Mai A. Saleh

There are lots of ways:

• Gamma radiation
• High temperatures
• Ozone treatment
• UV radiation
• Witchcraft, incantation, spells

@Alan F Rawle thank you, but high temperature effect the compont and uv not enough as I will use it on stem cells

Mai A. Saleh

None of what you state above was in your question which reads 'What is the best method to sterilize hydroxyapatite nanoparticles?' and the supporting material was 'Powder insoluble'.

I answered your question - it's always helpful to provide as much information in your question to avoid going backwards and forwards. You are new to the platform so you are forgiven!