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1988 COMPILATION REPORT ON TRACE ELEMENTS IN SIX ANRT ROCK REFERENCE SAMPLES: DIORITE DR‐N, SERPENTINE UB‐N, BAUXITE BX‐N, DISTHENE DT‐N, GRANITE GS‐N AND POTASH FELDSPAR FK‐N
Wiley - Tập 13 Số 1 - Trang 5-67 - 1989
K. Govindaraju, I. Roelandts
The six ANRT rock reference samples (DR‐N, UB‐N, BX‐N, DT‐N, GS‐N, FK‐N) have been distributed as reference samples for nearly twenty years. All available data on trace elements in these samples are presented and evaluated. It has been possible to assign working values for nearly 40 trace elements. These samples prepared in 600 to 1300 kg quantities are expected to last for some decades to...
DETERMINATION OF TWELVE TRACE ELEMENTS IN TWENTY‐SEVEN AND TEN MAJOR ELEMENTS IN TWENTY‐THREE GEOCHEMICAL REFERENCE SAMPLES BY X‐RAY FLUORESCENCE SPECTROMETRY
Wiley - Tập 16 Số 2 - Trang 301-309 - 1992
Surendra P. Verma, Thomas Besch, Mirna Guevara, B. Schulz‐DOBRICH
This study reports the results of twelve trace elements in twenty‐seven International geochemical reference samples (IGRS) (15 from Japan, 7 from South Africa, 4 from France and 1 from U.S.A.). Similarly, ten major elements were also determined in twenty‐three GRS (15 from Japan, 5 from South Africa, 2 from France and 1 from U.S.A.). Whenever possible, the results are compared with literat...... hiện toàn bộ
Determination of Selenium Concentration in Sixty Five Reference Materials for Geochemical Analysis by GFAAS after Separation with Thiol Cotton
Wiley - Tập 25 Số 2-3 - Trang 317-324 - 2001
Luc Marin, Jitka Lhomme, Jean Carignan
Selenium has been determined in sixty five geological reference materials of different origins by graphite furnace atomic absorption spectrometry. Samples were decomposed with a mixture of nitric and hydrofluoric acids. Selenium was reduced to SeIV with hydrochloric acid, and then fixed and separated from the matrix on thiol cotton. After digestion of the thiol cotton ...... hiện toàn bộ
SIMULTANEOUS DETERMINATION OF THIRTY‐SEVEN TRACE ELEMENTS IN TWENTY‐EIGHT INTERNATIONAL ROCK STANDARDS BY ICP‐MS
Wiley - Tập 17 Số 1 - Trang 81-97 - 1993
Dieter Garbe‐Schönberg
Thirty‐seven trace elements, including rare‐earth elements, have been determined by ICP‐MS in twenty‐eight international rock standards using routine sample preparation techniques. Samples were decomposed by either pressurized HF‐HCIO4‐aqua regia attack, or by lithium borate fusion. Generally, the ICP‐MS data for geological rock standards presented here agree well with...... hiện toàn bộ
Suppression of Matrix Effects in ICP‐MS by High Power Operation of ICP: Application to Precise Determination of Rb, Sr, Y, Cs, Ba, REE, Pb, Th and U at ng g‐1 Levels in Milligram Silicate Samples
Wiley - Tập 21 Số 2 - Trang 307-319 - 1997
Akio Makishima, Eizo Nakamura
We found that the suppression of signals for 88Sr, 140Ce and 238U in rock solution caused by rock matrix in ICP‐MS (matrix effects) was reduced at high power operation (1.7 kW) of the ICP. To make the signal suppression by the matrix negligible, minimum dilution factors (DF) of the rock solution for Sr, Ce and U were 600, 400 a...... hiện toàn bộ
1995 WORKING VALUES WITH CONFIDENCE LIMITS FOR TWENTY‐SIX CRPG, ANRT AND IWG‐GIT GEOSTANDARDS
Wiley - Tập 19 Số s1 - Trang 1-32 - 1995
K. Govindaraju
Working values for the twenty‐six CRPG, ANRT and IWG‐GIT geostandards are presented, with 95% confidence limits. In addition, the hundreds of geoanalysts who have contributed data on these reference samples are presented, with their country of origin.
A SELF‐CONSISTENT COMPILATION OF ELEMENTAL CONCENTRATION DATA FOR 93 GEOCHEMICAL REFERENCE SAMPLES
Wiley - Tập 20 Số 2 - Trang 217-245 - 1996
R. L. Korotev
Concentration data obtained by instrumental neutron activation analysis (INAA) are presented for up to 36 chemical elements in 93 geochemical reference samples, including some for which there are little previous data. Because all data are based on at least three independent analyses, and for many of the data the uncertainty associated with counting is an insignificant source of error, the ...... hiện toàn bộ
SECOND REPORT (1993) ON THE FIRST THREE GIT‐IWG ROCK REFERENCE SAMPLES: ANORTHOSITE FROM GREENLAND, AN‐G; BASALTE D'ESSEY‐LA‐CÔTE, BE‐N; GRANITE DE BEAUVOIR, MA‐N
Wiley - Tập 17 Số 2 - Trang 227-294 - 1993
K. Govindaraju, I. Roelandts
The first report (1980) on the three samples, Anorthosite AN‐G, Basalt BE‐N and Granite MA‐N resulted in the chemical characterization of major, minor and 30 trace elements. The present report confirms the validity of a great majority of these working values, in addition to presenting working values for 20 more trace elements for each sample. Only compiled data on trace elements are presen...... hiện toàn bộ
Evaluation of Geochemical Reference Standards by X‐Ray Fluorescence Analysis
Wiley - Tập 11 Số 1 - Trang 107-113 - 1987
Allen Stork, David K. Smith, James B. Gill
Twenty five elements in twenty six geochemical reference standards analyzed by X‐ray fluorescence spectrometry yield major and trace element concentrations close to consensus values. Ninety percent of our analyses agree with consensus values for standards to within pm 0.5 to 1.5 relative percent for major elements and pm 3 to 5 relative percent or pm 1‐3 ppm, whichever is higher, for trace...... hiện toàn bộ
Multi‐Element Analysis of 15 International Standard Rocks by Isotope‐Dilution Spark Source Mass Spectrometry
Wiley - Tập 14 Số 3 - Trang 469-473 - 1990
Klaus Peter Jochum, H. Seufert, M.F. Thirlwall
The concentrations of 25 trace elements have been determined in 15 international standard rock samples by isotope‐dilution spark source mass spectrometry (ID‐SSMS). This technique yields reliable data down to the ppb concentration range. The agreement between most of our data and recommended values is within 10%. However, for reference samples with low trace element contents (BIR‐1, NIM‐N,...... hiện toàn bộ
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