摘要:

Two rock samples from the San Marcos Gabbro and the Lakeview Mountain Tonalite of the Southern California Batholith were prepared as U.S. Geological Survey reference samples. These samples were chosen to supply reference data for rocks having intermediate silica contents in the range of 45‐60 percent. Unpublished data by members of the U.S. Geological Survey and some published data are summarized, and provisional estimates of the major and minor oxide and traceelement contents are give

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00816.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

Nine reference materials, recently distributed by the Geological Survey of Japan (JA‐1, JB‐la, JB‐2, JB‐3, JG‐la, JGb‐1, JP‐1, JR‐1 and JR‐2) have been analysed by instrumental neutron activation analysis using well proven experimental techniques. Results for the twenty elements determined (selected rare earth elements, Fe, Ba, Co, Cr, Cs, Hf, Rb, Sc, Ta, Th and U) are assessed for accuracy and precision and show good agreement with previous

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00817.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

The arsenic and antimony contents of 85 geochemical reference samples have been determined by atomic absorption spectrometry with hydride generation and heated quartz cell atomizer. The sample is decomposed with a mixture of perchloric, nitric and hydrofluoric acids and potassium permanganate solution; interferences are eliminated by addition of potassium iodide, aluminium chloride and ascorbic acid. The agreement between the present results and published data is fairly good.

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00818.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

The carbonate‐carbon (CO2) content of forty‐one geochemical reference samples has been determined by coulometric method following acid treatment of the sample for releasing CO2. The method is superior to the conventional methods in speed, accuracy, sensitivity, specificity, and the coverage of CO2range. The results on NBS limestone samples agree well with the certified values. The precision of the method is 0.5 % r.s.d., and the practical detection limit is 10 pp

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00819.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

Experimental data for eleven rare‐earth elements (REE) obtained by inductively coupled plasma spectrometry (ICP) in five French geochemical reference standards (BE‐N, BR, DR‐N, GS‐N and FK‐N)are presented. The method is based on acid digestion of the sample and cation‐exchange separation from matrix elements.Together with these new determinations an updated compilation of these reference materials are presented. Good agreement between the present results and previously preferred and published values obtained by various analytical techniques is observed. The values obtained in the present work corroborate the validity of the outl

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00820.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

Une méthode spectrométrique d'émission atomique à plasma conductif a été appliquée pour l'analyse multiélementaire des échantillons USGS GXR‐1 à 6. Cette méthode permet de déterminer simultanément 22 éléments: Ag, As, B, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Nb, Ni, P, Pb, Sb, Sn, V, W, Y et Zn, au niveau de traces (ppm) et le Fe en (%). Les résultats obtenus démontrent une bonne concordance avec les valeurs pré

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00821.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

Using the compiled analytical data for the constituents of four Canadian iron‐formation reference samples, a comparison is made among nine different “robust” estimators of “true” value, including the median, median, Gastwirth median, trimean, quarter‐trimmed and sixthtrimmed means and the three Hampel estimators. Individual estimators and combinations of them are compared by means of the summation and “iron‐oxide compatibility” tests. Comparisons are also made with values derived by the “select l

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00822.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

Gold and palladium have been determined in 42 geological reference samples with graphite furnace AAS after aqua regia digestion and SnCl2‐Hg extraction. A brief discussion on the quality of these analyses also is presente

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00823.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

Analytical data of rare earth elements (REEs) are presented for six new standard rock samples (JB‐2, JB‐3, JR‐1, JR‐2, JA‐1, and JGb‐1) issued by the Geological Survey of Japan. These data have been simultaneously determined by inductively coupled plasma atomic emission s

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00824.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

The 20 ore and concentrate reference materials originally issued by the Institute of Geological Sciences (as it then was) in 1977 have been reevaluated using robust as opposed to classical statistical techniques. The opportunity has also been taken to correct minor errors and to incorporate any new data. One material, the nickel concentrate, IGS 20, has been withdrawn due to incipient oxidation. A total of 24 elemental concentrations in the remaining 19 samples have received revised values.

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1986.tb00825.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY