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Bioaccessibility of nickel and cobalt in powders and massive forms of stainless steel, nickel- or cobalt-based alloys, and nickel and cobalt metals in artificial sweat
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Surface and Corrosion Science.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Surface and Corrosion Science.ORCID iD: 0000-0002-2123-2201
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Surface and Corrosion Science.ORCID iD: 0000-0002-6042-9752
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Surface and Corrosion Science.ORCID iD: 0000-0003-2206-0082
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2019 (English)In: Regulatory toxicology and pharmacology, ISSN 0273-2300, E-ISSN 1096-0295, Vol. 106, p. 15-26Article in journal (Refereed) Published
Abstract [en]

Nickel (Ni)and cobalt (Co)are the most common metal allergens upon skin contact at occupational settings and during consumer handling of metals and alloys. A standardized test (EN, 1811)exists to assess Ni release from articles of metals and alloys in massive forms intended for direct and prolonged skin contact, but no corresponding test exists for other materials such as powders or massive forms of alloys placed on the market or to determine the release of Co, for which only limited data is available. Differences in Ni and Co release from massive forms of a range of common stainless steels and some high-alloyed grades compared to Ni and Co metals were therefore assessed in artificial sweat for 1 week at 30 °C according to EN 1811. A comparable modified test procedure was elaborated and used for powders and some selected massive alloys. All alloys investigated released significantly less amount of Ni (100–5000-fold)and Co (200–400,000-fold)compared with Ni and Co metal, respectively. Almost all alloys showed a lower bioaccessible concentration (0.007–6.8 wt% Ni and 0.00003–0.6 wt% Co)when compared to corresponding bulk alloy contents (0.1–53 wt% Ni, 0.02–65 wt% Co). Observed differences are, among other factors, related to differences in bulk composition and to surface oxide characteristics. For the powders, less Ni and Co were released per surface area, but more per mass, compared to the corresponding massive forms. © 2019 The Authors

Place, publisher, year, edition, pages
Academic Press Inc. , 2019. Vol. 106, p. 15-26
Keywords [en]
Artificial sweat, Classification, Corrosion, EN 1811, Metal release, Particles, Regulation, Skin sensitizer, alloy, cobalt, dermatological agent, nickel, oxide, stainless steel, unclassified drug, Article, calibration, chemical composition, concentration (parameter), particle size, pH, powder, priority journal, surface area, surface property
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-252512DOI: 10.1016/j.yrtph.2019.04.017Scopus ID: 2-s2.0-85064756776OAI: oai:DiVA.org:kth-252512DiVA, id: diva2:1336850
Note

QC 20190710

Available from: 2019-07-10 Created: 2019-07-10 Last updated: 2019-07-10Bibliographically approved

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Wang, XuyingHerting, GunillaWei, ZhengOdnevall Wallinder, IngerHedberg, Yolanda

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