Co(II) is a particularly sensitive technique for the determination of cobalt (12)(13)(14)(15). Yamada et al (15) have shown that it is possible to determine Co(II) directly in water with a detection limit of 10 pM by this method in an FIA system.…”

Insights into the ninhydrin chemiluminescent reaction and its potential for micromolar determination of human serum albumin

“…Cu(II), Co(II), Ni,(II), Cd(II)) catalyze the CL emission of the lucigenin-H 2 O 2 , gallic acid-H 2 O 2 , luminol-H 2 O 2 and the ninhydrin-H 2 O 2 systems [7,[10][11][12]. On the other hand, it is well known that Cu(II), Co(II), Ni(II) and many other ions bind to HSA [13,14] which may result in a decrease in the catalytic activity of the ions in the corresponding CL reaction.…”

On-line column preconcentration for the determination of cobalt in sea water by flow-injection chemiluminescence detection

“…showed a significant enhancement by addition of Mn and vitamin B in field culture experiments [2]. For the determination of cobalt, in general, luminol [3,4], lucigenin [5,6], lophine [7,8], tiron [9] and gallic acid [10,11] are used as CL reagents, the flow-system using gallic acid has a high sensitivity and little interferences by other trace metals [12][13][14].…”