Preparation of a sewage sludge laboratory quality control material for butyltin compounds and their determination by isotope-dilution mass spectrometry

2012 ◽  
Vol 403 (3) ◽  
pp. 857-865 ◽  
Author(s):  
Tea Zuliani ◽  
Radmila Milačič ◽  
Janez Ščančar
Keyword(s):  
Mass Spectrometry ◽  
Quality Control ◽  
Sewage Sludge ◽  
Isotope Dilution ◽  
Isotope Dilution Mass Spectrometry ◽  
Quality Control Material ◽  
Control Material ◽  
Butyltin Compounds

scholarly journals Preparation and characterisation of uranium and plutonium quality control samples for isotope dilution mass spectrometry measurements and uncertainty estimation

2021 ◽  
Author(s):  
Célia Venchiarutti ◽  
Rožle Jakopič ◽  
Carmel Hennessy ◽  
Kalman Toth
Keyword(s):  
Mass Spectrometry ◽  
Quality Control ◽  
Isotope Dilution ◽  
Certified Reference Materials ◽  
Isotope Dilution Mass Spectrometry ◽  
Proficiency Tests ◽  
Iso 17025 ◽  
Uncertainty In Measurement ◽  
Measurement Results ◽  
Expression Of Uncertainty

AbstractThis paper presents the preparation, characterisation and validation of two quality control (QC) samples for the measurement of plutonium and uranium contents by isotope dilution mass spectrometry (IDMS). These two QC samples were then used at the JRC-Geel G.2′s laboratory to monitor the performance of IDMS measurement results in line with the ISO 17025 and ISO 17034. The QC samples were prepared from two certified reference materials, namely the NBL-126 (Pu) and CRM 116-A (U). The values for the 235U and 239Pu amount contents of the QC samples were assigned based on the gravimetric preparation of the solutions and verified by independent IDMS measurements. Their use as part of a broader in-house spike inter-calibration campaign, notably during participations in proficiency tests, is also highlighted. Finally, using these two IDMS QC samples, a detailed approach to the IDMS uncertainty evaluation, according to the Guide to the expression of uncertainty in measurement (GUM, 2008) is presented on various examples.

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