A Study on the Development of Analytical Method for Trimethyl (octadecyl) Ammonium and it’s Salts in Sediment by LC-MS/MS, and the Change of its Concentrations Over the Years

Trimethyl (octadecyl) ammonium and it's salts is widely used as a cationic surfactant. In this study, an analytical method for trimethyl in sediment by liquid chromatography tandem-mass spectrometry (LC-MS/MS) was developed. method, measured chloride. The detection limit (MDL) quantification (MQL) were 0.00026 μg/g-dry 0.00069 μg/g-dry, respectively. This able to measure the organic or inorganic-rich sediments, which had been difficult with conventional methods. addition hydrophobic adsorption of on matter, electrostatic inorganic matter also observed. It detected sediments at Yamagata Prefecture, considered be relatively less polluted chemical substances. substances both rivers sea areas Nagoya City, found higher concentrations than that Prefecture. all City after 2003, means its continuous pollution City.