An automated instrument was used to perform simplex optimization of reagents and single-reagent continuous variations in the gallic acld-H202-0Hsystem for the analytes Co(II), Ag(I), Mn(II), Pb(II), Cd(II), and Ni(II). Definitely separated reagent optima were located for Ag(I) (gallic acid = 37 mM, H202 = 895 mM, OH" = 1000 mM) and Co(II) (gallic acid = 37 mM, H202 = 895 mM, OH" = 100 mM). The observed emission intensity for a mixture of these analytes Is equal to the sum of the emission Intensities for the separate analytes. Working curves were constructed for each analyte at each optimum. These curves were used to calculate analyte concentrations for mixtures of Ag(I) (3 X 10"6-8 X 10 s M) and Co(II) (1 X 10*-3 X 10-* M).Solution chemiluminescence (CL) methods are sensitive, low cost methods for a variety of organic and inorganic ana-
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.