ISO INTERNATIONAL STANDARD 16258-1 First edition 2015-09-15 Workplace air Analysis of respirable crystalline silica by X-ray diffraction - Part 1: Direct-on-filter method Air des lieux de travail - Fraction alvéolaire de la silice cristalline par diffraction de rayons X - Partie 1: Meéthode directe d'analyse sur filtre Reference number IS0 16258-1:2015(E) ISO International Organization for Standardization @ IS0 2015 dardization5956617 ted without license from IHS IS0 16258-1:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice 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 Intenationaibr PrganizationforStandardization etworking permitted without license from IHS IS0 16258-1:2015(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. .6 5.1.1 Samplers. ..6 5.1.2 Filters. .6 5.1.3 Sampling pumps 5.1.4 Flowmeters. .7 5.1.5 Other equipment required 1 5.2 Sample collection .8 5.3 Transport. .9 6 Analytical procedure .9 6.1 Apparatus and equipment .9 6.1.1 X-ray diffraction system .9 6.1.2 Balance. 6.1.3 Dust cloud generator. 6.1.4 Standard reference materials 10 6.1.5 Reagents .10 6.1.6 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 .13 6.6 Sample analysis. .13 7 Calculation ..13 7.1 Gravimetric analysis. .13 7.2 X-ray diffraction analysis ..13 7.3 Concentration of RCS .14 8 Performance characteristics. .15 8.1 Limit of detection .15 8.2 Minimum detectable value .15 8.3 Limits of quantification .15 8.4 Uncertainty. .15 8.5 Differences between samplers .16 8.6 Differences between analytical approaches .16 9 Test report ..16 Annex A (informative) Example instrumental conditions .18 Annex B (informative) Data collection parameters ..19 Annex C (normative) Corrections for absorption .20 iii ted withoutlicensefrom IHS Not for Resale, 2015/11/11 08:43:4