Here's the situation ... I am not allowed (by the wife) to work with Nitric at home, so I am stuck using Sodium Nitrate to make poormans. I used this to dissolve about 22 grams of 8.5k gold in my fume hood, as one does, and had no problems doing so. Afterwards I discovered I had used too much NaNO3 and so I needed to denox. My solution was hot so I added sulfamic crystals and set my stir bar spinning.
After the sulfamic had dissolved I added a little more for good measure and eventually saturated the solution 😅 ... oops. At this point I needed to filter it to get the lead and excess sulfamic out anyway, so I did so. Afterwards I added some tap water ice to cool it down for precipitation...
Stannous test turned nice and black ... soooooo ... added SMB. Crazy foam but no precipitation. Thinking I was crazy I added more SMB but same result. I let it sit for several hours ... but nothing. Not even a dusting. Bear in mind I am expecting almost 9 grams of 24k, so to see nothing at all is unnerving.
Can anybody look at my process and let me know what I did wrong? Too much sulfamic? The tap water ice? For the life of me I don't think there is excess nitric in solution. Fresh stannous solution, too ... Is it possible I have pt group metals that I am confusing in the stannous test??? ðŸ˜
After the sulfamic had dissolved I added a little more for good measure and eventually saturated the solution 😅 ... oops. At this point I needed to filter it to get the lead and excess sulfamic out anyway, so I did so. Afterwards I added some tap water ice to cool it down for precipitation...
Stannous test turned nice and black ... soooooo ... added SMB. Crazy foam but no precipitation. Thinking I was crazy I added more SMB but same result. I let it sit for several hours ... but nothing. Not even a dusting. Bear in mind I am expecting almost 9 grams of 24k, so to see nothing at all is unnerving.
Can anybody look at my process and let me know what I did wrong? Too much sulfamic? The tap water ice? For the life of me I don't think there is excess nitric in solution. Fresh stannous solution, too ... Is it possible I have pt group metals that I am confusing in the stannous test??? ðŸ˜