Seasonal variations of natural organic matter (NOM) in surface water supplied to two coal-fired power stations

Thorough Validation of Optimized Size Exclusion Chromatography-Total Organic Carbon Analysis for Natural Organic Matter in Fresh Waters

“…This has been proven by Ruhl et al (2012), who investigated the elution behavior of a large set of low MW acid compounds with LC-OCD-OND and showed that their elution occurs over the entire humic substances peak and not only in the shoulder, which is denoted as the low MW acid peak [23,24]. LC-OCD-OND has been applied in various studies to investigate the performance of drinking water treatment processes and/or to assess the impact of altering NOM characteristics in the source water on these processes [25][26][27][28], e.g., MacKeown et al (2021) found a correlation between trihalomethane formation potential and the concentration of building blocks in the water [26]. A drawback of LC-OCD-OND is that its implementation and data interpretation are still relatively complex, which impedes its use in routine analysis.…”

“…The efficiency of the degassing unit to remove IC was therefore investigated using IC standards. The standards ranged between 2.5 and 80 mgC dm −3 and were prepared using Na 2 CO 3 (5,15,25,40,60, 80 mgC dm −3 ) or K 2 CO 3 (2.5, 7.5, 10, 20, 30, 50, 70 mgC dm −3 ) in MilliQ. The standards were measured with the Shimadzu TOC V CPN to determine the exact IC concentration of the prepared standards and with the HPSEC-TOC system to determine the amount of IC that was not removed by the degassing unit.…”