ISO/TS TECHNICAL SPECIFICATION 17306 Firstedition 2016-02-01 Petroleum products Biodiesel - Determination of free and total glycerin and mono-, di- and tracylglycerols by gas chromatography Produits pétroliersBiogazole -Détermination de glycerine libre et totale et des mono-, di- et tracylglycerols avec chromatographie gazeuse Reference number IS0/TS17306:2016(E) ISO @IS02016 IS0/TS 17306:2016(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2016, Published in Switzerland 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 copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122749 0947 [email protected] www.iso.org Coovriaht iller @ IS0 2016 - All rights reserved IS0/TS17306:2016(E) Contents Page Foreword .iv Introduction ..V 1 Scope .1 2 Normative references 3 Terms and definitions .1 4 Principle. .2 5 Apparatus. 6 Reagents and materials 3 7 Preparation of the apparatus 3 8 Sampling. 4 9 Preparation of the standard solutions. 14 9.1 Preparation of the stock solutions 9.2 Preparation of the calibration curve 5 9.3 Preparation of the sample 6 9.4 Procedure 7 10 Calculation and expression of results 8 11 Precision. .10 11.1 General 10 11.2 Repeatability, r 10 11.3 Reproducibility, R 10 12 Test report .11 Annex A (normative) Check chromatograms 12 Annex B (normative) Calculation of the coefficients for determination of the combined glycerol.16 Annex C (informative) Information on interlaboratory study .20 Bibliography .21 onal orazisMaaraizAh rights reserved ii