摘要:

The Canadian Certified Reference Materials Project announces recommended values for radium‐226 activity in four reference materials previously certified for uranium. Thirteen laboratories participated in the interlaboratory program for DL‐la, DH‐la, BL‐4a and BL‐5. Four measurement techniques were applied. Procedural and instrument calibrations were performed with certified radium solutions from the National Bureau of Standards, thereby establishing traceability of the recommended values for radium‐226 in DL‐la, DH‐la, BL‐4a and BL‐5. These reference ores are also shown to be close to, if not in, radi

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1984.tb00411.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

The study of three marine sediments is the first in a series of reference samples to be developed for characterizing the bottom sediments of the Pacific Ocean and the Red Sea. The three samples were certified for their contents of major, minor and some trace elements. These values were assigned on the basis of statistical processing of the data obtained from an interlaboratory experiment conducted with the use of physical, physico‐chemical and chemical methods of analysis. The Soviet, Czechoslovakian and Bulgarian laboratories took part in the interlaboratory experimen

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1984.tb00412.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

The Canadian Certified Reference Materials Project announces the availability of reference uranium tailings sample UTS‐1, ‐2, ‐3 and ‐4. Eighteen laboratories participated in the interlaboratory program for total iron, titanium, aluminium, calcium, barium, uranium, thorium, total sulphur, sulphate and arsenic. Eight laboratories participated in the inter‐laboratory program for thorium‐230, radium‐226, lead‐210 and polonium‐210 in all four samples and for thorium‐232, radium‐228 and thorium

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1984.tb00413.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

Iron (II) oxide in silicate rocks can readily be measured after digestion with HF and HCl by reaction with KI and KIO3. The iodine produced during the digestion is trapped in CCl4and measured at 512 nm spectrophotometrically. Results for ten accepted and two new geochemical reference standards are presented.

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1984.tb00414.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

Two reference samples, Albite AL‐I and Iron Formation sample IF‐G were analysed for their chemical composition by the International Working Group “Analytical Standards of Minerals, Ores and Rocks” (GIT‐IWG). AL‐I was processed in 189 kg and IF‐G and 760 kg. 103 GIT‐IWG laboratories participated in this collaborative study along with 171 geoanalysts. This study lasted 15 months (September 1982 ‐ December 1983) and is the second undertaken by the GIT‐IWG. Over 2400 units of data were collated. As a result of this international study, the major and minor elements have been well characterized in both the samples; however, more data on trace elements will be very welcome for a better definition of trace elements, although working values have been proposed for about forty trace elements in each sample. The first and the second collaborative studies undertaken by GIT‐IWG demonstrate well the immense analytical pot

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1984.tb00415.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1984.tb00416.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

ISSN:0150-5505    

DOI:10.1111/j.1751-908X.1984.tb00417.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY