1、BSI Standards PublicationBS ISO 17323:2015Fertilizers and soil conditioners Sulfur Coated Urea (SCU) General requirementsBS ISO 17323:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 17323:2015.The UK participation in its preparation was entrusted to Techni
2、calCommittee CII/37, Fertilisers and related chemicals.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The Britis
3、h Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 76272 7ICS 65.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2015.Am
4、endments issued since publicationDate Text affectedBS ISO 17323:2015 ISO 2015Fertilizers and soil conditioners Sulfur Coated Urea (SCU) General requirementsMatires fertilisantes Ure enrobe de soufre (SCU) Exigences gnralesINTERNATIONAL STANDARDISO17323First edition2015-06-01Reference numberISO 17323
5、:2015(E)BS ISO 17323:2015ISO 17323:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mech
6、anical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, Swi
7、tzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 17323:2015ISO 17323:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references . 13 Terms and definitions . 14 Requirements 24.1 Appearance 24.2 Requirement of sulfur coated urea 25 Sampling and preparation of
8、test sample 25.1 Sampling method 25.1.1 Products in bags . 25.1.2 Products in bulk 25.2 Reduction of samples 35.3 Test sample preparation . 36 Marking and labelling . 37 Packaging, transport, and storage . 4Annex A (informative) Some examples for SCU . 5Bibliography 6 ISO 2015 All rights reserved ii
9、iContents PageBS ISO 17323:2015ISO 17323:2015(E)ForewordISO (the International Organization for 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 me
10、mber 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, also take part in the work. ISO collaborates closely with the International E
11、lectrotechnical 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. In particular the different approval criteria needed for the different type
12、s 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 elements of this document may be the subject of patent rights. ISO shall not be h
13、eld 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 received (see www.iso.org/patents).Any trade name used in this document is informati
14、on given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the f
15、ollowing URL: Foreword Supplementary information .The committee responsible for this document is ISO/TC 134, Fertilizers and soil conditioners.iv ISO 2015 All rights reservedBS ISO 17323:2015ISO 17323:2015(E)IntroductionSulfur Coated Urea (SCU) is a coated slow release fertilizer consisting of urea
16、particles coated with sulfur, which was first developed by the Tennessee Valley Authoritys National Fertilizer Development Center (TVA/NFDC), Alabama in 1961, and produced commercially in 1967. SCU is made by coating urea with sulfur and sealant. The main coating material of SCU is sulfur. Sulfur is
17、 insoluble in water and its chemical properties are stable, thus it is an impermeable coating material. In addition, sulfur itself is a secondary nutrient and it does not pollute the soil when applied appropriately.This International Standard specifies general requirements, sampling, and preparation
18、 of test sample, marking and labelling, packaging, transport, and storage for SCU.NOTE Some countries or regions might have published other standards covering requirements for SCU. ISO 2015 All rights reserved vBS ISO 17323:2015BS ISO 17323:2015Fertilizers and soil conditioners Sulfur Coated Urea (S
19、CU) General requirements1 ScopeThis International Standard specifies general requirements, sampling and preparation of test sample, marking and labelling, packaging, transport, and storage for SCU.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this
20、document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7409, Fertilizers Marking Presentation and declarationsISO 7410, Fertilizers and soil
21、 conditioners Final samples Practical arrangementsISO 7742, Solid fertilizers Reduction of samplesISO 8157, Fertilizers and soil conditioners VocabularyISO 8633, Solid fertilizers Simple sampling method for small lotsISO 17322, Fertilizers and soil conditioners Analytical Methods for SCU3 Terms and
22、definitionsFor the purposes of this document, the following terms and definitions apply.3.1sulfur coated ureaSCUcoated controlled release fertilizer consisting of urea particles coated with sulfurNote 1 to entry: The product is usually further coated with a sealant and, if necessary, a conditioner t
23、o avoid tackiness from the sealant.SOURCE: ISO 8157, 2.2.1.123.2slow-release fertilizersfertilizer, of which, by hydrolysis and/or by biodegradation and/or by limited solubility, the nutrients available to plants is spread over a period of time, when compared to a “reference soluble ” product, e.g.
24、ammonium sulfate, ammonium nitrate, and ureaSOURCE: ISO 8157, 2.1.113.3controlled-release fertilizersfertilizer in which nutrient release is controlled, meeting the stated release rate of nutrient and the stated release time at a specified temperatureNote 1 to entry: Typical examples are coated fert
25、ilizers.SOURCE: ISO 8157, 2.1.12INTERNATIONAL STANDARD ISO 17323:2015(E) ISO 2015 All rights reserved 1BS ISO 17323:2015ISO 17323:2015(E)3.4one day dissolution rate1DDRmass percentage of the dissolution nitrogen to total nitrogen, when SCU is put in static water at 38 C for 24 h3.5seven day dissolut
26、ion rate7DDRmass percentage of the dissolution nitrogen to total nitrogen, when SCU is put in static water at 38 C for seven days4 Requirements4.1 AppearanceThe product shall be in granules.4.2 Requirement of sulfur coated ureaSCU products shall be tested to demonstrate conformance with all requirem
27、ents specified in Table 1 and declared values on containers by the methods specified in ISO 17322.Table 1 Requirements of SCUItem RequirementsTotal Nitrogen (mass fraction) 31 % to 42 %One Day Dissolution Rate (1DDR) 40 %Seven Day Dissolution Rate (7DDR) 60 %Sulfur (S) (mass fraction) 8,0 %Biuret (m
28、ass fraction)a1,2 %Water(H2O)(mass fraction)b1 %Particle size (diameter 1,00 mm to 4,75 mm)b90 %NOTE SCU products are characterized according to different nitrogen release time, however, other requirements of SCU specified by the countries or regions shall be followed. See informative Annex A for ad
29、ditional information.aRegarding biuret content, the related requirements specified by the countries or regions shall be followed.bThe table is only indicative, special water content and particle size values can be negotiated with producers and buyers. The table is indicative as the SCU specification
30、 is determined by the customers specific field and ambient conditions for the selected plant, crop, or vegetation.5 Sampling and preparation of test sample5.1 Sampling method5.1.1 Products in bagsCarry out sampling operation by following the procedure described in ISO 8633. Take care to avoid damage
31、 to, or destruction of, the coating.5.1.2 Products in bulkCarry out sampling operation by following the procedure described in ISO 8633.2 ISO 2015 All rights reservedBS ISO 17323:2015ISO 17323:2015(E)5.2 Reduction of samplesMix all the increments (collected as in 5.1) uniformly and promptly to form
32、a single aggregate sample using a device or by hand. The aggregate sample is reduced to about 1 kg by the riffle sample divider method (see ISO 7742:1988, Annex A.2) or the quartering method (see ISO 7742:1988, Annex A.3). Next, divide into two parts for final laboratory samples. The two laboratory
33、samples are put into two clean and dry glass or plastic containers or any other inert material of adequate resistance capable of maintaining the sample in its original condition. The containers shall be fitted with airtight closures. Carry out all the operations described above as rapidly as possibl
34、e to avoid loss or gain of moisture. Each container shall be secured and sealed following the instruction given in ISO 7410. Each laboratory sample shall be labelled following the instructions given in ISO 7410.The label shall, at minimum, carry the following information:a) name of manufacturer;b) n
35、ame of product;c) manufacturers reference and batch number or production date (if available);d) lot size;e) date of sampling;f) place of sampling;g) signature of the sampler;h) signature and name of the person or his representative on whose premises the sample was taken.One of the containers is used
36、 for further quality analysis, while the other is kept for additional analysis in six months.5.3 Test sample preparationSelect one of the laboratory samples from the two containers obtained in 5.2. Mix the content of the container according to the procedure in ISO 7742. The test sample used for dete
37、rmining total nitrogen, sulfur, biuret, water, and solid content should be reduced to 100 g. Grind this test sample in the grinder until all of the sample has passed through the test sieve of aperture size 0,50 mm. The rest of the content of the container, except the 100 g test sample mentioned abov
38、e, is used for determination of 1DDR, 7DDR, and particle size. Both of the test samples are put into clean and dry bottles to be used for further analysis.6 Marking and labellingThe marking and labelling should follow the legislation. Further information can be provided if appropriate and when the l
39、egislation allows.Any labelling recommendations should conform to the United Nations “Globally Harmonized System of Classification and Labelling of Chemicals” (GHS) and applicable national or regional adoption thereof.Anything referring to the labels should refer to the latest version of ISO standar
40、ds and local/regional legislations.6.1 The following information should appear on the face of the containers:a) total nitrogen content;b) sulfur content;c) date of production;d) net mass; ISO 2015 All rights reserved 3BS ISO 17323:2015ISO 17323:2015(E)e) address and name of the manufacturer.When pro
41、ducts are packaged in tons, only total nitrogen content, sulfur content, net mass, address, and name of the manufacturer should appear.6.2 A products instructions should be printed on the back of containers. The information should include: name of product, nutrient content, method of usage, storage,
42、 and usage precautions.6.3 The single mass value of each container shall be declared (e.g. 50 kg).6.4 All other information required by ISO 7409.7 Packaging, transport, and storageThe applicable national or regional safety guidelines for handling and storage should be followed.7.1 During transportat
43、ion the packaged products should be handled with care to avoid moisture, sunlight, and damage of fertilizer and fertilizer packages.7.2 The products should be stored in a dry, cool place (ambient temperature) away from sunlight and moisture.4 ISO 2015 All rights reservedBS ISO 17323:2015ISO 17323:20
44、15(E)Annex A (informative) Some examples for SCUTable A.1 Examples of SCUItemRequirements (%)Exam-ple IExample IIExample IIIExample IVExample VTotal nitrogen (mass fraction) 39,0 37,0 34,0 31,0 39,7One-day dissolution rate (1DDR) 40 27 15 10 45Seven-day dissolution rate (7DDR) 60 45 30 20 57Sulfur (
45、S) (mass fraction) 8,0 10,0 15,0 20,0 14,0Biuret (mass fraction) 1,2 0,7Water (H2O) (mass fraction) 1,0 0,3Particle size (diameter 1,00 mm to 4,75 mm or 3,35 mm to 5,60 mm) 90NOTE The release time of SCU depends on factors including temperature, moisture, soil microorganism, and wet/dry cyclic condi
46、tion. Therefore, stated release time varies in areas, climates, and cultivation. 1DDR of nutrient, and 7DDR are two important indicators of the SCU for field performance. As can be seen from the examples, increased sulfur content will decrease the 1DDR and 7 DDR values. ISO 2015 All rights reserved
47、5BS ISO 17323:2015ISO 17323:2015(E)Bibliography1 GB 29401-2012, Sulfur Coated Urea (SCU)6 ISO 2015 All rights reservedBS ISO 17323:2015BS ISO 17323:2015ISO 17323:2015(E) ISO 2015 All rights reservedICS 65.080Price based on 6 pagesThis page deliberately left blankBSI is the national body responsible
48、for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards and other standardization products are published by BSI Standards Limited.British Standards Institution (BSI)BSI Group Headquarters389 Chiswick H
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