caa a22 4500 465746470 CHVBK 20180323111822.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00322549 doi (NATIONALLICENCE)springer-10.1007/BF00322549 Enrichment of trace amounts of gold, silver, palladium and platinum by precipitate flotation [Elektronische Daten] [Xiaojun Wu, Shu-Chuan Liang] Summary: An organic precipitant, p-dimethylaminobenzilidenerhodanine (DABR), is used as the gatherer in precipitate flotation to enrich trace amounts of gold, silver, palladium and platinum from acidic media in the presence of surfactants. The DABR dissolved in dimethylformamide (DMF) does not affect the determination of the enriched metals with electrothermal atomic absorption spectrometry. The presence of a 102- to 104-fold excess of other usual ions does not interfere with the flotation owing to the high selectivity of DABR for the noble metals in acidic media. As little as 1 ng/l of gold in aqueous solution can thus be determined by AAS. The method has been applied to determine the noble metals in various ore samples with satisfactory results. Springer-Verlag, 1990 Wu Xiaojun Academia Sinica, Institute of Chemistry, 100080, Beijing, People's Republic of China aut Liang Shu-Chuan Academia Sinica, Institute of Chemistry, 100080, Beijing, People's Republic of China aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/2(1990-01-01), 120-123 0937-0633 336:2<120 1990 336 216 https://doi.org/10.1007/BF00322549 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00322549 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wu Xiaojun Academia Sinica, Institute of Chemistry, 100080, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Liang Shu-Chuan Academia Sinica, Institute of Chemistry, 100080, Beijing, People's Republic of China aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/2(1990-01-01), 120-123 0937-0633 336:2<120 1990 336 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer