In order to achieve reliable and reproducible analysis of biological materials by SIMS it is critical both that the chosen specimen preparation method does not modify substantially the in-vivo chemistry that is the focus of the study and that any chemical information obtained can be calibrated accurately by selection of appropriate standards. In Oxford we have been working with our new Cameca N...

The physical and chemical properties of the materials are generally determined by their microstructure and main components. In this paper, the Hap/Cs-Cmc composite materials with different mass ratios were prepared for the first time through liquid co-precipitation method. The microstructure, phase and performance of the composite materials were investigated by FT-IR, XRD, TG-DTA, SEM, and EDS ...

Possibilities for harmonising controls on the radioactivity of building materials within the European Union are being discussed in a Working Party on Natural Radiation Sources established by the Article 31 Group of Experts (Euratom Treaty). The Working Party is preparing a document to aid the Article 31 Expert Group and the European Commission in considering possible recommendations and technic...

To meet high expectations concerning precision and accuracy of reference materials, preparation of matrix-free reference materials using thermal decomposition-gas chromatography-mass spectrometry (TD-GC-MS) was proposed in this study. In the paper, the results obtained in preparation of the new reference materials for benzene and toluene are presented, based on the thermal decomposition techniq...

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Two preparation methods (wet saturation impregnation with vanadyl acetylacetonate and ball-milling of γ-Al2O3 with crystalline V2O5) were applied to produce two sets of VOx/γ-Al2O3 catalysts with increasing vanadium loadings. Materials from both sets were characterized by XRD, SEM, Raman, TPR and UV/Vis-DRS to elucidate the influence of the preparation method on the morphology of VOx species an...