title: Separation and enrichment of palladium and gold in biological and environmental samples, adapted to the determination by total reflection X-ray fluorescence.
abstract: The reductive co-precipitation of trace and ultra-trace elements together with mercury followed by complete evaporation of the mercury makes it possible to determine palladium and gold by total reflection X-ray fluorescence. Both elements can be detected without interferences at optimal sensitivity in the pg range. Thus, detection limits of, e.g., 2.5 ng L-1 for palladium and 2.0 ng L-1 for gold, in urine, were obtained. The precision was determined to 0.04 at a palladium concentration of about 200 ng L-1 urine and to 0.19 at a gold concentration of only 18 ng L-1. The recovery for a urine sample spiked with known amounts of palladium and gold amounted to > 95%. Results of the combined procedure are given for the determination of palladium and gold in the urine of non-exposed and occupationally exposed persons and in some other environmentally relevant samples.
authors.affiliation: Institute of Spectrochemistry and Applied Spectroscopy (ISAS), Dortmund, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Messerschmidt
authors.forename: A
authors.initials: A
authors.lastname: von Bohlen
authors.forename: F
authors.initials: F
authors.lastname: Alt
authors.forename: R
authors.initials: R
authors.lastname: Klockenkämper
mesh_terms: D004785:Environmental Pollutants / Q000032:analysis; D006046:Gold / Q000652:urine*; D006801:Humans; D016273:Occupational Exposure; D010165:Palladium / Q000652:urine*; D013052:Spectrometry, X-Ray Emission / Q000379:methods
chemical_list: D004785:Environmental Pollutants; D010165:Palladium; D006046:Gold