Abstract
The applicability and performance of the TXRF method for the analysis of sample materials from the oil refining and chemical industries were studied. One objective of the study was to develop rapid analytical procedures for the determination of elements present as traces in size fractionated diesel emission particles, in raw materials of resin production (ureas and phenols) and in trouble-shooting samples. Another goal was to determine the real, rather than the ideal, detection limits for the various applications. Absolute detection limits for most elements found in size fractionated diesel emission particles were below 1 ng. Relative detection limits determined for trace elements in ureas were between 5 and 30 μg kg−1. Only the values for P, S and Ca exceeded this range. Additionally, remarkable differences in trace elements below 1 mg kg−1 could be detected between five commercial ureas. © 1997 Elsevier Science B.V.
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