EN ISO 15715-2006 en Binders for paints and varnishes - Determination of turbidity《色漆和清漆用漆基 混合度测定》.pdf

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1、BRITISH STANDARDBS EN ISO 15715:2006Incorporatingamendment No. 1 (to renumber BS ISO 15715:2003 as BS EN ISO 15715:2006)Binders for paints and varnishes Determination of turbidityThe European Standard EN ISO 15715:2006 has the status of a British StandardICS 87.060.20g49g50g3g38g50g51g60g44g49g42g3g

2、58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 15715:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 4 Augu

3、st 2003 BSI 2006ISBN 0 580 42377 8National forewordThis British Standard is the official English language version of EN ISO 15715:2006. It is identical with ISO 15715:2003.The UK participation in its preparation was entrusted to Technical Committee STI/3, Paint media and related products, which has

4、the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogueunder the section entitl

5、ed “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance w

6、ith a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related internatio

7、nal and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 6, an inside back cover and a back cover.The BSI copyright notice

8、displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date Comments16198 31 March 2006 Renumbers BS ISO 15715:2003 as BS EN ISO 15715:2006EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 15715February 2006ICS 87.060.20English VersionB

9、inders for paints and varnishes - Determination of turbidity (ISO15715:2003)Liants pour peintures et vernis - Dtermination de laturbidit (ISO 15715:2003)Bindemittel fr Beschichtungsstoffe - Bestimmung derTrbung (ISO 15715:2003)This European Standard was approved by CEN on 16 January 2006.CEN members

10、 are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to

11、 the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same sta

12、tus as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, S

13、lovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN n

14、ational Members.Ref. No. EN ISO 15715:2006: EForeword The text of ISO 15715:2003 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 15715:2006 by Technical Committee CEN/TC 139 “Paint

15、s and varnishes“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2006, and conflicting national standards shall be withdrawn at the latest by Augus

16、t 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, La

17、tvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement noticeThe text of ISO 15715:2003 has been approved by CEN as EN ISO 15715:2006 without any modifications. EN ISO 15715:2006Reference numb

18、erISO 15715:2003(E)OSI 3002INTERNATIONALSTANDARDISO15715First edition2003-03-01Binders for paints and varnishes Determination of turbidity Liants pour peintures et vernis Dtermination de la turbidit EN ISO 15715:2006IS:51751 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In cc

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23、1121-HC 02 avleT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o groWe bwww.is.o groii ISO 3002 Allr ihgtsser edevrIS:51751 O3002(E) I SO 3002 All irhgts seredevr iiiContents PageForeword iv1 Scope 12 Terms and definitions. 13 Principle . 14 Apparatus. 25 Calibration 26 Procedure. 37

24、Expression of results 38 Precision 39 Test report 3Annex A (normative) Preparation of formazine standards 4Annex B (informative) Use of additional measurement angles . 5Bibliography . 6EN ISO 15715:2006IS:51751 O3002(E) iv I SO 3002 All irhgts seredevrForeword ISO (the International Organization for

25、 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 established has the

26、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 (IEC) on all matters of electrotechnical standardization. Internatio

27、nal Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication a

28、s an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. I

29、SO 15715 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 10, Test methods for binders for paints and varnishes.EN ISO 15715:2006INTENRATIONAL TSANDADR IS:51751 O3002(E)I SO 3002 All irhgts seredevr 1Binders for paints and varnishes Determination of turbidity 1 Sc

30、ope The measurement of the turbidity of liquids can be carried out visually or by instrument, but visual methods can be subjective. This method measures instrumentally the scattering of light by the insoluble matter in a liquid and therefore gives an objective determination of turbidity. Turbidity i

31、n liquids is caused by the presence of undissolved matter (i.e. non-settling flocculation, gels or other suspended matter such as particles or droplets). In the case of finely dispersed undissolved matter, the turbidity may be determined by measuring the intensity of the light which is scattered by

32、the particles when a beam of light is passed through the liquid. This International Standard specifies an instrumental method for determining the turbidity of clear liquids. It is applicable to resins and resin solutions, solvents, clear coating materials, monomers and any other liquids where clarit

33、y is specified. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1turbidity reduction in the transparency of a liquid caused by the presence of undissolved matter 3 Principle3.1 Principle of the methodA liquid sample is placed in an optical cell

34、 or glass jar and the turbidity measured on a ratio-recording turbidimeter. The instrument is calibrated in formazine turbidity units (FTUs). The turbidity of the sample can thus be read directly in FTUs. The readings are therefore insensitive to colour. 3.2 General principles of turbidity measureme

35、ntA liquid sample coloured by dissolved substances is a homogeneous system that only attenuates radiation passing through the sample. A sample containing undissolved substances not only attenuates the incident radiation but, in addition, the insoluble particles diffuse the radiation, unequally, in a

36、ll directions (see Figure 1). By determining the ratio between the light levels at 0 and 90, a measure of the degree of scattering is obtained. A factor F relates this ratio to formazine concentration units. The degree of scattering measured depends on the measurement angle, the particle size, the c

37、oncentration of the particles, the wavelength of the light source and the complex refractive index of the particles relative to the liquid. NOTE Instrument-to-instrument comparisons are only possible if the apparatus is used in accordance with this International Standard and the same principles of m

38、easurement are applied. EN ISO 15715:2006IS:51751 O3002(E) 2 I SO 3002 All irhgts seredevrFigure 1 Principle of measurement 4 Apparatus 4.1 Turbidimeter Any instrument may be used provided that it complies with the following requirements: a) the wavelength O of the incident light shall be (860 r 30)

39、 nm; b) the spectral bandwidth O of the incident light shall be less than or equal to 60 nm; c) the incident light beam shall not be divergent, and any convergence shall not exceed 1,5; d) the angle between the axis of the incident beam and that at which the scattered radiation is measured shall be

40、(90 r 1) (see Annex B); e) the angle subtended by the aperture in the test sample shall be less than 20. 4.2 Measurement cells The turbidity of the sample shall be measured with the test sample either in optical cells meeting the specifications of the instrument manufacturer or in disposable glass j

41、ars. If disposable glass jars are used, the following additional requirements apply: the jar shall be cylindrical; the diameter of the jar shall be between 5 cm and 11 cm; the instrument shall have provisions for automatically centering and rotating the jar during measurement; the part of the sample

42、 chamber not occupied by the jar shall be kept filled with tap water flowing continuously through the chamber, to eliminate refraction effects caused by inhomogeneous sample jars. 5 Calibration Calibrate the apparatus, operating it in accordance with the manufacturers instructions, using formazine s

43、tandard matching solutions. For the preparation of the formazine standards, see Annex A. Plot a graph comprising at least five points in each measurement range (for example for the range 0,1 FTU to 5,0 FTU, make measurements at 0,5 FTU, 1,0 FTU, 2,0 FTU, 3,0 FTU and 4,0 FTU). Repeat the calibration

44、at frequent intervals. NOTE A turbidity corresponding to 0 FTU cannot be measured because of scattering of radiation by the molecules themselves. EN ISO 15715:2006IS:51751 O3002(E) I SO 3002 All irhgts seredevr 36 Procedure Carefully fill a clean, dry optical cell or glass jar to within a centimetre

45、 of the top, pouring the sample down the side of the cell or jar to minimize bubble formation. Cap the cell or jar tightly. If bubbles are observed, allow them to dissipate before making the measurement. Bubbles will produce erroneously high results. In most cases, bubbles may be removed rapidly by

46、using an ultrasonic bath, centrifuging, warming or placing under a slight vacuum. Verify that any such treatment of the test sample does not alter its turbidity. Wipe off any dirt or drips, with the aid of a suitable solvent, from the outside of the cell or jar before making the measurement. Conditi

47、on the test sample to room temperature. Place the cell or jar in the instrument, start the measurement and record the reading. Use the lowest range setting possible. 7 Expression of results Report the result in formazine turbidity units (FTUs), as follows: a) if the turbidity is less than 1 FTU, to

48、the nearest 0,01 FTU; b) if the turbidity is greater than or equal to 1 FTU but less than 10 FTU, to the nearest 0,1 FTU; c) if the turbidity is greater than or equal to 10 FTU but less than 100 FTU, to the nearest 1 FTU; d) if the turbidity is greater than or equal to 100 FTU, to the nearest 10 FTU

49、. 8 Precision No data available yet. 9 Test report The test report shall contain at least the following information: a) a reference to this International Standard (ISO 15715); b) all details necessary to identify the product tested; c) the result of the test, as indicated in Clause 7; d) details of any deviation from the test method specified, as well as details of any circumstances which might have influenced the result; e) details of any items which were agreed between the interested parties; f) the date of