1 26 Al investigations at the AMS-laboratory in Lund M. Faarinen 1 , C.-E. Magnusson 1 , R. Hellborg 1 , S. Mattsson 2 , M. Kiisk 1 , P. Persson 1 and A. Schütz 3 1) Department of Physics, Lund University, Sölvegatan 14, SE-223 62 Lund, Sweden. mikko.faarinen@nuclear.lu.se 2) Department of Radiation Physics, Malmö University Hospital, SE-205 02 Malmö. 3) Section of Occupational and Environmental Medicine, University Hospital, SE-221 85 Lund, Sweden. Abstract At the Accelerator Mass Spectrometry (AMS) laboratory in Lund, a facility for 26 Al analysis is under development. The sensitivity is expected to be several orders of magnitude higher than with standard mass spectrometry. The planned biomedical program includes studies of aluminium uptake, distribution and retention in man. The initial work has been concentrated on the construction and testing of a new dedicated injector for the accelerator and on the preparation of biological samples for alumin- ium analysis. The current quality of the facility is presented and the first experimen- tal results reported. Keywords: accelerator mass spectrometry, AMS, aluminium Introduction During the past two decades, accelerator mass spectrometry (AMS) has been devel- oped to allow measurements of as few as a million of atoms of a specific nuclide in