ISO/TS TECHNICAL SPECIFICATION 16780 Firstedition 2015-08-15 Water quality - Determination of polychlorinated naphthalenes (PCN) Method using gas chromatography (GC) and mass spectrometry (MS) Qualité de I'eau-Détermination des naphtalenes polychlorés (PCN) - Meéthode par chromatographie en phase gazeuse (CG) et spectrométrie de masse (SM) Reference number ISO/TS 16780:2015(E) SO International Organization for Standardization @ IS0 2015 ed without license from IHS IS0/TS 16780:2015(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 copyright@iso.org www.iso.org PrganizationforStandardization etworking permitted without license from IHS IS0/TS 16780:2015(E) Contents Page Foreword ..V 1 Scope .1 2 Normative references .1 3 Terms, definitions, and abbreviated terms. 3.1 Terms and definitions ..2 3.2 Abbreviated terms. 4 Principle ..6 4.1 Extraction .6 4.2 Clean-up. 1 4.3 Identification and quantification 1 4.4 Quality ..8 5 Contamination and interferences. ..8 6 Reagents and standards ..10 7 Apparatus and materials. ..16 8 Sample collection, preservation, storage and holding times .19 8.1 General ..19 8.2 Storagetimes. .19 9 Quality assurance and quality control .20 9.1 General .20 9.2 Spiking. 20 9.3 Recovery of labelled compounds assessment .21 9.4 Method blanks. .21 9.5 QC check sample .21 10 Calibration .21 10.1 Operating conditions .21 10.2 Mass spectrometer resolution .22 10.3 Ion abundance ratios, minimum levels, signal-to-noise ratios, and absolute retention times. 22 10.4 Retention time. 22 10.5 Column resolution performance check. 23 10.6 Calibration by isotope dilution. .23 10.7 Calibration by internal standard 23 10.8 Combined calibration. 24 10.8.1 General 24 10.8.2 Data storage .24 10.8.3 Data acquisition 24 10.8.4 Responsefactors and multipoint calibrations. 24 11 Sample preparation .25 11.1 General 25 11.2 Determination of solid particulate material 25 11.3 Preparation of aqueous samples containing 2 g/l of solid particulate material or less.. 25 11.3.1 General 25 11.3.2 Preparation of sample and QC aliquots 26 11.3.3 Filtration of particles. ..26 12 Extraction ..26 12.1 Separating funnel extraction of filtrates and of aqueous samples that are visibly absentofparticles ..26 12.2 Solid phase extraction (SPE) of samples containing less than 2 g/l suspended particlulatematter .27 12.2.1 Disk/cartridge preparation ..27 iii ed without license from IHS