conductivity of the material metal powders were added to the samples either before the interaction with the lewis acid or after the vacuum drying of the prepared material metals tested for this purpose included but are not restricted to silver titanium and cobalt the use of titanium during the reaction with a strong lewis acid promoted the inclusion of the hydrogen in the sample within the finished material the finished material was pressed into sample holders which were placed in the cesium sputter source of the llnl ams facility in order to reduce the thermal deposition into the sample the ion source was operated at a relatively low cathode potential of 2 5 4 kv relative to the extraction potential negative carbon atom ion currents equal to 25 to 45 of those available from prepared filamentous graphite were extracted from the ion source these ion beams were analyzed using normal ams techniques the method of this invention has been used to determine the relationship between carcinogen dose and dna adduct levels in mice given very low levels of 2 amino 3 8 dimethylimidazo 4 5 f quinoxaline meiqx fig1 a carcinogen found in cooked meat this study illustrates the dynamic range sensitivity and general applicability of ams technology to problems in biomedical and environmental dosimetry as well as presenting the relationship between dna adducts and low.