INRiM contributions in the characterization and certification of reference materials

Durbiano, Francesca; Meane, Elena Amico di; Bergamaschi, L.; Boveri, Chiara; Sega, Michela

doi:10.1016/j.measurement.2011.05.003

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…The solution flow (50 ml min −1 ) is ensured by a peristaltic pump (Watson-Marlow Bredel Sci-Q 323). 3 The circuit also contains a secondary cell and an expansion chamber.…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…The Istituto Nazionale di Ricerca Metrologica (INRiM) has developed and is maintaining a metrological reference for electrolytic conductivity measurements in the range from 50 μS cm −1 to 2 S m −1 with an associated relative uncertainty better than 0.7% at a temperature of 25 • C. The measurement system has also been verified in several international comparisons [3][4][5]. The conductivity values obtained with the Jones-type primary cell [6,7] developed at INRiM are traceable to the SI units because conductivity measurements are based on length and resistance measurements carried out with calibrated instruments.…”

Section: Introductionmentioning

confidence: 99%

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Reference measurement system for low electrolytic conductivity values with a flowing solution

Orru

Durbiano

Ortolano

2013

Meas. Sci. Technol.

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In order to answer the needs of the industrial and the clinical sectors, INRiM has undertaken activities to extend the traceability of electrolytic conductivity measurements to pure water values. In this progress report, the new cell and the measurement system with flowing solution are described. Since international documents prescribe the use of a system with flowing solution to reduce CO2 contamination for solutions with conductivity lower than 50 µS cm−1, preliminary measurements were carried out on three solutions with conductivity values of 50, 30 and 10 µS cm−1. Moreover, a comparison between a system with static solution and one with flowing solution was executed.

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“…The solution flow (50 ml min −1 ) is ensured by a peristaltic pump (Watson-Marlow Bredel Sci-Q 323). 3 The circuit also contains a secondary cell and an expansion chamber.…”

Section: Experimental Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reference measurement system for low electrolytic conductivity values with a flowing solution

Orru

Durbiano

Ortolano

2013

Meas. Sci. Technol.

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“…For that purpose, availability of gaseous reference materials (RMs) is an essential requirement. In this framework, INRiM has a consolidated experience in the preparation of reference gas mixtures of CO 2 in air at atmospheric amount-of-substance fraction (amount fraction in the following) by gravimetry as candidate Certified Reference Materials (CRMs) [3][4][5]. The in-house prepared reference gas mixtures were used to participate in international key comparisons organised under the umbrella of the Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM) of the International Committee for Weights and Measures (CIPM) [6,7].…”

Section: Introductionmentioning

confidence: 99%

Generation of CO2 gas mixtures by dynamic dilution for the development of gaseous certified reference materials

Rolle

Durbiano

Pennecchi

et al. 2022

Measurement: Sensors

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“…Only a small part of CRMs of a soil matrix available in this base, Chinese production mainly, has the certified value of the nitrogen mass fraction [7]. Nitrogen is not on the list of the usually analyzed elements of The National Institute of Metrological Research (INRiM) in Italy as well [8].…”

Section: Introductionmentioning

confidence: 99%

Determination of the reference value of nitrogen mass fraction in the reference material of Polish soil

et al. 2016

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Ensuring a traceability and meaningful of a measurements is one of the most important stages of each analysis, each measurement. It is especially important for measurement of the environmental samples, like soil, which is a very complex matrix. A certified reference materials (CRMs) should be routinely used for this purpose. The paper discusses the procedure for preparation of the soil samples for certification as CRM. As for agricultural reasons there is a growing demand for CRMs regarding a nitrogen mass fraction in the Polish soil, we prepared such a material and established the reference value with associated measurement uncertainty. Homogeneity and stability of the material were shown to be appropriate for the intended purpose. The presented approach can also be used in a process of manufacture of a laboratory reference material, which can be used for a routine quality control.

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INRiM contributions in the characterization and certification of reference materials

Cited by 8 publications

References 6 publications

Reference measurement system for low electrolytic conductivity values with a flowing solution

Reference measurement system for low electrolytic conductivity values with a flowing solution

Generation of CO2 gas mixtures by dynamic dilution for the development of gaseous certified reference materials

Determination of the reference value of nitrogen mass fraction in the reference material of Polish soil

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