## Determination of the k-values of copper-gold alloys with ED- and WD-EPMA - Results of an inter-laboratory comparison

- An inter-laboratory comparison organized as a pilot study (PS) has been performed under the umbrella of the Consultative Committee for Amount of Substance – Metrology in Chemistry (CCQM) / Surface Analysis Working Group (SAWG) with the objective to compare k-values measured with Electron Probe X-ray Microanalysis (EPMA) for copper-gold alloys. The k-value, defined as the ratio of the Xray photon intensity of an X-ray characteristic line of the unknown sample to the corresponding one in the reference material, is a rough estimate of the mass fraction of the respective element. Basically, the mass fractions can be calculated from the k-values after applying a matrix correction procedure, which includes empirical approaches, so that traceability gets lost. Due to its physical, measurable nature, the k-value has been selected in the present PS as the primary measurand. The mass fraction has been set as the secondary (derived) measurand. Both EDX and WDX have been employed. The WDX resultsAn inter-laboratory comparison organized as a pilot study (PS) has been performed under the umbrella of the Consultative Committee for Amount of Substance – Metrology in Chemistry (CCQM) / Surface Analysis Working Group (SAWG) with the objective to compare k-values measured with Electron Probe X-ray Microanalysis (EPMA) for copper-gold alloys. The k-value, defined as the ratio of the Xray photon intensity of an X-ray characteristic line of the unknown sample to the corresponding one in the reference material, is a rough estimate of the mass fraction of the respective element. Basically, the mass fractions can be calculated from the k-values after applying a matrix correction procedure, which includes empirical approaches, so that traceability gets lost. Due to its physical, measurable nature, the k-value has been selected in the present PS as the primary measurand. The mass fraction has been set as the secondary (derived) measurand. Both EDX and WDX have been employed. The WDX results and the overall comparability between the k-values obtained by EDX and WDX are still in progress.…

Autoren/innen: | Vasile-Dan Hodoroaba, R.B. Marinenko, Vanessa Rackwitz, Wolfram Bremser, Wolfgang Unger |
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Dokumenttyp: | Zeitschriftenartikel |

Veröffentlichungsform: | Verlagsliteratur |

Sprache: | Englisch |

Titel des übergeordneten Werkes (Englisch): | Microscopy and microanalysis |

Jahr der Erstveröffentlichung: | 2014 |

Organisationseinheit der BAM: | 1 Analytische Chemie; Referenzmaterialien |

1 Analytische Chemie; Referenzmaterialien / 1.4 Prozessanalytik | |

6 Materialschutz und Oberflächentechnik | |

6 Materialschutz und Oberflächentechnik / 6.1 Oberflächenanalytik und Grenzflächenchemie | |

Herausgeber (Institution): | Microscopy Society of America |

Verlag: | Cambridge University Press |

Verlagsort: | New York, NY |

Jahrgang/Band: | 20 |

Ausgabe/Heft: | Suppl. S 3 |

Erste Seite: | 730 |

Letzte Seite: | 731 |

Freie Schlagwörter: | CCQM; Cu-Au alloy; EDX; EPMA; Interlaboratory comparison; K-values; WDX |

DOI: | https://doi.org/10.1017/S1431927614005376 |

ISSN: | 1431-9276 |

ISSN: | 1435-8115 |

Verfügbarkeit des Volltexts: | Volltext-PDF im Netzwerk der BAM verfügbar ("Closed Access") |

Datum der Freischaltung: | 20.02.2016 |

Referierte Publikation: | Ja |

Datum der Eintragung als referierte Publikation: | 11.09.2014 |