title: [The investigation of nickel dissolution from nitinol under different extraction conditions in biological tests].
abstract: The dissolution of nickel from nitinol alloy under different extraction conditions was investigated when biological tests of nitinol medical devices were carried out. It discussed the equivalence of these extraction conditions and found the best extraction conditions. In the experiment, two brands of nitinol were chosen and extracted under different extraction conditions according to GB/T 16886-12. Plasma emission spectrometer was used to analyse the concentration of nickel in extract liquid. The results show that there is no equivalence among these extraction conditions for nitinol materials. And it is suggested that (37 +/- 1) degree C, (72 +/- 2) h could be used as normal extraction condition and (70 +/- 2) degrees C, (24 +/- 2) h as accelerated extraction condition.
authors.affiliation: Beijing Institute of Medical Device Testing, Beijing, 101111. wenxiantao@hotmail.com
authors.forename: Xiantao
authors.initials: X
authors.lastname: Wen
authors.forename: Xueying
authors.initials: X
authors.lastname: He
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.forename: Juli
authors.initials: J
authors.lastname: Tang
authors.forename: Yongfu
authors.initials: Y
authors.lastname: Huang
mesh_terms: D000497:Alloys / Q000737:chemistry*; D001672:Biocompatible Materials; D008422:Materials Testing; D009532:Nickel / Q000737:chemistry*; D013696:Temperature; D014025:Titanium
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; C013616:nitinol; D009532:Nickel; D014025:Titanium