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1.
Concentration data on 74 individual constituents in CCRMP (Canadian Certified Reference Materials Project) soils SO-1, SO-2, SO-3, and SO-4 have been collected from 83 journal articles and technical reports. These data are summarized in consensus (mean) values with uncertainties expressed as one standard deviation. Mean values are also calculated as a function of analytical procedure and all raw data are given in the tables. Recommended values are proposed based upon data criteria used by NIST (National Institute of Standards and Technology, formerly the National Bureau of Standards or NBS). 相似文献
2.
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 certified. 相似文献
3.
Boron concentration data on 69 different biological, coal and geological reference materials issued by NBS, USGS and CCRMP have been collected from 1951-1986. Data from 135 journal articles and technical reports are included. These data are summarized in consensus (mean) values with uncertainties expressed as pm one standard deviation. Mean values are also calculated as a function of analytical procedure and all raw data are given in the tables. 相似文献
4.
Fifteen geochemical reference samples have been analysed for palladium using the stable isotope dilution technique. These include seven USGS, five CRPG and three CCRMP samples. Our results ape in reasonable agreement with the presently accepted values for the USGS samples, but are significantly lower than the present CCRMP values. Our data for the CRPG samples are the first to be published. This is the first reported study of the determination of palladium in silicate samples using the isctope dilution technique. 相似文献
5.
S.R. Joshi 《Geostandards and Geoanalytical Research》1987,11(2):199-201
Lead-210, radium-226, thorium-228 and uranium-238 concentrations have been determined in five CCRMP reference samples using direct gamma-ray spectrometry. Literature data are available for only lead-210 and radium-226 levels in these samples. 相似文献
6.
John Lynch 《Geostandards and Geoanalytical Research》1999,23(2):251-260
Provisional values related to element concentration derived from partial extractions as well as some additional total concentration data are reported for eight CCRMP sediment reference materials. These values are intended to supplement previously published data for these samples. The partial extractions for which data are reported include dilute HNO3 - dilute HCl, concentrated HNO3 -concentrated HCl and concentrated HNO3 -concentrated HClO4 . 相似文献
7.
A brief outline is given of the approach used in the Canadian Certified Reference Materials Project (CCRMP) to prepare and certify reference ores and related materials. Recommended values and 95 % confidence intervale are tabulated for selected constituents in 18 reference materials. Future plans of the CCRMP are outlined also. 相似文献
8.
Thorium-230 concentrations have been determined in 11 CCRMP (Canadian Certified Reference Materials Project) reference rock and ore samples using alpha spectroscopy following a chemical separation of the thorium. Literature data are available for only one of these 11 reference samples. 相似文献
9.
Ernest S. GLADNEY Wanita EBERHARDT Richard J. PETERS 《Geostandards and Geoanalytical Research》1982,6(1):5-6
Radium-226 concentrations have been determined in 11 CCRMP reference rock and ore samples using instrumental gamma-ray spectrometry and radiochemical radon emanation procedures. Results are compared to the best available data. 相似文献
10.
Publication patterns of NBS, USGS and CCRMP reference materials data are traced over the past 35 years by literature source, analytical methods employed, and constituents measured. 相似文献
11.
W.S. BOWMAN G.H. FAYE R. SUTARNO J.A. McKEAGUE H. KODAMA 《Geostandards and Geoanalytical Research》1979,3(2):109-113
Four reference soils have been prepared and certified through the cooperation of Energy, Mines and Resources Canada and Agriculture Canada. Their origin and details of preparation and characterization are presented. Thirty-six laboratories participated in the international certification program by providing approximately 16000 results for 65 elements. One or more of the reference soils were certified for 18 elements and preliminary data were obtained for another 47. 相似文献
12.
Twenty-four geochemical reference samples have been analysed far barium using the stable isotope dilution technique. These include five CRPG, ten ANRT, six Nimroc and two CCRMP samples together with the Tonalite from Tanzania, Duplicate analyses have been made in each case and our values for barium are believed to be accurate to approximately 3 %. In general, our results are in good agreement with the published data except for Nimroc samples where our data are consistently lower than the presently accepted values. No evidence of sample inhomogeneities was observed in the present work. 相似文献
13.
Ernest S. GLADNEY David B. CURTIS Daniel R. PERRIN 《Geostandards and Geoanalytical Research》1984,8(1):43-46
Concentrations of boron in 35 silicate reference materials are measured by thermal neutron capture gamma-ray spectrometry. Results are compared for NBS, USGS, and CCRMP reference materials with values from the literature. The use of two prompt gamma facilities at Los Alamos are discussed. 相似文献
14.
Eleven rare earth elements (REE) have been determined in ten USGS and two CCRMP igneous rock standards using high performance ion chromatography. Duplicate analyses of two or more separately prepared aliquots of each sample were undertaken; reproducibility was better than 5% for each of the REE. In most cases, the results compare closely with published REE values for those samples for which the REE are well characterised. Where the results for individual elements are in disagreement with published data, the more erratic patterns yielded by the earlier data when plotted on chondrite-normalised REE diagrams suggest that values determined in this study are of greater accuracy. 相似文献
15.
Joy G. SEN GUPTA 《Geostandards and Geoanalytical Research》1994,18(1):111-122
Elemental compostions of six CCRMP (TDB-1, WGB-1, UMT-1, WPR-1, WMG-1 and WMS-1) and one IWG (ZW-C) geochemical candidate reference materials were determined by XRF, ICP-AES, ICP-MS, GFAAS and other modern instrumental techniques. Inter-method results compared favourably in the case of elements for which multiple data were available. 相似文献
16.
Twenty-eight geological reference samples have been analysed for selenium using atomic absorption spectrometry with hydride generation and quartz cell atomizer and/or with solvent extraction and carbon tube atomizer. Data are presented for 5 CCRMP, 6 USGS, 3 NBS, 6 NIM and 8 GSJ reference materials. 相似文献
17.
Determination of Selenium in Twenty Geological Reference Materials by Neutron Activation And Inorganic Ion Exchange 总被引：1，自引：0，他引：1
Twenty geological reference samples have been analyzed for selenium using thermal neutron activation followed by radiochemical separation of 75 Se. Data are presented for 3 NBS, 11 USGS, and 6 CCRMP materials. 相似文献
18.
Total carbon and inorganic carbon were determined by coulometric titration for 18 National Bureau of Standards (NBS) Standard Reference Material (SRM) and 4 Canadian Certified Reference Project Standards (CCRMP). A wide range of carbon contents was represented in the samples, which included biological, geological, and environmental materials. The analytical data produced helps fill gaps in the available literature for total and inorganic carbon values. 相似文献
19.
H.F. STEGER G.H. FAYE W.S. BOWMAN R. SUTARNO 《Geostandards and Geoanalytical Research》1979,3(2):173-175
Under the Canadian Certified Reference Mate-vials Project (CCRMP), four new ore reference materials, one uranium ore BL-5 and three sulphide concentrates (CCV-1, CPB-1 and CZN-1) have been recently issued. The preparation, characterization and certification of these samples are briefly presented. 相似文献
20.
Publication patterns of CCRMP, NIST, and USGS reference materials are traced over the past 40 years by literature source, analytical method employed, and constituents measured. This is the first update to our 1987 paper which covered the period 1951 - 1985. 相似文献