摘要:

Five geochemical reference samples. Granite GA and Basalt BK from CRPG, Diorite DR‐N and Serpentine UB‐N from ANRT and Andesite AGV‐1 from USGS were analysed for their rare‐earth element (REE) contents. All the fourteen REE were determined using neutron activation analysis. The results are presented and compared with publish

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1978.tb00208.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

Thirty‐three reference samples from the United States Geological Survey (USGS), Centre de Recherches Pétrographiques et Géochimiques (CRPG, France), Association Rationale de la Recherche Technique (ANRT, France), National Institute for Metallurgy (NIM, South Africa), Geotechnic Institute (GI, Austria), Mineralogical Institute of Basel and Bern (Switzerland), Zentrales Geolo‐gisahes Institut (ZG1, DDR) and from the For‐chungeinstitut der Zementinduatrie (Düsseldorf, GDF) were analysed for their fluorine and total water content. Fluorine was determined, after pyrohydrolysis, with an ion‐selective electrode. Total water was determined, after pyrolysis, by Karl‐Fischer titration. Our values, five determinations on each sample, are compared with the pref

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1978.tb00209.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

Ion exchange chromatography is extremely well suited for the complete or partial separation of trace and ultra‐trace elements from rooks and minerals. Selective methods are described for the separation of traces of lithium, beryllium, vanadium, uranium, strontium, barium, sodium, potassium and rare earth elements, and their determination in rook samples. The methods are especially useful for accurate standardization work. Some typical elution curves and results for the concentration of these trace elements in the six South African NIM‐rock standards and some international standard rocks are presen

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1978.tb00210.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

La présente étude porte essentiellement sur les propriétés statistique des poudres de roches.Nous montrons que les méthodes d'analyse employant des prises d'essai trop faibles peuvent faire entrer une incertitude notable dans les résultats finaux.Afin d'estimer ce genre d'erreur dans quelques roches communes, nous avons appliqué une methode simple d'expérimentation basée sur I‘analyse par activation n

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1978.tb00211.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

Most trace elements in ultrabasic rock samples are very often present in concentration levels of less than 10 ppm. In these cases, neutron activation analysis (NAA) is very useful. We have applied two different NAA procedures for the determination of 19 trace elements and CaO in two ultrabasic rock standards. Our values are compared with the preferred and published values, although the latter are not very abundant.

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1978.tb00212.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

Six rock reference samples (granite, syenite, lujavrite, norite, pyroxenite, dunite) in 250 kg quantities were prepared by the National Institute for Metallurgy (NIM) in 1966. Analytical data contributed by co‐operating laboratories for minor and trace elements in these NIMROC samples since then are presented here.Relevant statistical data are briefly presented; recommended values are given for those elements for which the number of results and their quality are reasonably acceptable. A brief description is also given of the procedures that were used in the estimation of these recommended values but for more details, the original NIM Report No. 1945, dated February 28, 1978 should be consulte

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1978.tb00213.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1978.tb00214.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY