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| Tipo de Docum.: | artículo |
| Título: | Key comparison CCQM-K73 amount content of H+ in hydrochloric acid (0.1 mol·kg-1) |
| Autor: | Pratt, Kenneth W.; Ortiz-Aparicio, Jose Luis; Matehuala-Sanchez, Francisco Javier; Pawlina, Monika; Kozłowski, Władysław; Borges, Paulo P.; da Silva Junior, Wiler B.; Borinsky, Mónica B.; Hernandez, Ana; Puelles, Mabel; Hatamleh, Nadia; Acosta, Osvaldo; Nunes, João; Guiomar Lito, M. J.; Camões, M. Filomena; Filipe, Eduarda; Hwang, Euijin; Lim, Youngran; Bing, Wu; Qian, Wang; Chao, Wei; Hioki, Akiharu; Asakai, Toshiaki; Máriássy, Michal; Hanková, Zuzana; Nagibin, Sergey; Manska, Olexandra; Gavrilkin, Vladimir; Kutovoy, Viatcheslav |
| Título Ser./Col.: | Metrología, 50 |
| Autor Inst. Ser./Col.: | Bureau International des Poids et Mesures. BIPM. Paris. FR |
| Idioma: | eng |
| Datos de Edición: | s.l. IOP Publishing. 2013. |
| Pág./Vol.: | 22p. |
| Descriptores: | Metrología; Ácido clorhídrico; Hidrógeno; Cationes; Determinación (química); Incertidumbre; Dispersión |
| Resumen: | This key comparison (KC), CCQM-K73, was performed to demonstrate the capability of the participating National Metrology Institutes (NMIs) to measure the amount content of H+ , νH + , in an HCl solution with a nominal νH + of 0.1 mol·kg-1 . A parallel Pilot Study, CCQM-P19.2, was performed for NMIs that did not desire to participate in the KC. The comparison was a joint activity of the Electrochemical Working Group (EAWG) and Inorganic Analysis Working Group (IAWG) of the CCQM and was coordinated by NIST (USA) and CENAM (México). The method of determination of νH + was left to the individual participant. All participants used either coulometry or titrimetry with potentiometric determination of the endpoint. The agreement of the results was not commensurate with the claimed uncertainties of the subset of participants that claimed small uncertainties for this determination. A workshop on technical issues relating to the CCQM-K73 measurements was conducted at the joint IAWGEAWG meeting at the Bureau International des Poids et Mesures (BIPM), Paris (Sèvres) in April 2010. Several possible sources of bias were investigated, but none could explain the observed dispersion among the participants’ results. In the absence of a specific cause for the dispersion, the IAWG and EAWG decided to assign a Key Comparison Reference Value, KCRV, and standard uncertainty of the KCRV, uKCRV, based on the DerSimonian-Laird statistical estimator. The uKCRV is dominated by the between-laboratory scatter of results in CCQM-K73. The uncertainty estimates from the participants with the lowest reported uncertainties remain unsupported by this KC. |
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URL: |
https://iopscience.iop.org/article/10.1088/0026-1394/50/1A/08001 |
| Tipo de Docum.: | informe |
| Título: | Key Comparison CCQM-K73 amount content of H+ in hydrochloric acid (0.1 mol·kg-1); Final Report: 26 October 2012 |
| Autor: | Pratt, Kenneth W.. coord.; Ortiz-Aparicio, Jose Luis; Matehuala-Sanchez, Francisco Javier; Pawlina, Monika; Kozłowski, Władysław; Borges, Paulo P.; Silva, Wiler B. da; Borinsky, Mónica B.; Hernandez, Ana; Puelles, Mabel; Hatamleh, Nadia; Acosta, Osvaldo; Nunes, João; Guiomar Lito, M. J.; Camões, M. Filomena; Filipe, Eduarda; Hwang, Euijin; Lim, Youngran; Bing, Wu; Qian, Wang; Chao, Wei; Hioki, Akiharu; Asakai, Toshiaki; Máriássy, Michal; Hanková, Zuzana; Nagibin, Sergey; Manska, Olexandra; Gavrilkin, Vladimir |
| Autor Instit.: | Centro Nacional de Metrología. CENAM. MX; Dansk Fundamental Metrology. DFM. DK; Główny Urząd Miar. GUM. PL; Instituto Nacional de Metrologia, Normalização e Qualidade Industrial. INMETRO. BR; INTI-Química. Buenos Aires. AR; Instituto Português da Qualidade - Scientific and Applied Metrology Unit. IPQ/UMCA-LCM. PT; Korea Research Institute of Standards and Science. KRISS. KR; National Institute of Metrology of P. R. China. NIM. CN; National Institute of Standards and Technology. NIST. US; National Metrology Institute of Japan. NMIJ. JP; Slovenský Metrologický Ústav. SMU. SK; Ukrainian State Research and Production Center of Standardization Metrology, Certification, and Consumers’ Rights Protection. UMTS. UA; All-Russian Scientific Institute for Physical-Technical and Radiological Measurements. VNIIFTRI. RU |
| Idioma: | eng |
| Datos de Edición: | Gaithersburg. US. NIST. 2012. |
| Pág./Vol.: | 22p. |
| Unidad técnica: | INTI-Quimica. |
| Descriptores: | Metrología química; Acido clorhídrico; Hidrógeno; Soluciones ácidas; Métodos de determinación; Mediciones; Incertidumbre; Análisis volumétrico; Homogeneidad; Estabilidad; Trazabilidad; Técnicas estadísticas; Errores; Impurezas |
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