IN-SITU DETECTION OF TRIETHANOLAMINE IN PORTLAND-CEMENT BY LASER-DESORPTION AND MATRIX-ASSISTED LASER-DESORPTION IONIZATION FOURIER-TRANSFORM ION-CYCLOTRON RESONANCE MASS-SPECTROMETRY

The present study is devoted to the enhanced detection of grinding aid s (e.g. triethanolamine) in Portland cement, especially in its four ma jor constitutive pure mineral phases. The method utilized was laser de sorption Fourier transform mass spectrometry without any preconcentrat ion step. It is shown that triethanolamine can be accurately detected at a dosage as low as ca, 150 ppm, (C) 1997 by John Wiley & Sons, Ltd.