ISO/TS TECHNICAL SPECIFICATION 14256-1 First edition 2003-03-15 Soil quality Determination of nitrate, nitrite and ammonium in field-moist soils by extraction with potassium chloride solution - Part 1: Manual method Qualité du sol- Dosage des nitrates, des nitrites et de I'ammonium danslessolsbrutsparextrationaumoyend'unesolutiondechlorure depotassium- Partie 1: Methode manuelle Reference number ISO/TS 14256-1:2003(E) ISO @ISO2003 y IHS under itted without licensefrom IHS Not for Resale ISO/TS 14256-1:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademarkof Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ?ISO2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @Iso2003-All rightsreserved ted without license from IHS Not for Resale ISO/TS 14256-1:2003(E) Contents Page Foreword .iv 1 Scope. 2 Normative references 3 Principle. 4 Handling of the soil samples . 5 Laboratory sample 2 6 Procedure.. 6.1 Extraction... 6.2 Determination of the sum of nitrate and nitrite. 6.3 6.4 Determination of ammonium ions. 11 7 Test report. .13 Bibliography .14 Copyrightntemationalrganzaaardizatightsreseved ili dby IHS under e with I: dwithout license from IHS Not for Resale ISO/TS 14256-1:2003(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In other circumstances, particularly when there is an urgent market requirement for such documents, a technical committee may decide to publish other types of normative document: an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in of the parent committee casting a vote; committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Standard, or withdrawn. If the ISsO/PAs or ISO/Ts is International Standard or be withdrawn. 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 held responsible for identifying any or all such patent rights. ISO/TS 14256-1 w