title: Determination of aliphatic amines by gas chromatography-mass spectrometry after in-syringe derivatization with pentafluorobenzoyl chloride.
abstract: A simple and highly sensitive gas chromatographic method has been developed for the determination of low molecular weight short-chain aliphatic amines (SCAAs) after their simultaneous extraction and in-syringe derivatization with pentafluorobenzoyl chloride (PFBOC). Derivatization of the low molecular weight aliphatic amines in bicarbonate buffer of pH 10.5 with PFBOC was followed by immersed solvent microextraction. Derivatization conditions, including reagent concentration, reaction pH, ionic concentration of buffer, reaction time, stirring rate, reaction temperature and extraction solvent, have been investigated for method optimization. Linearity was studied within range of 0.15 pg ml⁻¹-50 ng ml⁻¹. The correlation coefficients were between 0.9934 and 0.9999. Detection limit of derivatized amines proved to be in the range of 0.117-1.527 pg ml⁻¹, and the intraday and interday relative standard deviation (RSD) values were less than 8% with respect to peak area. The method was applied for analysis of lake, river and industrial waste water. The recoveries of extraction from lake, river and industrial waste water samples, which have been spiked with different levels of aliphatic amines, were in the range of 68-99%, 63-102% and 62-105%, respectively.
authors.affiliation: Advanced Materials and Processes Research Institute, Bhopal 462026, India.
authors.forename: Deepesh Kumar
authors.initials: DK
authors.lastname: Singh
authors.forename: Sunil Kumar
authors.initials: SK
authors.lastname: Sanghi
authors.forename: Sorna
authors.initials: S
authors.lastname: Gowri
authors.forename: Navin
authors.initials: N
authors.lastname: Chandra
authors.forename: Shail Bala
authors.initials: SB
authors.lastname: Sanghi
mesh_terms: D000588:Amines / Q000737:chemistry*; D001565:Benzoates / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D015394:Molecular Structure; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D005464:Fluorobenzenes; D005466:Fluorocarbons
chemical_list: D000588:Amines; D001565:Benzoates; D014874:Water Pollutants, Chemical; C014737:pentafluorobenzoyl chloride; D005464:Fluorobenzenes; D005466:Fluorocarbons