The determination of TOC for 38 aquatic sediments samples and two Certified Reference Materials (CRM),
indicated a very good correlation (R2>0.967) between the wet oxidation – titration method and the high temperature
catalytic combustion oxidation - infrared method. Although the Wakley and Black method was developed in 1934 it
seems to be still applicable for a quick estimation of the TOC but with some limitations in the concentration range.
The analysis of the CRM materials supports the above assumption and with the titration method to be more accurate
in low concentrations while for sediments with higher organic load the catalytic combustion method gives better
results.