SIST EN ISO 11490:2023 PDF

Name: SIST EN ISO 11490:2023 — Jewellery and precious metals - Determination of palladium - Gravimetry using dimethylglyoxime (ISO 11490:2023)
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Jewellery and precious metals - Determination of palladium - Gravimetry using dimethylglyoxime (ISO 11490:2023)

Название (английский):

SIST EN ISO 11490:2023

Jewellery and precious metals - Determination of palladium - Gravimetry using dimethylglyoxime (ISO 11490:2023)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 6 апреля 2023 г.
Издание:: ISO 11490:2023
ICS:: 39.060

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Описание (английский):

This document specifies a gravimetric method for the determination of palladium on a material considered homogeneous. The palladium content of the sample lies preferably between 50 and 999 parts per thousand (‰) by mass. Fineness above 999 ‰ can be determined using a spectroscopy method by difference (e.g. ISO 15093). This method is also intended to be used as one of the recommended methods for the determination of fineness in jewellery alloys covered by ISO 9202.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 11490:2023 - "Jewellery and precious metals - Determination of palladium - Gravimetry using dimethylglyoxime" - specifies a standardized gravimetric procedure to determine palladium content in homogeneous precious-metal alloys. The method is optimized for palladium contents preferably between 50 and 999 parts per thousand (‰) by mass. For fineness above 999 ‰, spectroscopy by difference (e.g. ISO 15093) is recommended. This edition (2023) supersedes EN ISO 11490:2016 and extends applicability beyond jewellery to a wider range of precious-metal alloys.

Key topics and technical requirements

Analytical principle: dissolve sample in aqua regia, precipitate palladium as a dimethylglyoxime complex, ignite to produce a palladium “sponge”, and weigh gravimetrically.

Silver handling: silver, if present, is separated as silver chloride (AgCl) before palladium precipitation (specific procedure provided).

Correction for co‑precipitates: co-precipitated alloying elements are tested after re-dissolving the palladium sponge (for example by ICP‑OES) and corrections applied to the palladium mass.

Reagents and apparatus: uses aqua regia, HCl, HNO3, dimethylglyoxime (aqueous and ethanol-saturated), reducing/inert gases, porcelain crucibles, muffle furnace (≥900 °C), ashless filter paper, and an analytical balance (0.01 mg readability).

Procedure highlights: preliminary composition check (e.g., XRF), sample flattening, controlled dissolution and evaporation, staged addition of saturated dimethylglyoxime solutions, filtration/washing, ignition and weighing.

Safety and quality: cautions for hazardous reagents (aqua regia, strong acids) and requirement to use analytical-grade reagents and distilled water. Sampling should follow ISO 11596.

Method updates: removal of hydrofluoric and sulfuric acid from the method and harmonization with ISO 11210.

Applications and users

This standard is intended for:

Assay offices and certifying bodies for jewellery fineness.

Analytical laboratories testing palladium content in alloys and jewellery.

Manufacturers and quality-control teams in jewellery and precious‑metal production.

Regulatory and compliance labs requiring traceable, standardized palladium determination. Practical uses include fineness certification (in conjunction with ISO 9202), quality control of palladium‑bearing alloys, and forensic or valuation analyses.

Related standards

ISO 9202 - determination of fineness in jewellery alloys (method context).

ISO 15093 - spectroscopy methods by difference for very high fineness (>999 ‰).

ISO 11210 - harmonized analytical methods referenced in updates.

ISO 11596 - sampling procedures for precious metals.

Keywords: EN ISO 11490:2023, palladium determination, gravimetry, dimethylglyoxime, jewellery, precious metals, fineness, ICP‑OES, aqua regia.

SIST EN ISO 11490:2023 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 11490:2023

Jewellery and precious metals — Determination of palladium — Gravimetry using dimethylglyoxime

ISO 15093:2008

Jewellery — Determination of precious metals in 999 0/00 gold, platinum and palladium jewellery alloys — Diff…

SIST EN ISO 11596:2026

Jewellery and precious metals - Sampling of precious metals and precious metal alloys (ISO 11596:2021)

SIST EN ISO 11210:2023

Jewellery and precious metals - Determination of platinum - Gravimetry using ammonium chloride (ISO 11210:202…

ISO 9202:1991

Jewellery — Fineness of precious metal alloys