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Research and Services - John de Laeter Centre The John de Laeter Centre provides quantitative data used to understand processes of Earth and planetary evolution, characterise the nature of resources and materials ... ARSENIC AND ARSENIC COMPOUNDS (EHC 224, 2001) 1. SUMMARY 1.1 Properties and analytical procedures. Arsenic is a metalloid widely distributed in the earth's crust and present at an average concentration of 2 mg/kg. Google Even more » Account Options. Sign in; Search settings    Read More

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