Solid-phase extraction-gas chromatography and solid-phase extraction-gas chromatography-mass spectrometry determination of corrosion inhibiting long-chain primary alkyl amines in chemical treatment of boiler water in water-steam systems of power plants.
Gas chromatography with simultaneous flame-ionization detection (FID) and a nitrogen-phosphorus detection (NPD) as well as gas chromatography-mass spectrometry (GC/MS) has been used to characterize long-chain primary alkyl amines after derivatization with trifluoroacetic anhydride (TFAA). Electron impact ionization- (EI) and negative chemical ionization (NCI) mass spectra of trifluoroacetylated derivatives of the identified tert-octadecylamines are presented for the first time. The corrosion inhibiting alkyl amines were applied in a water-steam circuit of energy systems in the power industry. Solid-phase extraction (SPE) with octadecyl bonded silica (C18) sorbents followed by gas chromatography were used for quantification of the investigated tert-octadecylamines in boiler water, superheated steam and condensate samples from the power plant. The estimated values were: 89 microg l(-1)(n = 5, RSD = 7.8%), 45 microg l(-1) (n = 5, RSD = 5.4%) and 37 microg l(-1)(n = 5, RSD = 2.3%), respectively.
Fachhochschule Bonn-Rhein-Sieg, University of Applied Sciences, Department of Applied Natural Sciences, von-Liebig-Str. 20, D-53359 Rheinbach, Germany. peter.kusch@fh-brs.de
Peter
P
Kusch
Gerd
G
Knupp
Marcus
M
Hergarten
Marian
M
Kozupa
Maria
M
Majchrzak
D000588:Amines / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D011210:Power Plants; D013227:Steam; D014874:Water Pollutants, Chemical / Q000032:analysis*
D000588:Amines; D013227:Steam; D014874:Water Pollutants, Chemical