Characterisation of a high purity nickel material to be used as a primary standard for element determination
- A candidate material for the use as primary standard for nickel determination was characterized with respect to total purity. For element determination a pure material can serve as primary standard. However, real world materials are never absolutely pure, hence the total purity of such materials need to be determined experimentally. A reasonable target uncertainty for the purity statement is 10-4 relative. Usually, the purer the material, the easier it is to achieve this target uncertainty. There are two basic ways in order to be able to establish a total purity statement. One is to determine the main component of a high purity material by a direct method such as coulometry, gravimetry or titrimetry. However, these methods are not selective enough for one element and therefore require certain efforts to analyse the material with respect to impurities with interfering analytes. Moreover, to reach the defined target uncertainty is not easy or often impossible to achieve. The secondA candidate material for the use as primary standard for nickel determination was characterized with respect to total purity. For element determination a pure material can serve as primary standard. However, real world materials are never absolutely pure, hence the total purity of such materials need to be determined experimentally. A reasonable target uncertainty for the purity statement is 10-4 relative. Usually, the purer the material, the easier it is to achieve this target uncertainty. There are two basic ways in order to be able to establish a total purity statement. One is to determine the main component of a high purity material by a direct method such as coulometry, gravimetry or titrimetry. However, these methods are not selective enough for one element and therefore require certain efforts to analyse the material with respect to impurities with interfering analytes. Moreover, to reach the defined target uncertainty is not easy or often impossible to achieve. The second approach is to determine the sum of all possible impurities (as mass fraction) and to subtract it from the ideal purity of 100 % (1 kg/kg). In principle all impurities (all elements not being the matrix element), metals and non-metals must be considered. In this work both approaches to determine the total purity of the nickel material were followed and compared.
The primary (solid) standards are usually used to prepare primary calibration solutions to which secondary and lower order calibration solutions are linked.…
Autor*innen: | Silke RichterORCiD |
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Koautor*innen: | Heinrich Kipphardt, Sebastian RecknagelORCiD, Jens Pfeifer |
Dokumenttyp: | Posterpräsentation |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2018 |
Organisationseinheit der BAM: | 1 Analytische Chemie; Referenzmaterialien |
1 Analytische Chemie; Referenzmaterialien / 1.6 Anorganische Referenzmaterialien | |
DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
Freie Schlagwörter: | High purity material; Nickel; Primary standard |
Themenfelder/Aktivitätsfelder der BAM: | Chemie und Prozesstechnik |
Chemie und Prozesstechnik / Chemische Charakterisierung und Spurenanalytik | |
Veranstaltung: | BERM-15 |
Veranstaltungsort: | Berlin, Germany |
Beginndatum der Veranstaltung: | 23.09.2018 |
Enddatum der Veranstaltung: | 26.09.2018 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 10.10.2018 |
Referierte Publikation: | Nein |