Comparative study of effluent generation of wetway methods - Walkley Black and dry way - LECO equipment - in analysis of total organic carbon determination - TOC in 5 different types of solid samples

Abstract

One of the most commonly used methods for determining total organic carbon (TOC) content is dry. In some cases, however, the method is not possible due to specific sample conditions, such as the high tendency to combustion. Samples with such characteristics when inserted in the equipment go into instant combustion, making it impossible to read properly. Thus, the Walkley Black Method, by the wet route, becomes a viable alternative. In this sense, the objective of the research was to study and compare the results and effluent generation of dry way methods, by LECO equipment and wet pathway method, Walkley Black, in 4 types of solid samples. The RESULTS of TOC by wet and dry way methods were similar for 4 of the 5 samples. In the evaluation of the effluents generated, the analysis by the LECO equipment generated a smaller amount of effluents than by the Walkley Black method, besides having a easiest treatment.