The accurate measurement of the oil consumption of combustion engines is a very challenging analytical problem. In this thesis a new method has been developed, allowing the precise determination of the sulfur content of exhaust gases. With the known sulfur fraction of the oil and the use of using sulfur free gasoline, the oil consumption can be calculated. In this method, the sulfur containing compounds get selectively and quantitatively oxidized to sulfur dioxide in a nonthermal plasma. The sulfur dioxide is then detected with selective laser-induced-fluorescence spectroscopy in the ppb-range. The performance has been demonstrated in numerous laboratory experiments and finally by measurements at an engine test site.
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The accurate measurement of the oil consumption of combustion engines is a very challenging analytical problem. In this thesis a new method has been developed, allowing the precise determination of the sulfur content of exhaust gases. With the known sulfur fraction of the oil and the use of using sulfur free gasoline, the oil consumption can be calculated. In this method, the sulfur containing compounds get selectively and quantitatively oxidized to sulfur dioxide in a nonthermal plasma. The su...
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