2466 NTERNATIONAL STANDARD TSO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOIHAS OPTAHH3ALING TIO CTAHIAPTH3ALIHH·ORGANISATION INTERNATIONALE DE NORMALISATION Potassium hydroxide for industrial use -- Sampling -- Test sample - Preparation of the main solution for carrying out certain determinations First edition-1973-04-01 MAR291973 UDC 661.312.1 : 543.05 Ref.No. ISO 2466-1973 (E) Descriptors : potassium hydroxides, sampling, test specimens, solutions, preparation. Price based on 2 pages FOREWORD Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (IsO Member Bodies). The work of developing Internationai Standards is carried out through Iso Technical Committees. Every Member Body interested in a subject for which a Technicai Committee has been set governmental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO2466 wasdrawnupbyTechnicalCommittee ISO/TC 47, Chemistry, and circulated to the Member Bodies in August 1971. It has been approved by the Member Bodies of the following countries : Austria India Romania Belgium Ireland South Africa, Rep. of Chile Israel Spain Czechoslovakia Italy Sweden Egypt, Arab Rep. of Netherlands Switzerland France NewZealand Thailand Germany Poland United Kingdom Hungary Portugal U.S.S.R. No Member Body expressed disapproval of the document. This Internationai Standard cancels and replaces IS0 Recommendations R 988-1969, Potassium hydroxide for industrial use - Preparation and storage of test sample, and R 989-1969,Potassium hydroxide for industrial use -Preparation of sample solution. InternationalOrganizationforStandardization,1973 Printed in Switzerland ISO 2466-1973 (E) INTERNATIONALSTANDARD Potassium hydroxide for industrial use -- Sampling -- Test sample -- Preparation of the main solution for carrying out certain determinations 1 SCOPEANDFIELDOFAPPLICATION Crushing or grinding in amortar,if necessary.shall be carried out in the minimum time, in an atmosphere as dry This International Standard provides certain indications as possible, relating to the sampling of quantities of potassium hydroxide, indicates the conditions under which the test It is recommended that these operations should be carried sample should be prepared, and describes a method for the out in a "glove box" fitted with gauntlets, from which preparation of the main solution to be used for carrying out moisture and carbon dioxide have been removed by the certain determinations. introduction, at least 1 h before the sample is treated, of flat dishes containing phosphorus pentoxide and potassium hydroxide peilets. 2 LABORATORYSAMPLE 2.1 The particular properties of potassium hydroxide 3.2 Take about 300 g of the laboratory sample and, in the which make special precautions essential should be case of a solid product,grind it, if necessary,to ensure that stressed : hygroscopic characteristics, ability to absorb the largest dimension of the pieces does not exceed about 6 mm. Place the sample in an airtight container, composed carbon dioxide, corrosive action on containers. These properties make it necessary that : of a material that does not contaminate the product with the elements to be determined and of such a capacity that samples shall be taken rapidly in a dry atmosphere; it is aimost completely filled. the laboratory sample shall be stored in an airtight The containers shall bear a label, with protective coating. bottle,protected from contactwiththe atmosphere; indicating : the bottle shall be made of a made of a material that the origin and identification of the test sample; does not contaminate the sample with the elements to the date on which it was placed in the container. be determined (for example, a silica-free mate