Skip to main content

Validation of Powder X‐Ray Diffraction Following EN ISO/IEC 17025

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

Abstract:  Powder X‐ray diffraction (PXRD) is used widely in forensic science laboratories with the main focus of qualitative phase identification. Little is found in literature referring to the topic of validation of PXRD in the field of forensic sciences. According to EN ISO/IEC 17025, the method has to be tested for several parameters. Trueness, specificity, and selectivity of PXRD were tested using certified reference materials or a combination thereof. All three tested parameters showed the secure performance of the method. Sample preparation errors were simulated to evaluate the robustness of the method. These errors were either easily detected by the operator or nonsignificant for phase identification. In case of the detection limit, a statistical evaluation of the signal‐to‐noise ratio showed that a peak criterion of three sigma is inadequate and recommendations for a more realistic peak criterion are given. Finally, the results of an international proficiency test showed the secure performance of PXRD.

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1556-4029.2011.02025.x

Affiliations: 1: Institute of Geosciences, Johannes Gutenberg University, D-55099 Mainz, Germany. 2: Forensic Science Institute, BKA, D-65173 Wiesbaden, Germany.

Publication date: 2012-05-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more