Cobalt release from inexpensive jewellery : has the use of cobalt replaced nickel following regulatory intervention?

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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Objectives: The aim was to study 354 consumer items using the cobalt spot test. Cobalt release was assessed to obtain a risk estimate of cobalt allergy and dermatitis in consumers who would wear the jewellery. Methods: The cobalt spot test was used to assess cobalt release from all items. Microstructural characterization was made using scanning electron microscope (SEM) and energy-dispersive spectroscopy (EDS). Results: Cobalt release was found in 4 (1.1%) of 354 items. All these had a dark appearance. SEM/EDS was performed on the four dark appearing items which showed tin-cobalt plating on these. Conclusions: This study showed that only a minority of inexpensive jewellery purchased in Denmark released cobalt when analysed with the cobalt spot test. As fashion trends fluctuate and we found cobalt release from dark appearing jewellery, cobalt release from consumer items should be monitored in the future. Industries may not be fully aware of the potential cobalt allergy problem.
Original languageEnglish
JournalContact Dermatitis
Publication date2010
Volume63
Pages70-76
ISSN0105-1873
DOIs
StatePublished
CitationsWeb of Science® Times Cited: No match on DOI

Keywords

  • screening, spot test, jewellery, cobalt allergy, cobalt dermatitis, cobalt ions
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