Yes, you can inquart, but it's not necessary if you do a nitric boil of the slimes, then dissolve them.
If they were mine, I'd do exactly this, nothing more, nothing less.
Incinerate slimes, paper and all.
Screen the remains, then boil in dilute nitric acid. You'll see why this is important the moment you introduce the nitric. You should end up with a blue solution, maybe even a slight green tint. That's what you should be eliminating before melting your recovered values.
Rinse no less than two times, allowing solids to settle before siphoning the solution. Test for silver before discarding. If the solution leans green, test for palladium.
Dissolve the solids with the chemical of choice, filter and precipitate. I would evaporate to eliminate excess nitric. You may choose to use a different system entirely, including the use of urea.
Do not overlook a good washing procedure after precipitation.
Filtration is very important. Your solution should be 100% absent of any solid matter before precipitating.
None of this is necessary if you're content to sell your gold as scrap. If you have hopes of selling it to an end consumer, it must be pure. It won't be when recovered from a cell.
Harold