The investigation of nickel dissolution from nitinol under different extraction conditions in biological tests.
- Author:
Xiantao WEN
1
;
Xueying HE
;
Jian LI
;
Juli TANG
;
Yongfu HUANG
Author Information
1. Beijing Institute of Medical Device Testing, Beijing, 101111. wenxiantao@hotmail.com
- Publication Type:Journal Article
- MeSH:
Alloys;
chemistry;
Biocompatible Materials;
Materials Testing;
Nickel;
chemistry;
Temperature;
Titanium
- From:
Chinese Journal of Medical Instrumentation
2013;37(2):129-131
- CountryChina
- Language:Chinese
-
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.
