Development of a certified reference material: ethanol in water - a practical case

Souza, Vanderléa de; Caixeiro, Janaína Marques Rodrigues; Silva, Rafael A. L. da; Pedro, Leandro R.; Borges, Rodrigo; Couto, Paulo Roberto Guimarães

doi:10.1590/s1516-89132006000200017

Cited by 6 publications

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“…Absorption of moisture from exposure of the study sample when breaking the ampoule during weighing and transfer could also occur [9]. This uncertainty component was accounted for in the budget based on Karl Fisher titrations conducted in a humidity-controlled room.…”

Section: Estimation Of Uncertainty For Components Of the Idms Measurementioning

confidence: 99%

A bilateral study for the establishment of comparability in the measurement of ethanol in bioethanol fuel using isotope dilution mass spectrometry

et al. 2011

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A bilateral comparative study between two metrology institutes was conducted for the determination of ethanol in bioethanol fuel by isotope dilution mass spectrometry. Measurement procedures were independently developed by the Health Sciences Authority (Singapore) and the National Institute of Metrology (People's Republic of China). The methods used included headspace gas chromatography-high-resolution mass spectrometry, headspace gas chromatography-mass spectrometry (GC-MS) and direct injection to GC-MS. An investigation of all potential sources of uncertainty, including a component of uncertainty due to the effect of using different instruments such as gas chromatography-flame ionization detector method, commonly adopted for the analysis of organic volatiles, was carried out. The results of the analyses are consistent within the associated measurement uncertainty of each laboratory, reported at approximately 95% confidence level.

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Section: Estimation Of Uncertainty For Components Of the Idms Measurementioning

confidence: 99%

A bilateral study for the establishment of comparability in the measurement of ethanol in bioethanol fuel using isotope dilution mass spectrometry

et al. 2011

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Evaluation of the stability of ethanol in water certified reference material: measurement uncertainty under transport and storage conditions

et al. 2008

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Abstract:This study simulated the transport and storage conditions of ethanol in water certified reference material (CRM) produced by the Chemical Metrology Division of Inmetro -DQUIM with the purpose to estimate the measurement uncertainty related to stability. The short-term stability study was performed on five different concentrations in terms of g ethanol/100g solution (%) of the ethanol in water CRM: 0.0509%, 0.0890%, 0.1145%, 0.3820% and 0.4960%, at the temperatures of 4 ºC and 60 ºC. On the other hand, the longterm stability study was developed on four different concentrations: 0.0509%, 0.0890%, 0.1145% and 0.4960%. In this paper will be shown data from the long-term stability study concerning 20 weeks.The method used complies with ISO GUIDE 35, BCRGuideline for Feasibility Studies and ISO GUIDE 34.According to the statistical parameters used in both studies the stability of the ethanol in water CRM was confirmed for all concentrations studied.

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Evaluation of the source of bias caused by losses of solvent vapour during sample preparation

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Development of a certified reference material: ethanol in water - a practical case

Abstract: The present work describes the development of a certified reference material (CRM) composed of solutions of ethanol in water in five different concentrations, and all stages necessary for the development of an CRM, according to the guidelines of ISO GUIDES 30, 31, 32, 33, 34 and 35

Cited by 6 publications

References 1 publication

A bilateral study for the establishment of comparability in the measurement of ethanol in bioethanol fuel using isotope dilution mass spectrometry

A bilateral study for the establishment of comparability in the measurement of ethanol in bioethanol fuel using isotope dilution mass spectrometry

Evaluation of the stability of ethanol in water certified reference material: measurement uncertainty under transport and storage conditions

Evaluation of the source of bias caused by losses of solvent vapour during sample preparation

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