ISO INTERNATIONAL STANDARD 12771 First edition 1997-05-01 Plastics laboratory ware - Disposable serological pipettes Materiel de laboratoire en plastique - Pipettes sérologiques a usage unique ISO Reference number ISO 12771:1997(E) Not for Resale ISO 12771:1997(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 castinga vote. International Standard ISO 12771 was prepared by Technical Committee ISO/TC 48, Laboratory glassware and related apparatus, Subcommittee Sc 1, Volumetric instruments. Annex A of this International Standard is for information only. @1SO1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced 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 i rnational Organization for Standardization e from IHS Not for Resale INTERNATIONAL STANDARD ISO ISO 12771:1997(E) Plastics laboratory ware - Disposable serological pipettes Scope This International Standard specifies requirements for disposable plastics serological pipettes, gauged to deliver, suitable for general laboratory purposes. 2 Normative references 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 to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEc and IsoO maintain registers of currently valid International Standards. Iso 1043-1:1987, Plastics- Symbols — Part 1: Basic polymers and their special characteristics. Iso1769:1975, Laboratory glassware-Pipettes- Colourcoding. IsO 8417:—," Laboratory volumetric instruments - Principles of design and construction of disposable volumetric articles . 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 disposable: Adjective used to describe serological pipettes which are intended to be used once only and then discarded. NOTE -- Such pipettes will only be expected to provide their specified performance during the original operation. 3.2 accuracy (of a pipette): Closeness of agreement between the nominal volume and the true volume, 3.3 repeatability (of a number of pipettes): Closeness of agreement between the individual volumes obtained by applying the test procedure specified in 9.2. NOTE 1: Definitions and terms are in agreement with the "International Vocabulary of Basic and General Terms in Metrology".See ISO 3534-1 for details. 4 Basis of adjustment 4.1 Unit of volume The unit of volume is the cubic centimetre (cm"), for which the name millilitre (ml) may be used 1) To be published. Not for Resale