Silicon isotope abundance ratios and atomic weights of NBS-28 and other reference materials

2005 ◽  
Vol 69 (23) ◽  
pp. 5487-5494 ◽  
Author(s):  
T. Ding ◽  
D. Wan ◽  
R. Bai ◽  
Z. Zhang ◽  
Y. Shen ◽  
...  
Keyword(s):  
Reference Materials ◽  
Silicon Isotope ◽  
Isotope Abundance

Calibrated sulfur isotope abundance ratios of three IAEA sulfur isotope reference materials and V-CDT with a reassessment of the atomic weight of sulfur

2001 ◽  
Vol 65 (15) ◽  
pp. 2433-2437 ◽  
Author(s):  
T. Ding ◽  
S. Valkiers ◽  
H. Kipphardt ◽  
P. De Bièvre ◽  
P.D.P. Taylor ◽  
...  
Keyword(s):  
Reference Materials ◽  
Sulfur Isotope ◽  
Atomic Weight ◽  
Isotope Abundance

Silicon isotope amount ratios and molar masses for two silicon isotope reference materials: IRMM-018a and NBS28

2005 ◽  
Vol 242 (2-3) ◽  
pp. 319-321 ◽  
Author(s):  
S. Valkiers ◽  
T. Ding ◽  
M. Inkret ◽  
K. Ruße ◽  
P. Taylor
Keyword(s):  
Reference Materials ◽  
Silicon Isotope

scholarly journals Silicon Isotope Analyses of Soil and Plant Reference Materials: An Inter‐Comparison of Seven Laboratories

2021 ◽  
Author(s):  
Camille Delvigne ◽  
Abel Guihou ◽  
Jan A. Schuessler ◽  
Paul Savage ◽  
Franck Poitrasson ◽  
...  
Keyword(s):  
Reference Materials ◽  
Silicon Isotope ◽  
Isotope Analyses

Re-assessment of silicon isotope reference materials using high-resolution multi-collector ICP-MS

2006 ◽  
Vol 21 (3) ◽  
pp. 266 ◽  
Author(s):  
Ben C. Reynolds ◽  
R. Bastian Georg ◽  
Felix Oberli ◽  
Uwe Wiechert ◽  
Alex N. Halliday
Keyword(s):  
High Resolution ◽  
Reference Materials ◽  
Silicon Isotope ◽  
Icp Ms

Silicon Isotope Compositions of Soil and Sediment Reference Materials Determined by MC‐ICP‐MS

2021 ◽  
Author(s):  
Zhen Zeng ◽  
Yu‐Fang Sun ◽  
Hao‐Ye Tang ◽  
Guo‐Xing Lu ◽  
Lin Yang ◽  
...  
Keyword(s):  
Reference Materials ◽  
Silicon Isotope ◽  
Icp Ms ◽  
Soil And Sediment

Layered and ion implantation specimens as possible reference materials for the electron-probe microanalysis

1992 ◽  
Vol 50 (2) ◽  
pp. 1652-1653
Author(s):  
G. Remond ◽  
R.H. Packwood ◽  
C. Gilles ◽  
S. Chryssoulis
Keyword(s):  
Ion Implantation ◽  
Reference Materials ◽  
Analytical Techniques ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
X Ray ◽  
Spatially Resolved ◽  
Analytical Expressions ◽  
Original Approach ◽  
Depth Concentration

Merits and limitations of layered and ion implanted specimens as possible reference materials to calibrate spatially resolved analytical techniques are discussed and illustrated for the case of gold analysis in minerals by means of x-ray spectrometry with the EPMA. To overcome the random heterogeneities of minerals, thin film deposition and ion implantation may offer an original approach to the manufacture of controlled concentration/ distribution reference materials for quantification of trace elements with the same matrix as the unknown.In order to evaluate the accuracy of data obtained by EPMA we have compared measured and calculated x-ray intensities for homogeneous and heterogeneous specimens. Au Lα and Au Mα x-ray intensities were recorded at various electron beam energies, and hence at various sampling depths, for gold coated and gold implanted specimens. X-ray intensity calculations are based on the use of analytical expressions for both the depth ionization Φ (ρz) and the depth concentration C (ρz) distributions respectively.

Development of reference materials with the composition of propyl and isopropyl alcohol solutions

2020 ◽  
pp. 66-72
Author(s):  
Irina A. Piterskikh ◽  
Svetlana V. Vikhrova ◽  
Nina G. Kovaleva ◽  
Tatyana O. Barynskaya
Keyword(s):  
Reference Materials ◽  
Measurement Errors ◽  
Isopropyl Alcohol ◽  
Certified Reference Materials ◽  
Toxic Substances ◽  
Biological Objects ◽  
Margin Of Error ◽  
Measurement Results ◽  
And Control ◽  
Characteristic Mass

Certified reference materials (CRM) composed of propyl (11383-2019) and isopropyl (11384-2019) alcohols solutions were created for validation of measurement procedures and control of measurement errors of measurement results of mass concentrations of toxic substances (alcohol) in biological objects (urine, blood) and water. Two ways of establishing the value of the certified characteristic – mass consentration of propanol-1 or propanol-2 have been studied. The results obtained by the preparation procedure and comparison with the standard are the same within the margin of error.

Problems of ensuring metrological traceability of measurement results of indicators of quality for food products and food raw materials

2020 ◽  
pp. 64-70
Author(s):  
Mariya Y. Medvedevskikh ◽  
Anna S. Sergeeva
Keyword(s):  
Reference Materials ◽  
Mass Fraction ◽  
Nutritional Value ◽  
Animal Feed ◽  
Raw Materials ◽  
Meat Products ◽  
Metrological Traceability ◽  
Food Products ◽  
Freeze Dried ◽  
Measurement Results

The article raises the problem of ensuring metrological traceability of the measurement results of indicators of quality and nutritional value for food products and food raw materials: water (moisture), nitrogen (protein, crude protein), fat, ash and carbohydrates. The problem under consideration can be solved by applying reference materials of food composition, traceable to state primary measurement standards GET 173-2017 and GET 176-2019 and primary reference measurement procedures (PRMP), for attestation of measurement procedures and accuracy checking of measurement results. The article discusses the results of the PRMP development of mass fraction of fat, ash and carbohydrates in food products and food raw materials, as well as mass fraction of crude fat (oil content) in oil crops seeds and products based on them. The paper also presents metrological characteristics of reference materials of composition of dry dairy products, grain-milk dry porridges for nutrition of babies, grain dry porridges for nutrition of babies, egg powder, freeze-dried meat products, animal feed. The results of the work allow for building a chain of metrological traceability from GET 173-2017, GET 176-2019 and PRMP to routine measurement procedures, thereby ensuring the uniformity of measurements of nutritional value of food products.

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