1、BSI Standards PublicationBS ISO 18645:2016Fertilizers and soil conditioners Water soluble fertilizer General requirementsBS ISO 18645:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 18645:2016. The UK participation in its preparation was entrusted to Techn
2、icalCommittee 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 of a contract. Users are responsible for its correct application. The Br
3、itish Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 82554 5 ICS 65.080 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 Marc
4、h 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 18645:2016 ISO 2016Fertilizers and soil conditioners Water soluble fertilizer General requirementsMatires fertilisantes Engrais soluble dans leau Exigences gnralesINTERNATIONAL STANDARDISO18645First edition2016-0
5、3-15Reference numberISO 18645:2016(E)BS ISO 18645:2016ISO 18645:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by
6、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 address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 40
7、1CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 18645:2016ISO 18645:2016(E)Foreword iv1 Scope . 12 Normative references 13 Requirement . 24 Test method . 34.1 Visual inspection for foreign matter . 34.2 Determination of nitrogen, phosph
8、orus and potassium contents . 34.3 Determination of calcium, magnesium and sulphur contents . 34.4 Determination of molybdenum, boron and manganese, zinc, copper and iron contents. 44.5 Determination of the chelated fraction of micro-nutrients 44.6 Determination of the mass fraction of water insolub
9、le matter . 44.6.1 Principle 44.6.2 Reagents and materials 44.6.3 Apparatus . 44.6.4 Ambient temperature controlled at (20 10) C . 44.6.5 Test procedure . 44.6.6 Calculation of the test result 54.6.7 Tolerance 54.7 Determination of the pH value 54.8 Determination of arsenic, cadmium, lead, chromium
10、and mercury contents 54.9 Determination of biuret content 54.10 Determination of mass fraction of chloride . 55 Sampling and preparation of test sample 55.1 Sampling method 55.1.1 Products in bags . 55.1.2 Products in bulk 55.2 Reduction of samples 65.3 Test sample preparation . 66 Marking and label
11、ling . 67 Package, transport and storage 7Bibliography 8 ISO 2016 All rights reserved iiiContents PageBS ISO 18645:2016ISO 18645:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing I
12、nternational 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
13、 with ISO, 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 Directi
14、ves, Part 1. 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
15、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. 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 declarati
16、ons received (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 meaning of ISO specific terms and expressions related to conformity assessment, as well as information about
17、ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 134, Fertilizers and soil conditioners.iv ISO 2016 All rights reservedBS ISO 18645:2016INTERNATIONAL STANDARD
18、 ISO 18645:2016(E)Fertilizers and soil conditioners Water soluble fertilizer General requirements1 ScopeThis International Standard specifies the requirements for testing methods, sampling and preparation of test sample, marking and labelling, as well as package, transport, and storage of water solu
19、ble fertilizers.This International Standard is applicable to water soluble fertilizers which are completely soluble in water and are suitable for fertigation and sprinkling irrigation, as well as for foliar application (foliar feeding).2 Normative referencesThe following documents, in whole or in pa
20、rt, are normatively referenced in this 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 3696, Water for analytical laboratory use Spec
21、ification and test methodsISO 5315, Fertilizers Determination of total nitrogen content Titrimetric method after distillationISO 6353-1:1982, Reagents for chemical analysis Part 1: General test methodsISO 6598, Fertilizers Determination of phosphorus content Quinoline phosphomolybdate gravimetric me
22、thodISO 7409, Fertilizers Marking Presentation and declarationsISO 7410, Fertilizers and soil conditioners Final samples Practical arrangementsISO 7742:1988, Solid fertilizers Reduction of samplesISO 8633, Solid fertilizers Simple sampling method for small lotsISO 17318, Fertilizers and soil conditi
23、oners Determination of arsenic, cadmium, chromium, lead and mercury contentsISO 17319, Fertilizers and soil conditioners Determination of water-soluble potassium content Potassium tetraphenylborate gravimetric methodISO 18643, Fertilizers and soil conditioners Determination of biuret content of urea
24、-based fertilizers HPLC methodEN 16195, Fertilizers Determination of chlorides in the absence of organic materialCEN/TS 16196, Fertilizers Manganimetric determination of extracted calcium following precipitation in the form of oxalateEN 16198, Fertilizers Determination of magnesium by complexometryE
25、N 13366, Fertilizers Treatment with a cation exchange resin for the determination of the chelated micro-nutrient content and of the chelated fraction of micro-nutrientsEN 13368-1, Fertilizers Determination of chelating agents in fertilizers by chromatography Part 1: Determination of EDTA, HEEDTA and
26、 DTPA by ion chromatography ISO 2016 All rights reserved 1BS ISO 18645:2016ISO 18645:2016(E)EN 13368-2, Fertilizers Determination of chelating agents in fertilizers by chromatography Part 2: Determination of Fe chelated by o,o-EDDHA and o,o-EDDHMA by ion pair chromatographyEN 15451, Fertilizers Dete
27、rmination of chelating agents . Determination of iron chelated by EDDHSA by ion pair chromatographyEN 15452, Fertilizers Determination of chelating agents Determination of iron chelated by o,p-EDDHA by reversed phase HPLCEN 15749, Fertilizers Determination of sulfates content using three different m
28、ethodsEN 15950, Fertilizers Determination of N-(1,2-dicarboxyethyl)-D,L-aspartic acid (Iminodisuccinic acid, IDHA) using high-performance liquid chromatography (HPLC)EN 15961, Fertilizers Extraction of water-soluble calcium, magnesium, sodium and sulfur in the form of sulfatesEN 15962, Fertilizers D
29、etermination of the complexed micro-nutrient content and of the complexed fraction of micro-nutrientsEN 16109, Fertilizers Determination Of complexed micro-nutrient ions in fertilizers Identification of lignosulfonatesEN 16847, Fertilizers Determination of complexing agents in fertilizers Identifica
30、tion of heptagluconic acid by chromatographyEC Regulation No. 2003/20033 Requirement3.1 Appearance: the product (including single fertilizers, complexed micronutrients, and/or products obtained chemically) is a mixture of powders, prills, and/or granules free of foreign matter.3.2 Water soluble fert
31、ilizer products shall be tested to demonstrate the conformance with the requirements specified in Table 1, when applicable, and the values declared on containers.2 ISO 2016 All rights reservedBS ISO 18645:2016ISO 18645:2016(E)Table 1 Requirements of water soluble fertilizerItems RequirementsMass fra
32、ction of total primary nutrient (N + P2O5+ K2O)a, % 20Mass fraction of secondary nutrients (represented in elementary substance or oxides)b, %Marked valueMass fraction of micronutrients (represented in elementary substance)b, % Marked valueChelated fraction of micro-nutrientsc, % Marked valueMass fr
33、action of water insoluble matter, % 0,5pH value measured at 10 g/100 mL water 2,09,0Mass fraction of biuretd, % 1,2Mass fraction of chloride ione, %Products not labeled with “contains chloride” 2Products labeled with “contains chloride” 2aIf the product contains primary nutrients (N, P2O5, K2O), the
34、 product should contain at least one of the primary nutrients. For binary or ternary fertilizers, the declared primary nutrients of N should not be less than 3 %, the declared primary nutrients of P2O5and K2O should not be less than 5 %. For straight fertilizer, the mass fraction of single primary n
35、utrient should refer to in EC Regulation No. 2003/2003.bFor detailed regulations, refer to EC Regulation No .2003/2003.cThis item should be only tested when the chelated form of micro-nutrients are declared.dThis item should be tested wherever the existence of urea nitrogen is listed on the containe
36、rs; otherwise, it should be exempted.eFor the limitation of mass fraction of chloride and mass fraction of total primary nutrient, applicable local/regional legislations/laws/rules need to be followed.NOTE 1 Regarding the biuret content, the related requirements specified by the countries or regions
37、 need to be followed.NOTE 2 Regarding the content of As, Cd, Pb, Cr and Hg, the related requirements specified by the countries or regions shall be followed.4 Test method4.1 Visual inspection for foreign matterVisually inspect the product for the presence of contaminants and foreign matter.4.2 Deter
38、mination of nitrogen, phosphorus and potassium contentsDetermine the nitrogen content in accordance with ISO 5315.Determine the phosphorus content in accordance with ISO 6598.Determine the potassium content in accordance with ISO 17319.4.3 Determination of calcium, magnesium and sulphur contentsPrep
39、are the test solution in accordance with EN 15961.Determine the calcium content in accordance with CEN/TS 16196.Determine the magnesium content in accordance with EN 16198.Determine the sulphur content in accordance with EN 15749. ISO 2016 All rights reserved 3BS ISO 18645:2016ISO 18645:2016(E)4.4 D
40、etermination of molybdenum, boron and manganese, zinc, copper and iron contentsDetermine the molybdenum, boron and manganese, zinc, copper, and iron contents in accordance with EC Regulation No. 2003/2003, Annex IV, methods 9 and 10.4.5 Determination of the chelated fraction of micro-nutrientsDeterm
41、ine the chelated fraction of micro-nutrients in accordance with the following: EN 13366, EN 13368-1, EN 13368-2, EN 15451, EN 15452, EN 15950, EN 15962, EN 16109, EN 16847.4.6 Determination of the mass fraction of water insoluble matter4.6.1 PrincipleDissolve/dilute the test sample in water, and det
42、ermine the residual content that is insoluble in the water.4.6.2 Reagents and materialsUse only water conforming to grade 3 of ISO 3696.4.6.3 Apparatus4.6.3.1 Common laboratory apparatus.4.6.3.2 Glass crucible filter, No. 1, with volume of 30 ml.4.6.3.3 Reduced-pressure suction filtration device.4.6
43、.3.4 Drying oven, with temperature controlled at (110 2) C.4.6.4 Ambient temperature controlled at (20 10) C4.6.5 Test procedureWeigh 25 g test sample (accurately to 0,001 0 g) into a beaker, add 250 ml water and stir thoroughly for 3 min, standing in ambient temperature for (15 3) mins.Filter the s
44、olution with the glass crucible filter, which has already been dried to a constant weight in a drying oven at (110 2) C (dry until the weight of the two measurements is 0,3 mg). Transfer the residual content into the filter with a minimum amount of water.Put the glass crucible filter with all the re
45、sidual content into a drying oven at (110 2) C, keep it at 110 C for 1 h, and then transfer the glass crucible filter into a desiccator, wait until it cools down to the room temperature and weigh it.For the parallel blank test, follow the same procedure, except adding the test portion.The glass cruc
46、ible filter should be washed thoroughly after filtering, recommended washing process including soaking with potassium dichromate-sulphuric acid lotion overnight, then carefully flush with fresh water, reserved after suction filtering.4 ISO 2016 All rights reservedBS ISO 18645:2016ISO 18645:2016(E)4.
47、6.6 Calculation of the test resultThe mass fraction of water insoluble material, w, represented in mass fraction (%), shall be calculated by Formula (1):wmmm=11000(1)wherem1is the mass of water insoluble material, with the unit of gram (g);m0is the mass of water insoluble material in the blank test,
48、 with the unit of gram (g);m is the mass of the test portion, with the unit of gram (g).Take the arithmetic mean of duplicate tests as the final result; the final result should be rounded to two decimal places.4.6.7 ToleranceThe absolute difference value of two parallel tests should be 0,30 %, when
49、the mass fraction of water insoluble material is 2,0 %.The absolute difference value of two parallel tests should be 0,40 %, when the mass fraction of water insoluble material is 2,0 %.4.7 Determination of the pH valueDetermine the pH value in accordance with ISO 6353-1:1982, 5.31.1.4.8 Determination of arsenic, cadmium, lead, chromium and mercury contentsDetermine the arsenic, cadmium, lead, chromium, and mercury contents in accordance
