title: [Analysis the cupric ion release characteristics of different copper raw materials in intrauterine device in vitro using ICP method].
abstract: OBJECTIVE
  To study the Cupric ion release characteristics of different copper raw materials in intrauterine device in vitro by ICP. Reveal the relationship between purity and shape of Cu-IUD copper and copper ion release.
  
  
  METHODS
  According to a certain proportion, the copper raw materials were 100 times diluted into the simulated uterine solution at 37 +/- 0.5 degrees C. Replaced medium at certain time points and collected soaking liquid. Using ICP analyzed the concentration of copper ion released.
  
  
  RESULTS
  The largest daily release of copper ions was in the first 7 days. There was no statistically significant difference between the copper ion release amount of 99.99% and 99.95% purity copper wire (P > 0.05). The release of copper ion of the copper wire was far greater than that of the copper pipe in early stage (P < 0.01). The release amount decreased and stabilized at 56 day.
  
  
  CONCLUSIONS
  Release characteristics of copper ion could effectively analysis by ICP. And in the same area, the release amount of copper ions of copper wire was greater than that of copper pipe.
authors.forename: Hua
authors.initials: H
authors.lastname: Lu
authors.forename: Tingting
authors.initials: T
authors.lastname: Ding
authors.forename: Tianping
authors.initials: T
authors.lastname: Yao
authors.forename: Jiao
authors.initials: J
authors.lastname: Sun
mesh_terms: D003300:Copper / Q000737:chemistry*; D007434:Intrauterine Devices; D007477:Ions / Q000737:chemistry
chemical_list: D007477:Ions; D003300:Copper