ISO INTERNATIONAL STANDARD 12772 First edition 1997-05-01 Laboratory glassware - Disposable microhaematocrit capillary tubes Verrerie de laboratoire- Tubes capillaires microhematocrites a usage unique ISO Reference number ISO 12772:1997(E) ISO12772:1997(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) technical committees. Each member body interested in a subject for which a technical committee has been non-governmental, in liaison with IsO, also take part in the work. Iso collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 castingavote, This International Standard ISO 12772 has been prepared by Technical Committee ISO/TC 48, Laboratory glassware and related apparatus, Subcommittee Sc 1, Volumetric instruments. Annexes A, B and C form an integral part of this International Standard. Annexes D and E are for information only. @ISO1997 All rights reserved.Unless otherwise specified, no part of this publication may be reproduced or utilized in anyform orby anymeans,electronic ormechanical,including photocopyingand microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56.CH-1211 Geneve 20.Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; S=central Printed in Switzerland ISO 12772:1997(E) INTERNATIONAL STANDARD ISO Laboratory glassware - Disposable microhaematocrit capillary tubes 1 Scope ThisInternationalStandardprovidesdetailsfortwotypesofdisposableglasscapillarytubes,suitableforthe microhaematocrit test and other analytical tests which include a separation of plasma and cells. The details specified are in conformity with isO 8417,to the greatest possible extent. WARNING - Capillary tubes can break during the analytical test procedure, resulting in broken sharp glass, blood spillage and aerosols.Appropriateprecautions shall betaken to avoid dangerous infections. 2 Normativereferences The following standards contain provisions which, through references in this text, constitute provisions of this International Standard.At the time of publication,the editions indicated were valid.All standards are subject torevision,andpartiestoagreementsbasedonthisInternationalStandardareencouragedtoinvestigatethe possibility of applying the most recent editions of the standards indicated below. Members of IEc and iso maintainregistersofcurrentlyvalid InternationalStandards. Iso719:1985,Glass-Hydrolytic resistanceofglassgrains at98°C-Methodof testandclassification. ISO 8417:1 ,Laboratory volumetric instruments - Principles of design and construction of disposable volumetric articles. 3 Definition For the purposes of this International Standard, the following definition applies. 3.1 disposable:Adjective used to describe microhaematocrit capillarytubes which are intendedtobe used once only and then discarded. NoTE- Such capillary tubes will only be expected to provide their specified performance during the original operation. 4 Classification This International Standard describes two types of disposable glass capillary tubes as follows: - Type l: coated with anti-coagulant - Type l: uncoated NOTE - Ammonium heparin, lithium heparin and sodium heparin are the preferred anti-coagulants for the microhaematocrittest.Salts of EDTAandfluorides(usually sodiumorpotassium)maybeusedwhencapillarytubesare neededfor special purposes. 1) To be published. 2)EDTA is an abbreviation for ethylenediaminotetraacetic acid