Modulares Polarisationsspektrometrie-Geraet zur Multielement-Wasser-Analyse Weiterentwicklung und Erprobung. Schlussbericht

Abstract

The aim of the project was the development of an apparatus for multielement determination in drinking water analysis via the polarization-spectroscopic effect of coherent forward scattering in combination with a continuum source. It should basically provide fast and simultaneous detection of several elements and a modular principle of construction by using a user-definable configuration. The modular design offers a low-cost version for smaller users as well as an advanced version with simultaneous multielement capability and with options for electrothermal as well as with flame atomization. In particular, the realized advantageous features were the capability for simultaneous multielement-determination without the need to change the light source, a wide analytical working range by measuring on strong and weak element resonance lines and simultaneous determination of trace elements together with main constituents of high concentrations. With the new concept of beam guidance via modern, aspheric off-axis-reflectors and the use of new home-made, chromatic corrected Glan-polarizers, significant improvement was achieved compared with former devices, so that simultaneous multielement-determination (over the full spectral detection range) is possible by now. The computer controlled instrument was calibrated with nonlinear functions by means of multielement reference solutions, and then tested with real water samples. The results were compared with these of standard methods (e.g. AAS) by interchanging of samples with other institutes. (orig./HK)Available from TIB Hannover: F94B1426+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman