Término solicitado: DIMCHOGLO, IRINA/(22)
1 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. |
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Trabajo de INTI |
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URL: |
https://iopscience.iop.org/article/10.1088/0026-1394/45/1A/08015 |
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