Publications Details
Trace identification of organic molecules in ultrapure water using ion mobility spectroscopy
This paper describes our initial investigations to determine the suitability of Ion Mobility Spectrometry (IMS) as an on-line, real-time monitor for ultrapure water systems. We have found that acetone, ethylene glycol, isopropanol, chloroform, and n-methyl pyrrolidone (NMP) can be detected at parts-per-million levels or lower using this technique. As expected, surfactants, such as dodecylsulfate sodium salt, dodecyl-trimethylammonium bromide, and hexadecyl trimethylammonium bromide were not detected. Several sample introduction schemes are proposed for continual monitoring of ultrapure water (UPW) streams.