This document specifies the requirements and choice of test method for the determination of the size-weighted fine fraction (SWFF) and the size-weighted fine fraction of crystalline silica (SWFFCS) in bulk materials. This document gives also guidance on the preparation of the sample and determination of crystalline silica by X-ray Powder Diffractometry (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR). NOTE EN 17289-2 specifies a method to calculate the size-weighted fine fraction from a measured particle size distribution and assumes that the particle size distribution of the crystalline silica particles is the same as the other particles present in the bulk material. EN 17289-3 specifies a method using a liquid sedimentation technique to determine the size-weighted fine fraction of crystalline silica. Both methods are based upon a number of limitations and assumptions, which are listed in EN 17289-2 and EN 17289-3, respectively. The method in EN 17289-3 can also be used for other constituents than CS, if investigated and validated. This document is applicable for crystalline silica containing bulk materials which have been fully investigated and validated for the evaluation of the size-weighted fine fraction and crystalline silica.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4 Symbols and abbreviations 5 Test methods <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 6 Guidelines for the determination of crystalline silica 6.1 Preparation of sample to be analysed 6.2 Sample preparation for further analysis by XRD and FT-IR 7 Test report <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Annex A (informative)Bias and uncertainties A.1 General A.2 Bias between EN 481 and sedimentation SWFF probability function and influence of density and mineral phase mass fraction A.2.1 Bias between EN 481 and sedimentation SWFF probability curve A.2.1.1 General A.2.1.2 Ideal powder, one mineral phase of known density and ideal SWFF measurement <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | A.2.2 Internal SWFF sedimentation bias A.2.2.1 General A.2.2.2 Ideal powder, two mineral phases of known density and ideal SWFF sedimentation measurement <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | A.2.3 Internal SWFF sedimentation bias A.2.3.1 General A.2.3.2 Powder, two mineral phases of density varying with particle volume-equivalent diameter and ideal SWFF sedimentation measurement A.2.3.3 Internal method bias and bias between EN 481 and sedimentation SWFF probability curve for non-ideal powders <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | A.3 Uncertainty A.3.1 Uncertainty due to assumptions <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | A.3.2 Uncertainties due to measurements A.3.2.1 Calculation method A.3.2.2 Sedimentation method <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Annex B (informative)Round robin test to establish a SWFF reference sample B.1 General B.2 Test material <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | B.3 Evaluation and appraisal method <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | B.4 Results <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Annex C (informative)Determination of crystalline silica in bulk samples using X-Ray diffraction (XRD) or FT-IR spectroscopy C.1 General C.2 Preparation of bulk samples for determination of CS using XRD C.2.1 General C.2.2 Method 1: Bulk method C.2.2.1 General <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | C.2.2.2 Preparation C.2.2.3 Measurement C.2.2.4 Calculation <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | C.2.3 Method 2: Deposition method <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | C.3 Preparation of bulk samples for determination of CS using FT-IR C.3.1 Identification of the interfering minerals C.3.2 Interferences removal C.3.3 Standards and sample preparation C.3.4 Operating conditions C.3.5 Measurement <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | C.3.6 Determination of the quartz content <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex D (informative) Calculating SWFF and SWFFCS from a given particle size distribution using a spreadsheet D.1 Spreadsheet setup <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | D.2 Example <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Characterization of bulk materials. Determination of a size-weighted fine fraction and crystalline silica content – General information and choice of test methods<\/b><\/p>\n |