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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
Determination of Multiple Trace Element Compositions in Thin (> 30 ?m) Layers of NIST SRM 614 and 616 Using Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS)
Wiley - Tập 29 Số 1 - Trang 107-122 - 2005
Tomoaki Morishita, Yoshito Ishida, Shoji Arai, M. Shirasaka
Determination of Forty Two Major and Trace Elements in USGS and NIST SRM Glasses by Laser Ablation‐Inductively Coupled Plasma‐Mass Spectrometry
Wiley - Tập 26 Số 2 - Trang 181-196 - 2002
Shan Gao, Xiaomin Liu, Honglin Yuan, Bodo Hattendorf, Detlef Günther, Liang Chen, Shenhong Hu
Forty two major (Na, Mg, Ti and Mn) and trace elements covering the mass range from Li to U in three USGS basalt glass reference materials BCR‐2G, BHVO‐2G and BIR‐1G were determined using laser ablation‐inductively coupled plasma‐mass spectrometry. Calibration was performed using NIST SRM 610 in conjunction with internal standardisation using Ca. Determinations were also made on NIST SRM 6...... hiện toàn bộ
Phân Tích Định Lượng Đối Tượng Vi Lượng Trong Mẫu Địa Chất Sử Dụng Phương Pháp Tiêm Dòng Và Nhúng Tầng Áp Suất Thấp Kết Hợp Với ICP-MS: Nghiên Cứu Về Các Vật Liệu Tham Chiếu Địa Hóa BR, DR-N, UB-N, AN-G Và GH Dịch bởi AI
Wiley - Tập 25 Số 2-3 - Trang 187-198 - 2001
Jean Carignan, Pascal Hild, Guy Mevelle, Jacques Morel, Delphine Yeghicheyan
Chúng tôi mô tả các quy trình phân tích cho việc xác định các nguyên tố vi lượng được phát triển tại CNRS Service d'Analyse des Roches et des Minéraux (SARM) và báo cáo kết quả thu được cho năm vật liệu tham chiếu địa hóa: bazan BR, điôrit DR‐N, serpentinit UB‐N, anorthosit AN‐G và granit GH. Kết quả cho các nguyên tố đất hiếm, U và Th cũng được báo cáo cho các vật liệu tham chiếu khác bao...... hiện toàn bộ
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
1989 COMPILATION OF WORKING VALUES AND SAMPLE DESCRIPTION FOR 272 GEOSTANDARDS
Wiley - Tập 13 Số s1 - Trang 1-113 - 1989
K. Govindaraju
In this special issue, working values are reported for 272 international geostandards along with sample description. For many geostandards, the number of compiled data were not adequate enough for assigning working values. Users of geostandards are solicited to contribute more and more data particularly on trace elements. Think Geostan is a slogan that we wish to launch to set this problem...... hiện toàn bộ
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