Rhodium in car exhaust tips by total automatic activation analysis |
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Authors: | F Grass G P Westphal H Lemmel J Sterba |
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Institution: | (1) Atomic Institut Vienna, Stadionallee 2, A-1020 Vienna, Austria |
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Abstract: | Exhaust systems of modern cars contain catalysts for the reduction of CO, NOx and hydrocarbons. These catalysts are made of ceramic materials with a large surface on which platinum metals catalyse the
oxidation. The catalysts contain approximately 2 g of platinum and 0.4 g of rhodium. Recently platinum is being replaced by
palladium. During driving the platinum-group elements (PGEs) are expelled from the tip in fine particles and are deposited
in the environment. For a projected study of emissions from cars driven on streets and highways it is important to know which
elements can be measured by short time activation analysis without any chemical procedure. |
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