Premium
Aluminium in Finn chambers® reacts with cobalt and nickel salts in patch test materials
Author(s) -
Fischer Torkel,
Maibach Howard
Publication year - 1985
Publication title -
contact dermatitis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 96
eISSN - 1600-0536
pISSN - 0105-1873
DOI - 10.1111/j.1600-0536.1985.tb01106.x
Subject(s) - nickel , cobalt , aluminium , metal , chemistry , inorganic chemistry , materials science , metallurgy , nuclear chemistry
Aluminium has n greater affinity for electrons than cobalt and nickel. Therefore, cobalt and nickel ions would be expected to exchange with metallic aluminium in Finn chambers®. This theory has been proven to be valid, as shown in 2 series or experiment: first, cobalt and nickel sail solutions (0.25 M) etch a metallic aluminium surface; secondly, aluminium Finn chambers kept in 10 ‐3 M nickel salt solutions significantly reduce the concentration of dissolved nickel. Dichromate solutions do not etch an aluminium metal surface significantly. Petrolatum, which is routinely used as vehicle in standard patch tests, probably protects the aluminium of Finn chambers® from the interaction of cobalt and nickel sails. The interaction may have significance in tests with solutions.