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Determination of methylamines and trimethylamine-N-oxide in particulate matter by non-suppressed ion chromatography
An ion chromatography method with non-suppressed conductivity detection was developed for the simultaneous determination of methylamines (methylamine, dimethylamine, trimethylamine) and trimethylamine-N-oxide in particulate matter air samples. The analytes were well separated by means of cation-exchange chromatography using a 3mM nitric acid/3.5% acetonitrile (v/v) eluent solution and a Metrosep C 2 250 (250mmx4mm i.d.) separation column. The effects of the different chromatographic parameters on the separation were also investigated. Detection limits of methylamine, dimethylamine, trimethylamine, and trimethylamine-N-oxide were 43, 46, 76 and 72μg/L, respectively. The relative standard deviations of the retention times were between 0.42% and 1.14% while the recoveries were between 78.8% and 88.3%. The method is suitable for determining if methylamines and trimethylamine-N-oxide are a significant component of organic nitrogen aerosol in areas with high concentration of these species.
Erupe, Mark E.
Silva, Philip J.
Malloy, Quentin G.J.
Cocker, David R.
Purvis-Roberts, Kathleen L.
ion exchange chromatography
Journal of chromatography. A 2010 Mar. 26, v. 1217, no. 13
Amsterdam; New York: Elsevier
Journal Articles, USDA Authors, Peer-Reviewed
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