BS ISO 22764:2020 pdf free.Jewellery and precious metals一Fineness of solders used with precious metal jewellery alloys.
BS ISO 22764 1 Scope This document specifies the precious metal content in solders suitable for use in the production of jewellery made of precious metal alloys. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 11210, Jewellery一Determination of platinum in platinum jewellery alloys一Gravimetric method after precipitation of diammonium hexachloroplatinate ISO 11426, /ewellery – – Determination of gold in gold jewellery alloys一Cupellation method (fire assay) ISO 11422 Jewellery一Determination of silver in silver jewellery aloys一Volumetric (potentiometric) method using potassium bromide ISO 11490， Jewellery 一Determination of palladium in palladium jewellery alloys 一Gravimetric determination with dimethylglyoxime ISO 11494, Jewellery and precious metals . – Determination of platinum in platinum alloys 一ICP-OES method using an internal standard element ISO 11495. Jewellery and precious metals一Determination of palladium in plladium aloys一ICP-OES method using an internal standard element ISo 13756, Jewellry一Determination of siver in siver jewellery alloys一Volumetric (potentiometric) method using sodium chloride or potassium chloride ISO 15093, Jewellery and precious metals – – Determination of high purity gold, platinum and palldium一 Diference method using ICP-OES ISO 15096 Jewellery and precious metals – Determination of high purity siver- Diference method using ICP-OES 3 Terms and definitions For the purposes of this document, the following terms and definitions apply.
IS0 and IEC maintain terminological databases for use in standardization at the fllowing addresses:一，ISO Online browsing platform: available at htp://www.iso.org/obp 一IEC Electropedia: available at htp://www.electropedia.org/ 3.1 fineness content of the named precious metal (3.2) in the lly in terms of parts per thousand by weight (%o) BS ISO 22764 pdf downlaod.