ISO INTERNATIONAL STANDARD 14714 First edition 1998-08-01 Essential oils and aromatic extracts Determination of residual benzene content Huiles essentielles et extraits aromatiques - Détermination de la teneur en benzeneresiduel ISO Reference number ISO 14714:1998(E) by IHS under lic itted without license from IHS Not for Resale ISO 14714:1998(E) Foreword IsO (the International Organization for Standardization) is a worldwide federationofnationalstandardsbodies(lsOmemberbodies).Theworkof preparing International Standards is normally 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, governmental and non- governmental, in liaison with ISO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (lEC)onallmattersofelectrotechnicalstandardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standards are drafted in accordance with the rules given in theISO/lECDirectives,Part3 International Standard ISO 14714 was prepared by Technical Committee ISO/TC 54, Essential oils. Annex A of this International Standard is for information only. @ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] Printed in Switzerland license from IHS Not for Resale ISO 14714:1998(E) INTERNATIONAL STANDARD @ ISO Essential oils and aromatic extracts Determination of residual benzene content Scope This International Standard describes a method for determining the residual traces of benzene in essential oils and aromatic extracts, using static headspace gas chromatography. It applies to residual contents of around 10 ×10-6 (10 ppm) in the analysed product. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigatethepossibilityof applyingthemostrecent editionsof thenormativedocumentsindicatedbelow.For undated references, the latest edition of the normative document referred to applies. Members of IsO and IEC maintain registers of currently valid International Standards IsO 356, Essential oilsPreparation of test samples. 3 Principle Analysis by gas chromatography of the static headspace on a capillary column, either by flame ionization detector Determination of residual benzene content using external standard method (by calibration) 4 Reagents 4.1 Reference substance: benzene, of minimum purity 99 %, as determined by gas chromatography. 4.2 Diethyl phthalate, free from any traces of benzene, to be verified under test conditions. Copyright International Organization for Standardizatior Not for Resale