1、BS ISO 19670:2017Fertilizers and soil conditioners Solid urea aldehyde slowrelease fertilizer GeneralrequirementsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 19670:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 1
2、9670:2017.The UK participation in its preparation was entrusted to Technical Committee CII/37, Fertilisers and related chemicals.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions
3、 of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 86778 1 ICS 65.080 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published unde
4、r the authority of the Standards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 19670:2017 ISO 2017Fertilizers and soil conditioners Solid urea aldehyde slow release fertilizer General requirementsEngrais et amendements
5、 Engrais ure aldhyde solide libration lente Exigences gnralesINTERNATIONAL STANDARDISO19670First edition2017-03Reference numberISO 19670:2017(E)BS ISO 19670:2017ISO 19670:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless
6、otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the addr
7、ess below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 19670:2017ISO 19670:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative refere
8、nces 13 Terms and definitions . 14 Requirements 24.1 Visual inspection . 24.2 Requirement of solid urea aldehyde slow release fertilizer 25 Analytical methods. 35.1 Determination of the appearance . 35.2 Determination of the mass fraction of total nitrogen 35.3 Determination of the mass fraction of
9、ureic nitrogen . 35.4 Determination of the mass fraction of CWIN 35.4.1 Principle 35.4.2 Reagents 35.4.3 Apparatus . 35.4.4 Procedure . 45.4.5 Expression of results 45.5 Determination of the mass fraction of HWIN and AI . 45.5.1 Principle 45.5.2 Reagents 45.5.3 Apparatus . 55.5.4 Procedure . 55.5.5
10、Expression of results 55.6 Determination of the mass fraction of nitrogen from IBDU and CDU . 66 Sampling and preparation of test sample 66.1 Sampling method 66.1.1 Products in bags . 66.1.2 Products in bulk 66.2 Reduction of samples 66.3 Test sample preparation . 67 Marking and labelling . 78 Packa
11、ging, transport and storage . 7Bibliography 8 ISO 2017 All rights reserved iiiContents PageBS ISO 19670:2017ISO 19670:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internationa
12、l 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 right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO,
13、also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1
14、. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the e
15、lements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations rece
16、ived (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment,
17、 as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 134, Fertilizers and soil conditioners.iv ISO 2017
18、 All rights reservedBS ISO 19670:2017ISO 19670:2017(E)IntroductionSolid urea aldehyde slow release fertilizer is a non-coated and chemically synthesized nitrogen fertilizer with slow release effect. In 1924, the first slow release fertilizer patent in the world was issued to urea formaldehyde (UF) a
19、nd in 1955, UF was put into commercial production as the oldest slow release fertilizer. Solid urea aldehyde slow release fertilizer has the longest history of research, use and production among the slow release fertilizers used in practice. At the same time, it is the most widely used of all slow r
20、elease fertilizers.For facilitating international fertilizer trade, it is necessary to have an international and general standard for solid urea aldehyde slow release fertilizers. ISO 2017 All rights reserved vBS ISO 19670:2017BS ISO 19670:2017Fertilizers and soil conditioners Solid urea aldehyde sl
21、ow release fertilizer General requirements1 ScopeThis document specifies general requirements, analytical methods, sampling and preparation of test sample, marking and labelling, packaging, transport and storage for solid urea aldehyde slow release fertilizer.This document applies to pure solid urea
22、 aldehyde slow release fertilizer, i.e. urea formaldehyde (UF), methylene urea (MU), crotonylidene diurea (CDU), isobutylidene diurea (IBDU). This document does not apply to mixtures of nitrogenous fertilizers containing solid urea aldehyde slow release fertilizer.2 Normative referencesThe following
23、 documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5315, F
24、ertilizers Determination of total nitrogen content Titrimetric method after distillationISO 7409, Fertilizers Marking Presentation and declarationsISO 7410, Fertilizers and soil conditioners Final samples Practical arrangementsISO 7742, Solid fertilizers Reduction of samplesISO 8157, Fertilizers and
25、 soil conditioners VocabularyISO 8633, Solid fertilizers Simple sampling method for small lotsISO 19746:2017, Determination of urea content in urea-based fertilizers by high performance liquid chromatography (HPLC)ISO 25705:2016, Fertilizers Determination of urea condensates using high-performance l
26、iquid chromatography (HPLC) Isobutylidenediurea and crotonylidenediurea (method A) and methylen-urea oligomers (method B)3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 8157 and the following apply.ISO and IEC maintain terminological databases for use
27、 in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p s :/ www .iso .org/ obp/ 3.1urea aldehyde slow release fertilizerproducts of reaction between urea and aldehyde(s) that produce a slow
28、release nitrogenous fertilizerEXAMPLE Urea formaldehyde (UF), methylene urea (MU), crotonylidene diurea (CDU), isobutylidene diurea (IBDU).INTERNATIONAL STANDARD ISO 19670:2017(E) ISO 2017 All rights reserved 1BS ISO 19670:2017ISO 19670:2017(E)3.2cold water insoluble nitrogenCWINinsoluble nitrogen f
29、ractions in urea formaldehyde or methylene urea products that are insoluble in phosphate buffer solution (pH 7,5) or distilled water at 25 C during a 15 min period3.3cold water soluble nitrogenCWSNsoluble nitrogen fractions in urea formaldehyde or methylene urea products that are soluble in phosphat
30、e buffer solution (pH 7,5) or distilled water at 25 C during a 15 min periodNote 1 to entry: CWSN = Total nitrogen CWIN3.4hot water insoluble nitrogenHWINinsoluble nitrogen fractions in urea formaldehyde or methylene urea products that are insoluble in phosphate buffer solution (pH 7,5) at 100 C dur
31、ing a 30 min period3.5hot water soluble nitrogenHWSNsoluble nitrogen fractions in urea formaldehyde or methylene urea products that are soluble in phosphate buffer solution (pH 7,5) at 100 C during a 30 min periodNote 1 to entry: HWSN = Total nitrogen HWIN3.6hot water soluble nitrogen onlyHWSN onlys
32、oluble nitrogen fractions in urea formaldehyde or methylene urea products that are soluble in phosphate buffer solution (pH 7,5) at 100 C during a 30 min period and insoluble in phosphate buffer solution (pH 7,5) at 25 C during a 15 min periodNote 1 to entry: HWSN only = HWSN CWSN = CWIN HWIN3.7acti
33、vity indexAIpercentage of CWIN (3.2) that is solubilised in hot water (HWSN only) (3.6)Note 1 to entry: AI =CWIN HWINCWIN100Note 2 to entry: CWIN and HWIN in Note 1 are expressed in the mass fraction (%).Note 3 to entry: A higher AI indicates better slow release characteristics of urea formaldehyde
34、fertilizer.4 Requirements4.1 Visual inspectionThe product shall be in powder, granules, prills, pellets, pastilles, chips or other solid forms. Visually inspect for the presence of contaminant and foreign matter.4.2 Requirement of solid urea aldehyde slow release fertilizerSolid urea aldehyde slow r
35、elease fertilizer shall be tested to demonstrate conformance with all the requirements specified in Tables 1 and 2 respectively, and declared values on containers.2 ISO 2017 All rights reservedBS ISO 19670:2017ISO 19670:2017(E)Table 1 Requirements of urea formaldehyde/methylene urea fertilizerItem R
36、equirementsTotal nitrogen (TN) (mass fraction) 36 %Ureic nitrogen (mass fraction) 5 %HWSN (mass fraction) 3/5 of the declared total nitrogen contentAI 40 %The requirements specified by national/regional legislation shall be followed when urea formaldehyde/methylene ureas are covered by legislation.T
37、able 2 Requirements of IBDU and CDUItem RequirementsTotal nitrogen (mass fraction) 28 %Ureic nitrogen (mass fraction) 3 %Nitrogen from IBDU or CDU (mass fraction) 25 %The requirements specified by the national/regional legislation shall be followed when IBDU or CDU are covered by legislation.5 Analy
38、tical methods5.1 Determination of the appearanceIt shall be determined by visual method.5.2 Determination of the mass fraction of total nitrogenIt shall be determined in accordance with ISO 5315.5.3 Determination of the mass fraction of ureic nitrogenIt shall be determined in accordance with ISO 197
39、46.5.4 Determination of the mass fraction of CWIN5.4.1 PrincipleExtraction of the test portion in phosphate buffer solution (pH 7,5) or distilled water at 25 C. Filtration of insoluble residue, washing and determination of nitrogen content in insoluble residue.5.4.2 Reagents5.4.2.1 Phosphate buffer
40、solution (pH 7,5). Dissolve 14,3 g KH2PO4and 91,0 g K2HPO4in water and dilute to 1 l. Dilute 100 ml of this solution to 1 l.5.4.2.2 Anhydrous ethanol.5.4.2.3 Reagents listed in ISO 5315.5.4.3 Apparatus5.4.3.1 Usual laboratory apparatus. ISO 2017 All rights reserved 3BS ISO 19670:2017ISO 19670:2017(E
41、)5.4.3.2 Water bath, capable of being maintained at (25 2) C.5.4.3.3 Quantitative filter paper (intermediate speed).5.4.3.4 Apparatus listed in ISO 5315.5.4.4 ProcedureTwo analyses shall be performed simultaneously for the determination.Place 1 g to 1,4 g test portion (accurate to 0,000 1 g) in 50 m
42、l beaker wet with ethanol (5.4.2.2). Add 20 ml phosphate buffer solution (5.4.2.1) or distilled water and let stand 15 min in the water bath maintained at 25 C 2 C and stir at 5 min intervals during standing. Transfer the supernate to a piece of filter paper (5.4.3.3) in a long-stem funnel and wash
43、the residue four or five times by decanting with water of 25 C 2 C. Finally, transfer all the residue to the filter paper and complete washing until the filtrate measures 250 ml. Determine nitrogen content in the filter paper and the residue in accordance with ISO 5315.Carry out a blank test at the
44、same time as the determination, using the same procedure, using the same reagents, but omitting the test portion.5.4.5 Expression of resultsThe CWIN content, w1, expressed as a mass fraction (%), is given by Formula (1):wVV cm112 1114 011 000100=() ,(1)whereV1is the volume, in millilitres, of sodium
45、 hydroxide standard solution used for the blank test;V2is the volume, in millilitres, of sodium hydroxide standard solution used for the determination;c1is the concentration, in mol per litre, of sodium hydroxide standard solution used;m1is the mass, in grams, of the test portion.The calculation res
46、ults are accurate to two digits after the decimal point. The determination result is the arithmetic average of the duplicate determination results.5.5 Determination of the mass fraction of HWIN and AI5.5.1 PrincipleExtraction of the test portion in phosphate buffer solution (pH 7,5) at 100 C. Filtra
47、tion of insoluble residue, washing and determination of nitrogen content in insoluble residue.5.5.2 Reagents5.5.2.1 Reagents listed in 5.4.2.5.5.2.2 Celite.4 ISO 2017 All rights reservedBS ISO 19670:2017ISO 19670:2017(E)5.5.3 Apparatus5.5.3.1 Usual laboratory apparatus.5.5.3.2 Water bath, capable of
48、 being maintained at (100 2) C.5.5.3.3 Apparatus listed in 5.4.3.3 and 5.4.3.4.5.5.4 ProcedureTwo analyses shall be performed simultaneously for the determination.Place an accurately weighed test portion containing 0,12 g CWIN (accurate to 0,000 1 g) in a 250 ml tall-form beaker. Add 100 ml 100 C ph
49、osphate buffer solution (5.4.2.1) from a graduated cylinder to the test portion, stir, cover and immerse promptly in a boiling water bath (5.5.3.2) so that liquid in the beaker is below the water level in the water bath. Maintain the water bath at 98 C to 100 C, check with a thermometer and stir at 10 min intervals. After exactly 30 min, remove the beaker from the water bath and filter promptly through a piece of filter paper (5.4.3.3). If filtration t
