Continuous-flow method for the determination of total trihalomethane formation potential in waters

✍ Scribed by Toyoaki Aoki; Kouji Kawakami

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 336 KB
• Volume: 261
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)80210-x

✦ Synopsis

A double-tube separation system with an Inner tube of nucroporous PTFE and an outer tube of PTFE IS proposed for the contmuous determmatlon of tnhalomethanes (THMs) m waters The THMs m the sample, after reactlon unth sodium hypochlonte solution at 98°C and reducmg the residual hypochlonte with sodium sulphlte, are separated wth the double-tube system at 50°C They are then mured mth alkaline mcotmannde solution and heated at 98°C After coolmg m an ice-bath, the reaction product IS fed to a spectrofluoruneter and the emwlon of fluorescence excited at 372 nm IS measured at 467 nm The response was obtamed wrlthm 20 mm The detection hnut (signal-to-noise ratio = 3) was 2 2 kg I-' The total THM formation potential obtamed by the present method for lake and river waters were m good agreement vvlth those obtamed by the Japanese standard batch method