Determination of platinum in enviromental and geological samples by radiochemical neutron activation analysis

✍ Scribed by D. Wildhagen; V. Krivan

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 895 KB
• Volume: 274
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)80474-y

✦ Synopsis

A radmchenucal neutron activation analysis technique was developed for the determmatlon of traces of platinum m enwonmental and geological samples yla the indicator radtonuchde lwAu, based on the separation of gold on polyurethane foam from 1 M HCl In the determmatlon of platmum at the ng g -' level m the presence of antimony at concentrations higher than about 5 kg g-', owmg to a slight co-retention of antunony, further decontammatlon of the mdlcator radlonucbde fractton was necessary The effect of neutron flux and rrradlatlon tnne on the extent of the second-order mterfermg reaction 197Au(n,r)1gsAu(n,r)1wAu and the effect of the gold content on the limit of detection of platinum are considered m detail The feaslbdlty of this technique was tested by the analysis of enwonmental and geologtcal samples, and the results obtained were compared with those of other methods Keywords Neutron actlvatlon methods, Radmchemlcal methods, Environmental samples, Geological matenals, Since the mtroductlon of catalytic cleamng of automobile exhaust gases, platmum has become a new pollutant of the environment For the determmatlon of the platinum baseline levels m the environment and of possible health hazards, rehable and efficient analytlcal methods for the determination of this element m a wide variety of samples are reqmred There are a number of methods for the determmatlon of platinum m various environmental samples at concentrations down to 0 1 ng g-l Several graphite furnace atormc absorption spectrometrlc (GFAAS) procedures have been reported [l-5], of which that by Eller et al [4]