Hi, I got some problems with quartz cuvette, which stained by some gold nanoparticles, and shows blue-black color, compare to new one.

I need to clean up the particle, but is it OK to use aqua regia?

I heard somewhere that do not use strong acid or base to cuvette, because the acid can promote the proton to cuvette and base can make melt desolve quartz or glass.

But I think there are no option to remove them.

So, please give me some answer of the best way to remove remaining gold particles from cuvette.

Thank you.