BS EN 1482-2-2007 Fertilizers and liming materials - Sampling and sample preparation - Sample preparation《肥料和加石灰材料 抽样和样品制备 样品制备》.pdf

1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58preparation Part 2: Sample preparationThe European Standard EN 1482-2:2007 has the status of a Brit

2、ish StandardICS 65.080Fertilizers and liming materials Sampling and sample BRITISH STANDARDBS EN 1482-2:2007BS EN 1482-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2007 BSI 2007ISBN 978 0 580 50289 7Amendments issued sinc

3、e publicationAmd. No. Date CommentsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was pu

4、blished by BSI. It is the UK implementation of EN 1482-2:2007. This standard, together with BS EN 1482-1:2007, supersedes BS EN 1482:1996, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee CII/37, Fertilizers and related chemicals.A list of organizations

5、 represented on CII/37 can be obtained on request to its secretary.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1482-2January 2007ICS 65.080 Supersedes EN 1482:1996 English VersionFertilizers and liming materials - Sampling and samplepreparation - Part 2: Sample preparationEngrais et amendement

6、s minraux basiques -Echantillonnage et prparation des chantillons - Partie 2:Prparation des chantillonsDngemittel und Calcium-/Magnesium-Bodenverbesserungsmittel - Probenahme undProbenvorbereitung - Teil 2: ProbenvorbereitungThis European Standard was approved by CEN on 15 December 2006.CEN members

7、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

8、the CEN Management Centre 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 CEN Management Centre has the same

9、status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania

10、, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldw

11、ide for CEN national Members.Ref. No. EN 1482-2:2007: EEN 1482-2:2007 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 6 2 Normative references 6 3 Terms and definitions .6 4 Principle7 5 Apparatus .7 6 Procedure .7 7 Labelling .10 8 Sample preparation report10 Bibliography 12 EN 1482-2:2007 (E

12、) 3 Foreword This document (EN 1482-2:2007) has been prepared by Technical Committee CEN/TC 260 “Fertilizers and liming materials”, 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 endor

13、sement, at the latest by July 2007, and conflicting national standards shall be withdrawn at the latest by July 2007. Together with Part 1, this document supersedes EN 1482:1996. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Tr

14、ade Association to provide a means of conforming to Essential Requirements of the Regulation (EC) No 2003/2003 of the European Parliament and of the Council of 13 October 2003 relating to fertilizers. EN 1482, Fertilizers and liming materials Sampling and sample preparation” consists of two parts: P

15、art 1: Sampling Part 2: Sample preparation According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany,

16、 Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1482-2:2007 (E) 4 Introduction This European Standard (EN 1482-2) covers the following aspects of sam

17、ple preparation, derived from the International Standards and documents indicated but presented in a simplified and condensed form. The titles of the International Standards are given in the Bibliography. Reduction and preparation of samples for analysis: ISO 7410, ISO 7742, ISO 8358 and EEC 77/535

18、(superseded by Regulation (EC) No 2003/2003); Sampling reports: ISO 5306 and EEC 77/535 (superseded by Regulation (EC) No 2003/2003). EN 1482-1 covers the sampling of fertilizers and liming materials. Figure 1 gives a schematic diagram of the sampling and sample preparation process for solids. EN 14

19、82-2:2007 (E) 5 Figure 1 Schematic diagram of sampling process for solids EN 1482-2:2007 (E) 6 1 Scope This European Standard specifies methods for the reduction and preparation of samples of fertilizers and liming materials and sets out the requirements for sample preparation reports. It also speci

20、fies methods for the preparation of test samples and test portions from laboratory samples of fertilizer for subsequent chemical or physical analysis. It does not cover the preparation of samples for certain physical tests which require test portions of more than 2 kg. It is applicable to all fertil

21、izers. NOTE The term fertilizer is used throughout the body of this European Standard and should be taken to include liming materials unless otherwise indicated. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, on

22、ly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1482-1:2007, Fertilizers and liming materials Sampling and sample preparation Part 1: Sampling ISO 3310-1, Test sieves Technical requirements and testing Part 1:

23、 Test sieves of metal wire cloth 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 division process of producing a number of representative smaller portions, approximately equal in mass to each other, from a larger mass 3.2 final sample represe

24、ntative part of the reduced sample or, where no intermediate reduction is required, of the aggregate sample NOTE Often, more than one sample is prepared, at the same time, from the reduced sample (or from the aggregate sample). One or more of these final samples is used as a laboratory sample or as

25、laboratory samples, while others may be stored for reference purposes. 3.3 laboratory sample final sample intended for laboratory inspection or testing 3.4 reduction process of producing a representative smaller mass of fertilizer from a larger mass, with the remainder being discarded 3.5 test porti

26、on quantity of material taken from the test sample (or if both are the same, from the laboratory sample) and on which the test or observation is actually carried out 3.6 test sample sample prepared from the laboratory sample and from which test portions are taken EN 1482-2:2007 (E) 7 4 Principle Red

27、uction and division of the laboratory sample, as necessary, to produce test samples. Preparation of test portions from the test samples by division, with or without previous grinding, or by combination, as appropriate. 5 Apparatus 5.1 General Apparatus used in the preparation and storage of samples

28、shall be clean and dry and made from materials which will not affect the characteristics of the fertilizer. 5.2 Rotary sample divider, conforming to the requirements specified in EN 1482-1:2007, 5.6.3, or riffle divider conforming to the requirements specified in EN 1482-1:2007, 5.7.2. 5.3 Sample gr

29、inder, capable of taking the whole sample at one pass and, preferably, totally enclosed. It shall have a screen, or other mechanism without a screen, which allows the ground material to pass through the machine into a collecting vessel and away from the cutters or grinding discs, to avoid over-grind

30、ing. In the case of a grinder with screens, the fineness of grind can be adjusted by the fitting of different mesh screens. Grinding shall continue until as much as possible of the fertilizer has passed through the machine. NOTE If the grinder is of the open type, the moisture content of the fertili

31、zer can change significantly during grinding. Any machine used for grinding samples as required by this European Standard shall be checked for satisfactory performance. Particular points to be checked are: a) the fineness of grinding achieved; b) the temperature rise of the material being ground (se

32、e 6.3); c) non-contamination of the sample. 5.4 Mortar and pestle, of suitable material and size. 5.5 Test sieves, conforming to ISO 3310-1 of nominal aperture sizes 1,0 mm, 0,5 mm and 0,18 mm. NOTE In cases where national regulations or the nature of the material require sieves of different apertur

33、e sizes, these may be used but the fact should be noted in the sample preparation report. 5.6 Sample containers, made of plastics material and/or glass, or any other material of adequate resistance and fitted with air-tight closures. 6 Procedure 6.1 General All operations connected with this procedu

34、re shall be carried out as quickly as possible to minimize the absorption or loss of water. 6.2 Preparation of test samples in their original condition Thoroughly mix the whole of the laboratory sample and follow one of the procedures described in EN 1482-1:2007, clause 6 to reduce (if necessary) an

35、d divide the total mass to obtain the appropriate number of representative test samples, each of about 0,5 kg in mass. EN 1482-2:2007 (E) 8 Reject, by random selection, any test samples in excess of those required and place the remaining N test samples in some of the air-tight containers (5.6). NOTE

36、 The maximum number of test samples which can be produced by this method depends on the mass of the original laboratory sample. The minimum number of 0,5 kg test samples which is required depends on the nature of the analyses to be carried out and the number of replicates required. In some instances

37、, when only chemical analyses are to be carried out and only a small laboratory sample is available, the whole of this sample is used as the test sample. 6.3 Further preparation of test samples which are to remain in their original condition 6.3.1 General Test samples in this category include all th

38、ose for physical testing, those for certain chemical analyses and those which, by their nature, should not be ground. 6.3.2 Preparation of test portions for physical testing If the mass of the test portion required is greater than 0,5 kg, select at random two or more of the N test samples (6.2). Mix

39、 these together and, if the mass required is not an exact multiple of 0,5 kg, reduce it to the required size by following one of the procedures described in EN 1482-1:2007, clause 6. If the mass of test portion required is less than 0,5 kg, select at random one of the N test samples (6.2) and contin

40、ue the reduction and division following one of the procedures described in EN 1482-1:2007, clause 6 until test portions of the required mass for the test are obtained. During the division process, replicate test portions are obtained and these are suitable for replicate tests without further treatme

41、nt. Discard any unwanted material. The representativity of the sample might be lost during this further subdivision. 6.3.3 Preparation of test portions for moisture analysis Do not grind test portions for moisture analysis if grinding is likely to alter the moisture content of the fertilizer. NOTE S

42、ome types of grinding mill can alter the moisture content during processing. For example: single-pass hammer mills with interchangeable screens do not alter the moisture content; static sample mills of the coffee grinder type tend to reduce the sample moisture content unless the processing time is k

43、ept to an absolute minimum. Cyclone type mills shall not be used as the rapid airflow in the cyclone causes a reduction in moisture content. If necessary, the size of the larger particles can be reduced by crushing. Select, at random, one of the N test samples (6.2) and carry out reduction and divis

44、ion, following one of the procedures described in EN 1482-1:2007, clause 6 until test portions of the required size are obtained. 6.3.4 Preparation of test portions for other chemical analyses Some chemical analyses have to be performed on test portions taken from samples which have not been ground.

45、 Reference should be made to this in the relevant analytical method. Some fertilizers, for example ammonium nitrate, might decompose during grinding and it is essential that these are not ground before starting analysis. Select, at random, one of the N test samples (6.2) and carry out reduction and

46、division following one of the procedures described in EN 1482-1:2007, clause 6 until test portions of the required size are obtained. EN 1482-2:2007 (E) 9 6.4 Further preparation of test samples for chemical analysis 6.4.1 General NOTE See 6.3.3 and 6.3.4 for those special cases where the test sampl

47、e should remain in its original condition. Take care during the following grinding operations that the temperature of the fertilizer does not rise above 45 C, to avoid loss of ammonia etc. Select, at random, one of the N test samples (6.2) and either follow the procedure described in 6.4.2 or, if a

48、suitable sample grinder is not available, that described in 6.4.3, or, if special treatment is necessary, that described in 6.5, 6.6 or 6.7 as appropriate. For fluid fertilizers, follow the procedure described in 6.8. 6.4.2 Use of sample grinder Grind the test sample in the grinder (5.3) until all t

49、he sample has passed through, or for the specified time, depending on the type of grinder. To check that the grinding has been adequate, thoroughly mix a small representative portion of the ground sample and sieve it through the test sieve of aperture size 0,5 mm (5.5) and discard it. If the whole of this portion does not pass through the sieve, return the sample to the grinder and repeat the grinding until satisfactory grinding is achieved. NOTE For mixtures containing one or more very hard components, it might b