Bulletin of Environmental Contamination and Toxicology 2015-06-01

Determination of N,N-dimethyldodecylamine and N,N-dimethyloctadecylamine in river and sea water using liquid chromatography tandem mass spectrometry.

Hiroko Tsukatani, Kazuhiro Tobiishi

Index: Bull. Environ. Contam. Toxicol. 94 , 801-6, (2015)

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Abstract

We developed a selective method for determining N,N-dimethyldodecylamine (DMDA) and N,N-dimethyloctadecylamine (DMOA) concentrations in river and sea water samples using liquid chromatography/tandem mass spectrometry (LC/MS/MS). DMDA and DMOA are suspected to be toxic, and DMDA is categorized as a "Class I Designated Chemical Substance" under the "Act on Confirmation, etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion of Improvements to the Management Thereof" in Japan. The analytes are extracted from a water sample using solid phase extraction and the extract is evaporated and dissolved in 1 mL methanol for LC/MS/MS analysis. We analyzed DMDA and DMOA in real water samples and found that the analyte peaks were resolved effectively. The method detection limits for DMDA and DMOA were 4.7 and 0.80 ng/L, respectively.

Related Compounds

  • Acetone
  • sodium sulfate
  • Hydrochloric acid
  • Methanol
  • Formic Acid
  • Octyldimethylamine
  • Phthalic acid

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