Término solicitado: TURK, GREGORY/(22)
2 Registro/s encontrado/s en CAT+NORMA
| Tipo de Docum.: | artículo |
| Título: | Key comparison CCQM-K59 : determination of nitrite and nitrate in calibration solutions. Final report |
| Autor: | Máriássy, Michal; Hioki, Akiharu; Konopelko, Leonid A.; Dimchoglo, Irina; Winchester, Michael; Butler, Therese; Case, Ryan; Hernández, Ana; Galli, Ariel; Alvarez, Pablo; Lee, Joung Hae; Royer, Chantal; Shi, Naijie; Chao, Jingbo; Wu, Bing; Li, Haifeng; Turk, Gregory |
| Título Ser./Col.: | Metrología, 45 |
| Autor Inst. Ser./Col.: | Bureau International des Poids et Mesures. BIPM. FR |
| Idioma: | eng |
| Datos de Edición: | s.l. IOP Publishing. 2008. |
| Pág./Vol.: | 20p. |
| Descriptores: | Metrología; Incertidumbre; Calibración; Nitritos; Nitratos; Soluciones; Aniones; Cromatografía |
| Resumen: | In this key comparison anion calibration solutions of nitrate and nitrite were investigated. The mass fractions of the anions in both solutions were about 1 g/kg. For the nitrate comparison 8 participants provided results; 3 analytical techniques were used: ion chromatography, capillary electrophoresis and coulometry after ion exchange. The nitrite amount content was determined by 7 participants using one of the following 3 techniques: ion chromatography, titrimetry, and capillary electrophoresis. The following institutes participated in this key comparison: INTI (Argentina), KRISS (Korea), LNE (France), NIM (P.R.China), NIST (USA), NMIJ (Japan), SMU (Slovakia), and VNIIM (Russia). The variability (RSD) of the results is about 0.75% for both the nitrite and the nitrate solutions. Compared to the key comparison CCQM-K29 the results of CCQM-K59 were significantly worse. This is in part due to the measurement methods used, possibly also due to the standards used by the institutes. A pilot study (P89) was performed in parallel on the same calibration solutions used in this K59 comparisons study by laboratories preferring to participate in the pilot study and on a seawater sample containing about 0.1 mg/kg nitrite and 1 mg/kg nitrate. The results of the pilot study are reported separately. |
 Ver Documento
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Trabajo de INTI |
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URL: |
https://iopscience.iop.org/article/10.1088/0026-1394/45/1A/08015 |
| Tipo de Docum.: | artículo |
| Título: | Report of the key comparison CCQM-K88 : determination of lead in lead-free solder containing silver and copper |
| Autor: | Hioki, Akiharu; Nonose, Naoko; Liandi, Ma; Jingbo, Chao; Liuxing, Feng; Chao, Wei; Cho, Kyung Haeng; Suh, Jung Ki; Min, Hyung Sik; Lim, Youngran; Recknagel, Sebastian; Koenig, Maren; Vogl, Jochen; Caciano de Sena, Rodrigo; dos Reis, Lindomar Augusto; Borinsky, Mónica; Puelles, Mabel; Hatamleh, Nadia; Acosta, Osvaldo; Turk, Gregory; Rabb, Savelas; Sturgeon, Ralph; Methven, Brad; Rienitz, Olaf; Jaehrling, Reinhard; Konopelko, L. A.; Kustikov, Yu. A.; Kozyreva, S. B.; Korzh, A. A. |
| 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.: | 20p. |
| Descriptores: | Metrología; Plomo; Soldadura; Cobre; Plata; Determinación (química); Instrumentos de medición; Espectroscopía; Incertidumbre; Mediciones |
| Resumen: | The CCQM-K88 key comparison was organised by the Inorganic Analysis Working Group of CCQM to test the abilities of the national metrology institutes to measure the mass fraction of lead in lead-free solder containing silver and copper. National Metrology Institute of Japan (NMIJ), National Institute of Metrology P. R. China (NIM) and Korea Research Institute of Standards and Science (KRISS) acted as the coordinating laboratories. The participants used different measurement methods, though most of them used inductively coupled plasma optical emission spectrometry (ICP-OES) or isotope-dilution inductively coupled plasma mass spectrometry (ID-ICP-MS). Accounting for relative expanded uncertainty, comparability of measurement results was successfully demonstrated by the participating NMIs for the measurement of the mass fraction of lead in lead-free solder at the level of 200 mg/kg. It is expected that metals at mass fractions greater than approximately100 mg/kg in lead-free solder containing silver and copper can be determined by each participant using the same technique(s) employed for this key comparison to achieve similar uncertainties mentioned in the present report. |
| Ver Documento
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Trabajo de INTI |
|
URL: |
https://doi.org/10.1088%2F0026-1394%2F50%2F1a%2F08002 |
Fin
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