摘要:

Brief description of nineteen sediment reference samples (OO series), analytical methods employed and certified values for major, minor and trace element are presented.

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00099.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Data are presented for eight rare earth elements and ten other elements in 22 reference samples recently distributed by the University of Liege (Belgian sedimentary rock reference samples), the Geological and Mining Service (Suriname), the Geological Survey of Japan and the Venezuelan laterite. Determinations were made using a well characterised, high precision, neutron activation analysis technique.

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00100.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Isotope dilution mass spectrometry has been used to measure copper, zinc, cadmium and lead in the marine sediments SD‐M‐2/TM and BCSS‐1 and dogfish muscle DORM‐1. The measured values for the metals in the latter two materials are in agreement with the certified values except for zinc where the certified values are slightly higher. Sample SD‐M‐2/TM, which has only recently become available, has a composition similar, although not identica

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00101.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Thirteen geochemical reference standards have been analysed for lithium by a technique originally developed for assay of lithium in biological materials. The technique consists of thermal neutron irradiation, then measurement of3He from decay of3H produced via the reaction6Li(n, α)3H. The results are compared with literature values

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00102.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Platinum and palladium contents of sixty‐eight geochemical reference samples have been determined by graphite furnace atomic absorption spectrometry after digestion of sample with aqua regia and hydrofluoric acid and extraction of platinum and palladium as iodides by methylisobutylketone (MIBK). The data are compared with those from other studies and crustal abundance

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00103.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

This study reports the results of thirteen rare‐earth elements in thirty geochemical reference samples. Three alkali (K, Rb, Cs) and two alkaline earth (Sr, Ba) elements were also determined in eighteen reference samples. The analytical procedure involved is based on spiked samples and later measurement of the rare‐earth elements by high‐performance liquid chromatography and the alkalies and alkaline earths by thermo‐quartz mass spectrometric isotope dilution (THQ‐MSID). Whenever possible, the results are compared with literatu

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00104.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

The planned procedure for developing two reference samples, coal ash from the Kansk‐Achinsk basin, ZUK‐1, and silt from Lake Baikal, BIL‐1, is desc

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00105.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Rare earth data for nine well‐known geochemical reference samples were obtained using a rapid and efficient cation exchange chromatographic separation procedure. It involves the use of a mixed‐acid eluent (HCI and HNO3) on a 15 x 1 cm column of Bio‐Rad AG50–X8 (200–400 mesh) to remove matrix and many trace elements from rock solutions. The rare earth elements are removed from the column using 60 ml 7M HNO3. The pre‐concentration procedure described is routinely used in this laboratory for the determination of the rare earth elements by mass spectrometry‐isotope dilution, and has been satisfactorily used for their determination using inductively‐coupled plasma‐source atomic emis

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00106.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

A routine method for the direct determination of Au and associated trace metals in sulfides has been developed for use with a low‐flux nuclear reactor (SLOWPOKE II Reactor Facility, University of Toronto). Small samples (100–200 mg) are analysed simultaneously for Au, Ag, As, Sb, Mo, Co, Se, Cd, Fe, and Zn. Sulfides containing finely divided gold can be analysed with a high degree of precision and yield results which agree closely with commercial fire assay‐atomic absorption analyses for Au. Favourable comparisons with other analytical techniques (flameless atomic absorption and emission spectrometry) are also indicated for Ag, As, and Sb. Neutron activation has the advantage of providing precise and accurate results for these elements without chemical separation or preconcentration. Analyses of 10 sulfide‐bearing reference materials from CANMET, Ottawa are compared with published best values for selected trace metals inclu

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00107.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

Trace level determination of nickel in silicate rock samples has been achieved using secondary ion mass spectrometry (SIMS) with kinetic energy filtering. Standard rock references, issued by the Geological Survey of Japan, were fused into glass and used as standards for the SIMS analysis. Due to interferences from the glass matrix, the secondary ion of mass 60 was only useful for Ni, although the secondary ion was interfered mainly by CaO+. The contributions of these molecular ions were deconvolved by a least squares regression. Good linear correlation between results after the deconvolution and the Ni concentration in the glass standards was obtained. The uncertainties of the SIMS analysis depend strongly on the degree of contribution of CaO+ molecular ion. Such a method of SIMS analysis is especially useful to study the detailed behavior of Ni on a micro‐scale in Ca‐poor materi

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1991.tb00108.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY