Authors : J.K. Tubonimi Ideriah , A. Solomon Braide , O. Herbert Stanley and B. Collins Osaisai
Abstract: Lead concentrations in soil, leaves and crop samples were determined with Atomic Absorption spectrophotometric and Diphenylthiocarbazone colorimetric methods. Results for lead concentrations as determined by the 2 methods were linear, yielding the regression equation: Y = 2.2096+1.0345x, where Y was the concentration of lead determined by the AAS method and x was that determined with the Dithizone colorimetric method. Both methods proved to be good as the correlation (r = 0.9939) and squared correlation coefficient (R2 = 0.9879) between lead levels obtained by the two methods were high. The instrumental method has proven to be fast and simple. However, the Dithizone colorimetric method produces satisfactory result and is sensitive, less expensive and recommended or the analysis of heavy metals in environmental samples.
J.K. Tubonimi Ideriah , A. Solomon Braide , O. Herbert Stanley and B. Collins Osaisai , 2007. A Comparison of Methods of Analysis for Lead in Environmental Samples . Environmental Research Journal, 1: 9-11.