摘要:

New data are presented for the analysis of the elements: REE, Na20, Fe2O3, Cr, Co, Rb, Cs, Ba, Hf, Ta, Th and Il in twenty‐five less well known carbonate and industrial geological reference materials by instrumental neutron activation analysis. The materials include NBS 1c, 15e, 88a and 120b from the National Bureau of Standards, Washington DC; GFS 400‐403, 405, 407, 411, 412, 415 and 417 carbonate materials from George Fredrick Smith, Columbus, Ohio and BCS 267, 269, 309, 315, 319, 367, 368, 375, 376, 381 and 382/1 from the Bureau of Analysed Samples, Middles‐borough, Cleveland, UK. Particular attention has been given to the correction of interferences due to the fission of uranium in the determination of the elements La, Ce, Nd a

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00445.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

A simultaneous multi‐element method is described for the determination of six elements of importance in geochemical investigations of mineralization processes in granites. After a mixed acid sample digestion, the elements Be, Li, Nb, W, Mo and Sn are determined by inductively coupled plasma spectrometry. Possible sources of bias due to incomplete sample dissolution and from spectral interferences were investigated. Analysis of 16 geological reference standard samples and a number of enriched samples demonstrates the accuracy and precision of the method for the study of mineralized granites and for several other geochemical sample types as wel

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00446.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

Fluorine content has been determined non destructively in eighty international geochemical reference samples (GRS) including rocks, soils, sediments, minerals and ores, by proton induced gamma ray emission spectrometry (PIGE) using the nuclear reaction19F(p,αγ)16O. Under our operating conditions, the detection limit is around 25 ppm. Our analytical results are compared with the presently preferred values when available or with other published data. The general agreement between this work and reported values is reasonably good. The present paper includes results on several GRS for which existing data are rather scarce or even inexistan

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00447.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

Data on three Japanese geochemical reference samples (JR‐1, JA‐1, and JB‐2) are presented. Ten major and thirty‐five trace element concentrations were determined using x‐ray fluorescence, instrumental thermal neutron activation, thermal neutron capture prompt gamma‐ray spectrometry, delayed neutron assay, automated thermal neutron activation analysis, inductively coupled plasma emission, atomic absorption, and ion selective electrode. Good agreement between the various methods and with recent literature values were obtained using error weighted mean concentrations for

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00448.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

Les résultats d'un grand nombre de dosages de potassium et d'argon effectués sur des échan tillons standards sont présentés; les âges K‐Ar correspondant sont également calculés. Il s'agit d'une part de standards géochronologiques: la muscovite Berne 4M, la biotite LP6 et la phonolite MZ, d'autre part de standards géochimiques diffusés par le CRPG: la biotite Mica‐Fe, la phlogopite Mica‐Mg et

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00449.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

27 reference samples have been analysed for Cl by automated photometric analysis following alkali fusion. The results are in general agreement with the compilation values listed. However, it is apparent that in the case of the six USGS samples included, values are generally lower than those previously quoted for photometric determinations, particularly for G‐2 and AGV

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00450.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

New mean values for up to 11 major and minor and up to 11 trace elements in soils SO‐1 to SO4 have been calculated by two procedures. Analytical results received by CCRMP subsequent to the certification program of 1979 were included. In one instance, the same procedure as used for certification wherein all results except those rejected on chemical and/or statistical considerations was followed, but little improvement over the 1979 calculations was obtained. The other procedure is proposed by the authors for use in identifying concentration range intervals wherein maximum interlaboratory consensus is observed. The application of this procedure has permitted the certification of the four soils for the content of 24 elements not previously certifie

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00451.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

Twenty‐two geochemical reference standards obtained from the U.S. Geological Survey (AGV‐1, PCC‐1, G‐2, GSP‐1, BHVO‐1, MAG‐1, QLO‐1, RGM‐1, SCo‐1, SDC‐1, SGR‐1, STM‐1, BIR‐1, DNC‐1, W‐2, Nod A‐1, Nod P‐1), the National Bureau of Standards (SRM 278 Obsidian, SRM 688 Basalt), the International Atomic Energy Agency (Soil‐5, SL‐1 Lake Sediment), and Batelle Pacific Northwest Laboratories (COS‐1 Oil Shale) have been analyzed for up to twenty‐one major, minor, and trace elements from the group of H, B, C, N, Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Mn, Fe, Co, Ni, Cu, Cd, Nd, Sm and Gd. The technique used, in‐beam neutron‐capture prompt γ‐ray activation analysis (PGAA), is described and

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00452.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

The Canadian Certified Reference Materials Project reports recommended values of lead‐210 activity in four uranium reference materials previously certified for uranium and radium‐226. Eleven laboratories participated in the interlaboratory program for DL‐1a, BL‐4a, DH‐1a and BL‐5; three measurement techniques were applied. Procedural and instrumental calibrations were performed with a certified lead solution from Amersham International Corp., thereby establishing traceability of the recommended values for lead‐210. Activity ratios for uranium‐238. radium‐226 and lead‐210 demonstrate these uranium reference materials to be in secular equilibrium, within experim

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00453.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1985.tb00454.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY