Made colloidal gold by accident.

[Shellmichelleo]

After using nitric acid boils to remove copper and other metals I started rinsing in distilled water alternating rinsing in hydrochloric acid. During these rinses the water started turning purple. Now I have a jug of purple water. The purple sticks to the sides and bottom of any vessel you put it in. I think it’s colloidal gold any ideas on how to fix this

 

[Elemental]

https://goldrefiningforum.com/threads/how-should-i-process-colloidal-gold.12496/

https://goldrefiningforum.com/threa...-colloidal-structure-in-colloidal-gold.28209/

An old post, but perhaps worth reading.

Elemental

 

[Shellmichelleo]

https://goldrefiningforum.com/threads/how-should-i-process-colloidal-gold.12496/

https://goldrefiningforum.com/threa...-colloidal-structure-in-colloidal-gold.28209/

An old post, but perhaps worth reading.

Elemental

Thank you that helped enormously

 

[Yggdrasil]

After using nitric acid boils to remove copper and other metals I started rinsing in distilled water alternating rinsing in hydrochloric acid. During these rinses the water started turning purple. Now I have a jug of purple water. The purple sticks to the sides and bottom of any vessel you put it in. I think it’s colloidal gold any ideas on how to fix this

If you alternate between Nitric and HCl you NEED to roast between each round as you will not get rid of all Nitrates/Chlorides and you create a little AR each time.
This might be the cause of your colloids.

 

[100tific]

After using nitric acid boils to remove copper and other metals I started rinsing in distilled water alternating rinsing in hydrochloric acid. During these rinses the water started turning purple. Now I have a jug of purple water. The purple sticks to the sides and bottom of any vessel you put it in. I think it’s colloidal gold any ideas on how to fix this

I think it could be metastannic acid, in solution it gives a violet tone. Are you sure it's gold? Did you test it?

 

[haveagojoe]

you NEED to roast

Presumably the material just needs to be heated to above the boiling point of the nitric or hydrochloric acid (120.5C for 68% nitric and 108C for 20% hydrochloric)? So for example 10 minutes in a dry stainless pan on a hotplate should be adequate?

 

[Yggdrasil]

Presumably the material just needs to be heated to above the boiling point of the nitric or hydrochloric acid (120.5C for 68% nitric and 108C for 20% hydrochloric)? So for example 10 minutes in a dry stainless pan on a hotplate should be adequate?

The general rule is heat to a low red glow.
The reason is that you need to decompose the Nitrates or the Chlorides.

 

[Martijn]

After using nitric acid boils to remove copper and other metals I started rinsing in distilled water alternating rinsing in hydrochloric acid. During these rinses the water started turning purple. Now I have a jug of purple water. The purple sticks to the sides and bottom of any vessel you put it in. I think it’s colloidal gold any ideas on how to fix this

You can evaporate the purple solution down and add a bit of AR to dissolve the colloid.
To clean the wallls of beakers: add a bit of AR to the empty beaker and tilt it to one side until the purple is dissolved. Repeat with all sides.