I realize this is old and you probably learned by now but once you’ve ashed your IC chips and you put them all into a container and done your gravity separation. A helpful hint would be to just put 30% nitric and 70% water on it let that reaction take place filter everything and then put what’s in the filter into your aqua Regis solution, much cleaner, much faster and way more efficient. And also, you are using way more nitric than you need to in your AR solution. It was almost a dark brown should be a very very light yellow. Don’t use that 2/3, 1/3 ratio for your AR solution. It’s terrible.
