1 Scope
This Standard specifies a method for simulating the release of nickel from jewellery, in order to determine whether such items release nickel at a rate greater than 0.5 μg/(cm2•week).
This Standard is applicable to the determination of the release of nickel from jewellery, as well as the products intended to come into direct and prolonged contact with the skin (see 4.3.2 of GB 11887-2002).
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate 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.
GB 11887-2002 Jewellery — Fineness of Precious Metal Alloys and Designation (ISO 9202:1991, NEQ)
3 Principle
The item to be tested for nickel release is placed in an artificial sweat test solution for one week. The concentration of dissolved nickel in the solution is determined by atomic absorption spectrometry, inductively-coupled plasma spectrometry or other appropriate analytical method. The nickel release is expressed in micrograms per square centimetre per week [μg/(cm2•week)].
4 Reagents
