1、STD*BSI BS EN L2CILiB-ENGL 1977 W Lb24bb7 ObZL31L BRITISH STANDARD Solid fertilizers and liming materials - Determination of moisture content - Gravimetric method by drying at (105 2) “C 737 m BS EN 12048 : 1997 * * m The European Standard EN 12048 : 1996 has the status of a British Standard ICs 66.
2、080 NO COPYING WITIIOIJT RSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN L2048-ENGL 1777 = lb24bb7 Ob21312 b73 Amd. No. BS EN 12048 : 1997 Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technid Committee
3、 CIv37, Fertilizers and related chemicals, upon which the following bodies were represented: Association of Public Analysts British Aggregate Construction Materials Inmes British Coal Corporation Chemical Industries Association Consumers Association Deparment of We and Industry (Laboratory of the Go
4、vernment Chemist) Fertiliser Manufacturers Association Ltd. Horticultural Wes Association institute of lhding Standards Administrati on Mmistry of Agriculture, Fisheries and Food Water Services Association of England and Wales This British Standard, having been prepared under the direction of the Se
5、ctor Board for Materiais and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 June 1997 8 BSI 1997 Amendments issued since publication I I The foiiowing BSI references reiate to the work on this standard Committ+e reference CnB7 Draft for comment 91/527
6、66 DC ISBN O 680 27410 1 I - - STD-BSI BS EN L20Li-ENGL 1777 Lb24bb7 Ob21313 50T BS EN 12048 : 1997 Contents Page Committees responsible Inside front cover Naiional foreword 11 Foreword 2 Method 1 Scope 3 2 Normative reference 3 3 Principle 3 4 Material 3 5 APP- 6 7 Procedure Preparation of the test
7、 sample 3 3 3 8 Expressionofresults 3 9 Testreport 3 Annexes A (informative) Precision 4 ZA (informative) Bibliography 4 * * rJ7 O BSI 1997 i STD.BS1 BS EN 12048-ENGL 1777 M 1b2Libb7 Ob213111 44b W BS EN 12048 : 1997 National foreword This British Standard has been prepared by Technical Committee CI
8、V37 and is the Engiish ianguage version of EN 12048 : 1996 Solid f - ground rock phosphates; - partMy solubilized rock phosphates. - natural phosphates; The method is not applicable to hydrated or burnt lime, and to ammonium compounds or magnesium Sulfates. 6 Preparation of the test sample I Prepare
9、 the test sample, without grinding, in accordance with EN 1482. If nec-, quickly crush (not grind) the material in a mortar. Mix ail the material and immediately take the test portion (7.1). NOTE 1. It is advisable to crush the matenal in an atmosphere of relative humiity 40 % to 60 %. 7 Procedure 7
10、.1 Test portion Dry the weighmg bottle (6.1) in the oven (6.4), set at 105 OC, for 2 h. AUow to cool to ambient temperaime in a desiccaor. Weigh to the nearest 0,001 g about 10 g of the test sample into the tared weighing bottle. 7.2 Determination 2 Normative reference This European Standard incorpo
11、rates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the tat and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this Europea
12、n Standard only when incorporated in it by amendment or revision. For undakd references the latest edition of the publication referred to applies. m EN 1482 : Sampling of solicl frizers and iming 4 4 I1996 maw 3 Principle Drying a test portion at (105 f 2) “C for 5 h and determination of the resulti
13、ng loss in mass. 4 Material 4.1 Silica gel desiccant, self-indicaing, particle size 2 mm to 5 mm. Activate the silica gel, immediately prior to use, by placing about 100 g in the evaporating basin (6.3) and transferring the basin to the oven (6.4), set at 105 OC, for 2 h. T1.ansfer the basin with it
14、s contents to a desiccator and allow to cool to ambient temperature. Page 3 m12048:1996 Place the unstoppered weighing bottle (6.1) containing the test portion, and the stopper, in the oven (6.4), set at 105 OC, for 5 h. lhnsfer the weighing bottle and the stopper to the desiccator (6.2) and ailow t
15、o cool to ambient temperature. Open the desiccator, quickly restopper the weighmg bottle and weigh the bottle and its contents to the nearest 0,001 g. 8 Expression of results The moisture content of the fertilizer or of the liming material, expressed as a percentage by mass, is given by the formula.
16、 mo mo-mi x 100 where: rr ml is the mass, in grams, of the test portion before drying; is the mas, in grams, of the test poAon after drying. Round the result, the mean of at least two determinations, to 0,1% (mim). 9 Wst report The test report shall include the following information: , a) a referenc
17、e to this European Standard I 5 Apparatus ordinary laboratory apparatus and, in particular, the 6.1 Weighing bottle, 70 mm to 80 mm diameter, fitted with a stopper. 6.2 Vacuum desiccaW, internai diameter b) the method of samphng and sample preparation; c) the results and the method of expression d,
18、d) ail information necessary for the complete idenification of the sample; e) any unusual features noted during the determination; following. I l about 200 mm, containing silica gel desiccant (4.1) 6.3 Evaporating basin, intend diameter about 100 mm. f) any operation not included in this European St
19、andard or in the European Standard to which reference is made, or regarded as optionai. 6.4 Ouen, capable of being controlled at (105 f 2) “C. BSI 1997 STD.BSI BS EN L20Li8-ENGL 1997 = Lb24bb9 Ob21318 OL Page 4 EN12048:1996 Annex A (informative) Precision Annex ZA (informative) I Bibliography I IS0
20、3963 : 1977 Ferti.Jim - Sampling from a A.l General The foilowing precision data were determined from an experiment conducted in 1982 involving 21 laboratories using one sample of each of the following fertilizers ammonium suifate; naturai phosphate; superphosphate 18 % (granuiar and also powdered).
21、 The method used employed the grinding and sieving of the sample whereas the published method involves crushing, and therefore these data are included for information only A.2 Repeatability The Merence between two single test results obtained from identical test material by one analyst using the sam
22、e apparatus within a short timeinted should exceed the repeatability limit, r, given by the following equation, on average not more than once in 20 cases in the normal and correct operation of the method where: conveyor by stopping the belt samples lots 7742 : 1988 sol.id - Reductio?z of IS0 8633 :
23、1992 Simple sampling method for smu r = 0,15 fi m is the arithmetic mean of the two test results (Le. two determinations). A.3 Reproducibility The difference between two single and independent test results found by two analysts working in different laboratories ushg identical test material should ex
24、ceed the reproducibility limit, R, given by the following equation, on average not more than once in 20 cases in the nonnal and correct operation of the method where: R = 0,6 M is the arithmetic mean of the two test results (Le. two determinations) O BSI 1997 STD-BSI BS EN 12048-ENGL 1997 m 1b24bb9
25、Ob21319 T28 m BS EN 12048 : 1997 List of references See nationai foreword O BSI 1997 STD-BSI BS EN 1Z048-ENGL 1777 = 1b2Libb7 Ob21320 7LiT BS EN 12048 : 1997 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing Br
26、itish Standards. It presents the UK view on standards in Europe and at the intedonal level. It is incorporated by Royal Charter. Contract requirements A British Standard does not purport to include ail the necessary provisions of a contract Users of British Standards are responsible for their correc
27、t application. Revisions British Standards are updated by amendment or revision. Users of British Stankds should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an
28、 inaccuray or ambiguity while using this British Standard would inform the Secretary of the responsible technicai committee, the identity of which can be found on the inside front cover. Tel 0181 996 9000; Fax: 0181 996 7400. BSI offers members an individual updating service ded PLUS which ensures t
29、hat subscribers automatically receive the latest editions of standards. Buying standards Orders for ail BSI, international and foreign standards publications should be addressed to Customer Services, Sales Department at Chiswick Tel: 0181 996 7000; Fax: 0181 996 7001. In response to orders for inted
30、onal standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library, the Standardl
31、ine Database, the BSI Wormation “ethnology Service (BITS) and its Technid Help to Exporters Service. Contact the Information Department at Chiswick Tel: 0181 996 7111; Fax: 0181 996 7048. Subscribing members of BSI are kept up to date with standards developments and receive subsbntial discounts on t
32、he purchase price of standards. For details of these and other benefits contact Customer Services, Membership at Chiswick Tel 0181 996 7002; Fax: 0181 996 7001. Copyright Copyright subsists in ail BSI publications. BSI also holds the copyright, in the UK, of the publicaions of the international stan
33、dardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or l-mnsmim in any form or by any means - electronic, photocopying, recording or otherwise - without prior written permission from BSI. This does not p
34、reclude the free use, in the coume of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior writkn permission of BSI must be obtained if permission is granted, the terms may include royaity payments or a licensing agreement. Details and abvice can be obtained from the copyright Manager, BSI, 389 Chiswick High Road, London W4 4AL
