1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 87.040 ISBN 0-626-15208-9 SANS 11890-2:2004 Edition 1 ISO 11890-2:2000 Edition 1 SOUTH AFRICAN NATIONAL STANDARD Paints and varnishes Determination o
4、f volatile organic compound (VOC) content Part 2: Gas-chromatographic method This national standard is the identical implementation of ISO 11890-2:2000 and is adopted with the permission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan road groe
5、nkloof ! private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2004 SANS 11890-2:2004 Edition 1 ISO 11890-2:2000 Edition 1 Table of changes Change No. Date Scope Abstract Specifies a method for the determination of the v
6、olatile organic compound (VOC) content of paints, varnishes and their raw materials. This part shall be used where the expected VOC content is greater than 0,1 % by mass and less than about 15 % by mass. Keywords chemical analysis and testing, chemical composition, coating materials, coatings, conte
7、nts, gas chromatography, gas-phase chromatograph, lacquers, methods of analysis, organic compounds, paints, pigments, sampling methods, solvents, varnishes, volatile, volatile matter determination, volatile organic compound content, gravemetric. National foreword This South African standard was appr
8、oved by National Committee STANSA SC 5140.11I, Paints and varnishes Test methods, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. INTERNATIONALSTANDARDISO11890-2First edition2000-05-15Reference numberISO 11890-2:2000(E) ISO 2000Paints and
9、 varnishes Determination ofvolatile organic compound (VOC) content Part 2:Gas-chromatographic methodPeintures et vernis Dtermination de la teneur en composs organiquesvolatils (COV) Partie 2: Mthode par chromatographie en phase gazeuseISO 11890-2:2000(E)ii ISO 2000 All rights reservedPDF disclaimerT
10、his PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not beedited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file,parties accept the
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12、 PDF-creation parameterswere optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely eventthat a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2000All rights reserved.
13、 Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, elec-tronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs mem-ber body in the country of the requester
14、.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 734 10 79E-mail copyrightiso.chWeb www.iso.chPrinted in SwitzerlandISO 11890-2:2000(E) ISO 2000 All rights reserved iiiContents Page1 Scope . 12 Normative references . 13 Terms and definitions 24 Principle 25 Req
15、uired supplementary information . 26 Apparatus . 37 Reagents 58 Sampling . 59 Procedure . 510 Calculation 711 Expression of results 912 Precision . 913 Test report 10AnnexesA Required supplementary information 11B Examples of gas-chromatographic conditions 12B.1 Hot injection of a water-thinnable pr
16、oduct . 12B.2 Cold injection of a water-thinnable product . 12B.3 Hot injection of a product containing no water . 13B.4 Cold injection of a product containing no water . 13ISO 11890-2:2000(E)iv ISO 2000 All rights reservedForewordISO (the International Organization for Standardization) is a worldwi
17、de federation of national standards bodies (ISOmember bodies). The work of preparing International Standards is normally carried out through ISO technicalcommittees. Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that c
18、ommittee. International organizations, governmental and non-governmental, inliaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commis-sion (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accor
19、dance with the rules given in the ISO/IEC Directives, Part 3.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.Attention is d
20、rawn to the possibility that some of the elements of this part of ISO 11890 may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.International Standard ISO 11890-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes,Subco
21、mmittee SC 10, Test methods for binders for paints and varnishes.ISO 11890 consists of the following parts, under the general title Paints and varnishes Determination of volatile or-ganic compound (VOC) content: Part 1: Difference method Part 2: Gas-chromatographic methodAnnex A forms a normative pa
22、rt of this part of ISO 11890. Annex B of this part of ISO 11890 is for information only.INTERNATIONAL STANDARD ISO 11890-2:2000(E) ISO 2000 All rights reserved 1Paints and varnishes Determination of volatile organiccompound (VOC) content Part 2:Gas-chromatographic method1 ScopeThis part of ISO 11890
23、 is one of a series of standards dealing with the sampling and testing of paints, varnishes andrelated products.It specifies a method for the determination of the volatile organic compound (VOC) content of paints, varnishes andtheir raw materials. This part shall be used where the expected VOC conte
24、nt is greater than by mass and lessthan about by mass. When the VOC content is greater than about by mass, the less complicated methodgiven in ISO 11890-1 may be used.This method assumes that the volatile matter is either water or organic. However, other volatile inorganic compoundsmay be present an
25、d may need to be quantified by another suitable method and allowed for in the calculations.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis part of ISO 11890. For dated references, subsequent amendments to,
26、 or revisions of, any of these publicationsdo not apply. However, parties to agreements based on this part of ISO 11890 are encouraged to investigate thepossibility of applying the most recent editions of the normative documents indicated below. For undated references,the latest edition of the norma
27、tive document referred to applies. Members of ISO and IEC maintain registers ofcurrently valid International Standards.ISO 760:1978, Determination of water Karl Fischer method (General method).ISO 1513:1992, Paints and varnishes Examination and preparation of samples for testing.ISO 2811-1:1997, Pai
28、nts and varnishes Determination of density Part 1: Pyknometer method.ISO 2811-2:1997, Paints and varnishes Determination of density Part 2: Immersed body (plummet) method.ISO 2811-3:1997, Paints and varnishes Determination of density Part 3: Oscillation method.ISO 2811-4:1997, Paints and varnishes D
29、etermination of density Part 4: Pressure cup method.ISO 4618-1:1998, Paints and varnishes Terms and definitions for coating materials Part 1: General terms.ISO 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results Part 1: General prin-ciples and definitions.ISO 5725-2:199
30、4, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic methodfor the determination of repeatability and reproducibility of a standard measurement method.ISO 11890-1:2000, Paints and varnishes Determination of volatile organic compound (VOC) content Part 1:Difference me
31、thod.0,1 %15 % 15 %ISO 11890-2:2000(E)2 ISO 2000 All rights reservedISO 15528:1), Paints, varnishes and raw materials for paints and varnishes Sampling.ASTM D 3960-98, Standard Practice for Determining Volatile Organic Compound (VOC) Content of Paints and Re-lated Coatings.3 Terms and definitionsFor
32、 the purposes of this part of ISO 11890, the following terms and definitions apply.3.1VOCvolatile organic compoundfundamentally, any organic liquid and/or solid that evaporates spontaneously at the prevailing temperature and pres-sure of the atmosphere with which it is in contactISO 4618-1:19983.2VO
33、C contentvolatile organic compound contentthe mass of the volatile organic compounds present in a coating material, as determined under specified conditionsNOTE 1 The properties and the amount of the compounds to be taken into account will depend on the field of application of thecoating material. F
34、or each field of application, the limiting values and the methods of determination or calculation are stipulated byregulations or agreement.NOTE 2 Under certain US governmental legislation, the term VOC is restricted solely to those compounds that are photochemi-cally active in the atmosphere (see A
35、STM D 3960). Any other compound is then defined as being an exempt compound.Adapted from ISO 4618-1:19983.3exempt compoundorganic compound that does not participate in atmospheric photochemical reactions (see note 2 to definition 3.2)3.4ready for usethe state of a product when it is mixed in accorda
36、nce with the manufacturers instructions in the correct proportionsand thinned if required using the correct thinners so that it is ready for application by the approved method4PrincipleAfter preparation of the sample, the VOCs are separated by a gas-chromatographic technique. Either a hot or a colds
37、ample injection system is used, depending on the sample type. Hot injection is the preferred method. After the com-pounds have been identified, they are quantified from the peak areas using an internal standard. Depending on theequipment used, it may also be possible to determine the water content b
38、y this method. A calculation is then per-formed to give the VOC content of the sample.5 Required supplementary informationFor any particular application, the test method specified in this part of ISO 11890 needs to be completed by supple-mentary information. The items of supplementary information ar
39、e given in annex A.1) To be published. (Revision of ISO 842:1984 and ISO 1512:1991)ISO 11890-2:2000(E) ISO 2000 All rights reserved 36Apparatus6.1 Gas chromatographThe apparatus shall be set up and used in accordance with the manufacturers instructions. All of the instrumentalparts coming into conta
40、ct with the test sample shall be made of a material (e.g. glass) which is resistant to the sam-ple and will not change it chemically.6.2 Sample injection system6.2.1 GeneralUse one of the two types specified in 6.2.2 and 6.2.36.2.2 Hot-injection system with sample splitter (preferred system)The inst
41、rument shall have a variable-temperature injection block with a sample splitter. The injection temperatureshall be capable of being set to an accuracy of . The split ratio shall be adjustable and capable of being moni-tored. The sample splitter insert shall contain silanized glass wool to retain non
42、-volatile constituents, and shall becleaned and provided with new glass wool packing or replaced as required to rule out errors due to residues of binderor pigment (i.e. adsorption of compounds). The occurrence of adsorption is revealed by peak tailing, in particular withcomponents of low volatility
43、.6.2.3 Cold-injection system with sample splitterThe cold-injection system shall be provided with temperature programming for heating from ambient to andshall have a sample splitter inlet which is made of an inert material such as glass. The sample splitter shall be pro-vided with silanized glass wo
44、ol packing and shall be maintained as specified in 6.2.2. The split ratio shall be adjusta-ble and capable of being monitored.Method precision will be increased if the injection system, especially the hot-injection system, is coupled to an auto-injector. The manufacturers instructions shall be follo
45、wed when an auto-injector is used.6.2.4 Selection of sample injection systemThe choice between hot injection and cold injection will depend on the type of product under test. It will be necessaryto use the cold-injection system for products which at high temperature release substances which interfer
46、e with thedetermination.Indications of cleavage or decomposition reactions may be obtained by looking for changes in the chromatogram (forexample the occurrence of foreign peaks or an increase or decrease in peak size) at various sample injector temper-atures.The hot-injection system covers all of t
47、he volatile constituents, compounds and cleavage products of the binders andadditives. Cleavage products of the binders or additives which are identical to a constituent of the product can beseparated by a cold-injection system, since they elute later as a result of the programmed increase in inject
48、ion blocktemperature.6.3 OvenThe oven shall be capable of being heated between and both isothermally and under programmedtemperature control. It shall be possible to set the oven temperature to within . The final temperature of the tem-perature programme shall not exceed the maximum operating temper
49、ature of the column (see 6.5).1C300C40C 300C1C ISO 11890-2:2000(E)4 ISO 2000 All rights reserved6.4 DetectorAny of the following three detectors may be used:6.4.1 Flame ionization detector (FID), capable of being operated at temperatures up to . To prevent con-densation, the detector temperature shall be at least above the maximum oven temperature. The detector gassupply, injection volume, split ratio and gain setting shall be optimized so that the signals (peak areas) used for thecalculation are p
