Evaluation of uncertainty of reference materials

Pauwels, J.; Veen, Adriaan van der; Lamberty, A.; Schimmel, H.

doi:10.1007/s007690050020

Cited by 92 publications

(15 citation statements)

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“…The guidelines for CRM producers suggest that all sources relevant to the user of the material contribute to the uncertainty of the certified value (Pauwels et al 2000). The following sources are included in the overall uncertainty estimate.…”

Section: Estimation Of Uncertaintymentioning

confidence: 99%

Production and Certification of the Reference Material GSB 04‐3258‐2015 as a ¹⁴³Nd/¹⁴⁴Nd Isotope Ratio Reference

Tang

Zhu

et al. 2016

Geostandard Geoanalytic Res

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A new certified reference material, labelled GSB 04‐3258‐2015, for use as a 143Nd/144Nd isotope ratio reference has been prepared by the Institute of Geology, Chinese Academy of Geological Sciences, Beijing. Standardization Administration of the People's Republic of China provided the certification for this reference material. This report presents the reference 143Nd/144Nd isotope ratio and supporting production and certification procedures. The reference value was determined by an interlaboratory comparison of results from eleven participating laboratories using MC‐TIMS or MC‐ICP‐MS. The calibration of mass fractionation was conducted by using the exponential law, and the 143Nd/144Nd isotope ratios were normalised to the 146Nd/144Nd isotope ratio value of 0.7219. Isobaric interference of 144Sm on 144Nd was corrected using an interference‐free 147Sm/149Sm isotope ratio value for mass fractionation. GSB 04‐3258‐2015 shows sufficient homogeneity and stability for use as an international isotopic reference material. The certified value was calculated from the unweighted means of the results submitted by the participating laboratories. The 143Nd/144Nd isotope ratio value for GSB 04‐3258‐2015 is 0.512438, with a combined expanded uncertainty (k = 2) of 5 × 10−6. Reference material GSB 04‐3258‐2015 is available upon request from the Institute of Geology, Chinese Academy of Geological Sciences, and may be used for accurate interlaboratory calibration of Nd isotope analysis.

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Section: Estimation Of Uncertaintymentioning

confidence: 99%

Production and Certification of the Reference Material GSB 04‐3258‐2015 as a ¹⁴³Nd/¹⁴⁴Nd Isotope Ratio Reference

Tang

Zhu

et al. 2016

Geostandard Geoanalytic Res

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show abstract

“…The guidelines for CRM producers suggest that all sources relevant to the user of the material contribute to the uncertainty of the certified value (Pauwels et al . ). The following are included in the overall uncertainty estimate: uncertainties associated with the batch characterisation ( u char ), uncertainties related to possible between‐bottle variations ( u hom ) and instability derived from effects related to long‐term storage and short‐term transport ( u stab ).…”

Section: Estimation Of Uncertaintymentioning

confidence: 97%

New Chinese National Reference Materials for Hydrogen and Oxygen Isotopes in Water

Zhang

Liu

Yankun

et al. 2013

Geostandard Geoanalytic Res

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The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences recently prepared four certified reference materials for hydrogen and oxygen stable isotopes in water, which are called 'China Standard Water' (CSW)-HO1-HO4 (hereafter referred to as HO1-HO4). These reference materials are intended for calibration purposes and provide reference values of their relative difference in 2 H/ 1 H and 18 O/ 16 O isotope-amount ratios expressed in delta notation, normalised to the VSMOW-SLAP scale. The certified values of the reference materials were determined by an interlaboratory comparison of results from eleven participating laboratories. This paper describes in detail the production and certification procedure of the four reference materials. The first analytical data for the reference materials are also provided using a variety of analytical techniques, namely CO 2 -H 2 O equilibration and laser spectroscopy for d 18 O and Cr reduction, as well as H 2 -H 2 O equilibration, laser spectroscopy, and high-temperature conversion for d 2 H. The reference values for materials HO1-HO4 and their associated uncertainties are assigned.

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“…This not only includes the un-certainty of the batch characterization (u char ), but also all uncertainties relating the possible betweenbottle variation (u bb ), instability upon long-term storage (u lts ) and instability during transport to the customer (u sts ). The combined standard uncertainty for a CRM can thus be expressed as in Equation 1 [64].…”

Section: Development Of a Certified Reference Materialsmentioning

confidence: 99%

Fuel Ethanol Quality: Methods of Analysis and Reference Materials

Stradiotto¹,

Zanoni²,

Fraga³

et al. 2014

Sugarcane Bioethanol — R&D for Productivity and Sustainability

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Evaluation of uncertainty of reference materials

Cited by 92 publications

References 0 publications

Production and Certification of the Reference Material GSB 04‐3258‐2015 as a ¹⁴³Nd/¹⁴⁴Nd Isotope Ratio Reference

Production and Certification of the Reference Material GSB 04‐3258‐2015 as a ¹⁴³Nd/¹⁴⁴Nd Isotope Ratio Reference

New Chinese National Reference Materials for Hydrogen and Oxygen Isotopes in Water

Fuel Ethanol Quality: Methods of Analysis and Reference Materials

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Evaluation of uncertainty of reference materials

Cited by 92 publications

References 0 publications

Production and Certification of the Reference Material GSB 04‐3258‐2015 as a 143Nd/144Nd Isotope Ratio Reference

Production and Certification of the Reference Material GSB 04‐3258‐2015 as a 143Nd/144Nd Isotope Ratio Reference

New Chinese National Reference Materials for Hydrogen and Oxygen Isotopes in Water

Fuel Ethanol Quality: Methods of Analysis and Reference Materials

Contact Info

Product

Resources

About

Production and Certification of the Reference Material GSB 04‐3258‐2015 as a ¹⁴³Nd/¹⁴⁴Nd Isotope Ratio Reference

Production and Certification of the Reference Material GSB 04‐3258‐2015 as a ¹⁴³Nd/¹⁴⁴Nd Isotope Ratio Reference