ISO INTERNATIONAL STANDARD 16258-2 First edition 2015-09-15 Workplace air Analysis of respirable crystalline silica by X-ray diffraction - Part 2: Method by indirect analysis Air des lieux de travail - Fraction alvéolaire de la silice cristalline par diffraction de rayons X- Partie 2: Méthode indirecte d'analyse Reference number IS0 16258-2:2015(E) ISO International Organization for Standardization @ IS0 2015 dardization 5956617 ed without license from IHS IS0 16258-2:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Intenatinair PrganizationforStandardization Not for Resale, 2015/11/11 08:43:00 etworking permitted without license from IHS IS0 16258-2:2015(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope. 2 Normative references 3 Terms and definitions. 3.1 General definitions. ..1 3.2 Sampling definitions 3.3 Analytical definitions ..3 3.4 Statistical terms 4 4 Principle 5 Sampling. 5.1 Sampling equipment. ..5 .5 5.1.1 Samplers. 5.1.2 Collection substrates .6 5.1.3 Sampling pumps 5.1.4 Flowmeters. .7 5.1.5 Other equipment required .8 5.2 Sample collection .8 5.3 Transport. .9 6 Analytical procedure .10 6.1 Apparatus and equipment 10 6.1.1 Instrument ..10 6.1.2 Balance. ..10 6.1.3 Laboratory equipment. ..10 6.1.4 Equipment to recover dust from the air sample filter ..10 6.1.5 Standardreferencematerials .10 6.1.6 Reagents. ..10 6.1.7 Drift correction sample ..11 6.2 Gravimetric analysis for respirable dust .11 6.3 X-ray diffraction analysis. .11 6.3.1 Instrumental parameters .11 6.3.2 Scan parameters. .11 6.4 Calibration curve .11 6.5 Sample treatment of collection substrate ..13 6.5.1 PVC and MCE filters. ..13 6.5.2 Cellulose nitrate filters .14 6.5.3 Polyurethane foams.. ..14 6.6 Redeposition onto analysis filter .15 6.6.1 Crucibles from the furnace .15 6.6.2 Bottles or beakers from a plasma asher .15 6.7 Sample analysis. .15 7 Calculation .16 7.1 Gravimetric analysis. .16 7.2 X-ray diffraction analysis .16 7.3 Concentration of RCS. .17 8 Performance characteristics .17 8.1 Limit of detection.. ..17 8.2 Minimum detectable value .18 8.3 Limits of quantification .18 8.4 Uncertainty .18 8.5 Differences between samplers .18 Intematinal oganzation @stS2015 - All rights reserved iii iseeZhejang Insttute of Standardization 5956617 ithout license from IHS Not for Resale, 2015/11/11 08:43:00