6533b7d6fe1ef96bd1266dd0
RESEARCH PRODUCT
Systematic procedure for the preparation of sets of calibration standards for x-ray fluorescence analysis of ceramic materials
S. SagradoE. Ochandio-cardoGuillermo Ramis-ramossubject
Matrix (chemical analysis)Set (abstract data type)AnalyteCertified reference materialsChemistryCalibrationAnalytical chemistryDesign matrixX-ray fluorescenceSample preparationCeramic materialsSpectroscopydescription
A systematic procedure for the preparation of optimized sets of calibration solid standards for the x-ray fluorescence analysis of ceramic materials is described. The matrix of the contents of the N analytes in the n standards (n ≥ N) is calculated from an n x N experimental design matrix, and from the upper and lower limits of the calibration range for each of the N analytes. Two procedures, which are useful for taking into account analyte interactions, are proposed for constructing the experimental design matrix, i.e. the scroll procedure and the procedure of the centers. A program developed to help the analyst in designing and preparing the set of standards following the proposed procedures is also presented. The program includes several options of practical interest, e.g. replacement of some of the N metal oxides and salts by certified reference materials in the matrix of the contents, in order to imitate the sample matrix better without altering the composition of the standards, and recalculation of the actual composition of the standards from the weights taken during preparation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-11-01 | X-Ray Spectrometry |