ISO 123 pdf download

ISO 123 pdf download.Rubber latex — Sampling 1 Scope This International Standard specifies procedures for sampling natural rubber latex concentrate and for sampling syn- thetic rubber latices and artificial latices. It is also suitable for sampling rubber latex contained in drums, tank cars or tanks. The procedures may also be used for sampling plastics dispersions. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publica- tions do not apply. However, parties to agreements based on this International Standard are encouraged to investi- gate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain reg- isters of currently valid International Standards. ISO 1 24:1 997, Latex, rubber — Determination of total solids content . ISO 706:1 985, Rubber latex — Determination of coagulum content (sieve residue) . ISO 331 0-1 :2000, Test sieves — Technical requirements and testing — Part 1 : Test sieves of metal wire cloth . ISO 1 5528:2000, Paints, varnishes and raw materials for paints and varnishes — Sampling . 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 lot a definite quantity of latex processed or produced under conditions which are presumed uniform NOTE A lot may be in one or more containers or vessels. For example, it may consist of several drums of latex. 3.2 sample a quantity of latex that has been drawn from a lot 3.3 laboratory sample a quantity of latex intended for laboratory inspection and testing and that is representative of the lot 3.4 test sample a quantity of latex suitable for testing, obtained by straining the laboratory sample NOTE The laboratory sample, not the test sample, is used for the determination of coagulum content (see 6.5.5). 3.5 test portion a quantity of latex taken from the test sample (3.4) or laboratory sample (3.3), for the purpose of a single specific test, for example the amount actually weighed out from the test sample for a single determination of total solids content 3.6 coagulum content/sieve residue coarse foreign matter and flocculated rubber retained under the conditions of the test (ISO 706) on a filter with aver-...