ISO INTERNATIONAL STANDARD 9486 First edition 1991-08-15 Workplace air .- Determination of vaporous chlorinated hydrocarbons Charcoal tube/solvent desorption/gas chromatographic method Air des lieux de travail - Determination des hydrocarbures chlores vaporeux - Methode d'analyse par tube a charbon actifldesorption des solvants/chromatographie en phase gazeuse Reference number ISO 9486:1991(E) Copyright International Organization for Standardization Not for Resale ISO 9486:1991(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 normaily carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with IsO, also take part in the work. Iso collaborates ciosely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization, national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IsO 9486 was prepared by Technical Committee ISO/TC 146, Air quality, Sub-Committee SC 2, Workplace atmospheres. Annexes A, B and C form an integral part of this International Standard. Annex D is for information only. ? 1SO 1991 All rights reserved. No part of this publication may be reproduced or utllized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 : CH-1211 Geneve 20 · Switzerland Printed in Switzeriand 11 Not for Resale t license from IHS 1SO .9486:1991(E) INTERNATIONAL STANDARD Workplace air -- Determination of vaporous chlorinated hydrocarbons --- Charcoal tube/solvent desorption/gas chromatographic method proximately 1'mg/m3 : to 1000 mg/m3 Scope (about 1 0,2 ml/m3 to 200 ml/m3; see 8.1) .when: sampling 10 litres of air. This International Standard specifies a charcoal tube/gas chromatographic method for the determi- NOTE 1. The upper limit of the useful range is set by the nation of the concentration of vaporous chlorinated adsorptive capacity of the first section of the charcoal hydrocarbons in workplace air. tube (5.1). used. This capacity is measured as a break- through volume of air, which should not be exceeded The method is valid for the measurement of the during sampling (see clause 6 and annex A). concentrations of airborne vapours of any of the fol- jowing compounds: The lower limit is set by a number of parameters, includ. ing the noise level of the detector (5.9), blank concen- a) dichloromethane; trations due to the contamination of the charcoal tube and carbon disulfide by the substance analysed, desorption b) chloroform; efficiency (see -annex B) and interference of the soivent peak in the gas chromatographic analysis. c) carbon tetrachloride; The method is also valid for the measurement of d) 1,1-dichloroethane; airborne concentrations of mixtures of these com- pounds. In such cases, the unique properties of each e) 1,2-dichloroethane; compound have to be considered when determining the volume of air to be sampled. and the gas chro- f)1,1-dichloroethene; matographic conditions to be used. g) 1,2-dichloroethene; NOTE 2 When analysing chilorinated hydrocarbon mix- tures with very Iarge differences in concentrations and in which several compounds are present, the reproducibility h) 1,1,1-trichloroethane; and repeatability of the compounds of minor importance might be influenced. i)1,1,2-trichioroethane: The method has been validated for a selection 'of j) trichtoroethene; typical chlorinated hydrocarbons[1]. k) 1.1,2,2-tetrachloroethane; This 'procedure is compatible with iow fiow rate I) tetrachloroethene; personal sampling equipm