Abstract

PEREZ, Walter H.; CASTILLO, Elianna  and  AGREDA, Jesús A.. DEVELOPMENT OF FLOW INJECTION ANALYSIS METHODS BY CLASSICAL PROCEDURES: Determination of Pb in water. Rev.Colomb.Quim. [online]. 2011, vol.40, n.1, pp.47-64. ISSN 0120-2804.

Chemical analysis has evolved towards automation to satisfy the current requirements: fast analysis and certainty in the results. Flow injection analysis (FIA) is a way to reach automation. This work presents the necessary steps to obtain an optimized FIA methodology for the determination of Pb(II) in water by classic methods. The result was a FIA method to determinate Pb with dithizone (chromogenic agent) dissolved in iso-propyl alcohol, using cethyltrimethylammonium bromide (CTAB) to solubilize the complex. The main characteristics of the method were: injection sample volume 81.7 µL, flow 8.0 mL/min, spectra acquisition time 1.4 s and linear range 1 to 40 mg L^-1.

Keywords : Flow-injection analysis (FIA); Pb(II)-Dithizone complex; cethyltrimethylammonium bromide (CTAB); flow injection methods implementation.

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