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Comparison of chemical oxygen demand and total organic carbon for the determination of organic carbon content in water
 Tobolková, Eva ; Načeradská, Jana (advisor) ; Novotná, Kateřina (referee)
Chemical oxygen demand (COD) and total organic carbon (TOC) are determinations that are used to summarize the organic pollution of waters. However, these determinations do not provide the same information about the content of organic substances in waters. COD is an oxidation method and different substances react differently to this determination. TOC is more accurate as an indicator of organic pollution. Therefore, their ratio will be different for waters with different compositions. This work focuses on evaluating the advantages and disadvantages of determining COD and TOC and comparing their ratios in waters with different compositions. The goal of the work was also to determine whether it is appropriate to introduce coefficients for converting COD and TOC for different types of water. Based on the literature search, it was found that the determination of TOC provides more accurate information on the content of organic pollution in all types of water. The determination of COD by the dichromate method is important for wastewater, mainly due to the estimation of the proportion of degradable pollution. The COD/TOC ratio for municipal waters is relatively stable due to their similar composition, and the determination of the conversion coefficient is possible. This does not apply to industrial...
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