ISO INTERNATIONAL STANDARD 16740 First edition 2005-02-01 Workplace air Determination of hexavalent chromium in airborne particulate matter Method by ion chromatography and spectrophotometric measurement using diphenyl carbazide Air des lieux de travail Determination du chrome hexavalent dans les particules en suspension dans Iair Methode par chromatographie ionique et détection spectrophotometrique avec diphenyl carbazide Reference number ISO 16740:2005(E) @ ISO 2005 Not for Resale ISO16740:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ?ISO2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's memberbody in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 4122 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland CopyightInternatinal organization for Standardization @ ISo 2005 - All rights reserved vithout license from IHS Not for Resale ISO 16740:2005(E) Contents Page Foreword. Introduction .vi 1 Scope 2 Normative references. 3 Terms and definitions. 3.1 General definitions.. 3.2 Particle size fraction definitions.... 3.3 3.4 Analytical definitions . 3.5 Statistical terms .... 4 Principle 5 Reactions. 6 Requirement .. 7 Reagents .. 8 Apparatus... 10 8.1 Sampling equipment.. 10 8.2 Laboratory apparatus .... 9 Occupational exposure assessment.. 15 9.1 General.... 15 9.2 Personal sampling .... 15 9.3 Static sampling.... 16 9.4 Selection of measurement conditions and measurement pattern 16 10 Sampling method... 17 10.1 Preliminary considerations... 17 10.2 Preparation for sampling.... 18 10.3 Sampling position.... 19 10.4 Collection of samples.. 19 10.5 Transportation... 20 11 Analysis.. 21 11.1 Analytical requirements ........ 21 11.2 Preparation of solutions for determination of soluble hexavalent chromium compounds .... 22 11.3 Preparation of solutions for determination of insoluble hexavalent chromium compounds.... 23 11.4 .25 11.5 Estimation of detection and quantification limits..... 27 11.6 Quality control..... 27 11.7 Measurement uncertainty... 28 12 Expression of results.. .28 13 Method performance.. .29 13.1 Sample collection and stability .. 29 13.2 Hotplate extraction..... 13.3 Ultrasonic extraction 29 13.4 Interferences.. 29 14 Special cases.. 14.1 Spray-painting .30 Copyright International Oorganization forstandardizallon'ghts reserved ii se from IHS Not for Resale ISO 16740:2005(E) 14.2 Action to be taken when particles have become dislodged from the filter during transportation. ..30 15 Test report. 15.1 Test record .30 15.2 Laboratory report Annex A (informative) Temperature and pressure corrections Annex B (informative) Background on methods for determination of hexavalent chromium in air and guidance on their use.... Copyright International Organization for Standardization Iso2005-All rights reserved ed by IHS und Not for Resale ISO 16740:2005(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through ISO non-governmental, in liaison with isO, also take part in