fulltext_015 - Chapter 16 Reference Materials Contents 16.1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
377 ±Abstract±: Reference materials for measurement of particle size and porosity may be used for calibration or qualification of instruments or for validation of operating procedures or operators. They cover a broad range of materials. On the one hand there are the certified reference materials, for which governmental institutes have certified one or more typical size or porosity values. Then, there is a large group of reference materials from commercial companies. And on the other hand there are typical products in a given line of industry, where size or porosity values come from the analysis laboratory itself or from some round-robin test in a group of industrial laboratories. Their regular application is essential for adequate quality control of particle size and porosity measurement, as required in e.g., ISO 17025 on quality management. In relation to this, some quality requirements for certification are presented.± Chapter 16 Reference Materials Good practice requires: availability of suitable reference materials availability of sufficient certified data application of (certified) reference materials adequate reporting of procedures and data H.G. Merkus, Particle Size Measurements, DOI 10.1007/978-1-4020-9015-8_16, © Springer Science+Business Media B.V. 2009 Contents 16.1 Types of Reference Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378 16.2 Quality Aspects and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380 16.3 Storage and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384 16.4 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385 16.5 Future Prospects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388 16.6 Definitions and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389 Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 390 Annex 16 A: Application of Reference Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . 392 Annex 16 B: Reference Materials from NIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395 Annex 16 C: Reference Materials from BCR/IRMM . . . . . . . . . . . . . . . . . . . . . . . . . 397 Annex 16 D: PSD Reference Materials from APPIE . . . . . . . . . . . . . . . . . . . . . . . . . 399 Annex 16 E: Abrasive Reference Materials from FEPA . . . . . . . . . . . . . . . . . . . . . . 401 Annex 16 F: Potential New PSD Reference Materials APPIE [13, 15, 16] . . . . . . . . 402
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
378 16 Reference Materials ±16.1± ±Types±of±Reference±Materials± The simplest type of reference material is a typical product in a given line of industry. Its typical size (or porosity) data together with its precision usually has been established by multiple measurements in a single laboratory or in a round- robin test in different laboratories in the same line of industry. Often, optimum operating procedures have been established and used for measurement of product- specific PSD parameters, in order to provide adequate precision for the critical quality parameters of the products. They are usually applied for validation of the performance of operators and laboratories, for example in proficiency test- ing schemes (see Chap. 17). Examples are abrasives (see Annex 16E), Portland cement and potato starch. These products have the advantage that they are cheap and available in large quantities. Moreover, they are identical or similar to the normal line of products that are analyzed in the laboratory and, thus, provide no extra difficulties during sampling or dispersion. Reference data are usually related to product specifications.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 26

fulltext_015 - Chapter 16 Reference Materials Contents 16.1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online