Summary
The potential use of the activating effect of Pb(II) on the Mn(II)-catalysed oxidation of Tiron by hydrogen peroxide in the presence of 1,10-phenanthroline for the simultaneous determination of the two metals was investigated. The results obtained allowed the development of a new kinetic photometric method for the simultaneous determination of Pb(II) and Mn(II). The catalysed reaction was monitored by the initial rate method, which was applied to absorbance-time curves. Different Mn(II) concentrations were used to construct calibration graphs by plotting the slopes of the photometric curves obtained against the Mn(II) concentration at each Pb(II) concentration assayed. A new calibration graph was obtained in terms of the Pb(II) concentration from the slopes of such graphs. By applying the standard-addition method to the sample to be assayed a third graph was obtained, the slope and intercept of which provided the analytical concentration of Pb(II) and Mn(II), respectively. The optimized values of the different variables involved were used to determine Mn(II) and Pb(II) over the concentration ranges 1–5 and 200–800 ng/ml, respectively.
Similar content being viewed by others
References
Mottola HA (1974) Anal Chim Acta 71:443
Nikolelis DP, Hadjiioannou TP (1979) Rev Anal Chem 81
Pérez-Bendito D, Silva M (1988) Kinetic methods in analytical chemistry, Chap 3. Ellis Horwood, Chichester
Igov RP, Jaderic MD, Pecev TG (1980) Talanta 27:361
Moreno A, Silva M, Pérez-Bendito D, Valcárcel M (1983) Analyst 108:85
Tanaka M, Funahashi S, Shirai K (1967) Anal Chim Acta 37:437
Moreno A, Silva M, Pérez-Bendito D, Valcárcel M (1983) Talanta 30:107
Rubio S, Gómez-Hens A, Valcárcel M (1984) 109:717
Grases F, Forteza R, March JG, Cerdà V (1983) Anal Chim Acta 155:299
Otto M, Rentsch J, Werner G (1983) Anal Chim Acta 147:267
Yamane T, Fukasawa T (1977) Bunseki Kagaku 26:300
Anderson RG, Brown BC (1981) Talanta 28:365
Babko A, Dubovenko L, Terletskaya A (1966) Ukr Khim Zh 32:1326
Dolmanova IF, Zolotova GA, Mazko TN (1977) Zh Analit Khim 32:1025
Rubio S, Gómez-Hens A, Valcárcel M (1984) Analyst 109:597
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cladera, A., Caro, A., Gómez, E. et al. A new kinetic photometric method for the simultaneous determination of metals based on catalytic and activating effects. Fresenius J Anal Chem 342, 322–326 (1992). https://doi.org/10.1007/BF00322178
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00322178