STN EN ISO 11426
| Name: | STN EN ISO 11426 |
| Validity: | Valid |
| Number of pages: | 20 |
| Language: |
EN
|
| Paper: | 14,10€ |
| Electronic version |
a) Only read (without ability to print and copy)
12,69€ b) Without ability to print, with ability to copy (printscreen) 14,10€ c) With ability to print and copy (printscreen) 18,33€ |
| Slovak title | Klenoty a vzácne kovy. Stanovenie zlata. Kupelačná metóda (skúška tavením) (ISO 11426: 2021) |
| English title | Jewellery and precious metals - Determination of gold - Cupellation method (fire assay) (ISO 11426:2021) |
| Release Date: | 01. 07. 2021 |
| Date of withdrawal: | |
| ICS: | 39.060 |
| Sorting character/National clasification code | 42 0651 |
| Level of incorporation: | idt ISO 11426:2021, idt EN ISO 11426:2021 |
| Official Journal | 06/21 |
| Amendments | |
| Replaced by: | |
| Repleces: | STN EN ISO 11426:2017-04 (42 0651) |
| Note in Official Journal: | |
| Subject of the standard: | This document specifies a cupellation method (fire assay) for the determination of gold on a material considered homogeneous. The gold content of the sample lies preferably between 100 and 999,5 parts per thousand (‰) by weight. Fineness above 999,5 ‰ can be determined using a spectroscopy method by difference (e.g. ISO 15093). The procedure is applicable to most types of gold samples. Some modifications are indicated for specific cases (presence of large amount of base metals, platinum or palladium, silver). It is not compatible with the presence above trace levels of iridium, rhodium and ruthenium (more than 0,25 ‰ for the sum of all three elements). This method is also intended to be used as the recommended method for the determination of fineness in jewellery alloys covered by ISO 9202. |
| Preview: | Náhľad normy (PDF) |