You asked what Pt was and I replied Platinum.
I said nothing and there was nothing in my post indicating anything about a test kit.
What I can see is that it seem you have little understanding of what/how these test kits are used for and their limitations.
Thes can be used for clean metal.
You take a piece of jewlry and scratch it on a test stone.
Then you scratch one assumed lower and highe next to that and drip test acid on it this will indicate if your test subjectvis lower or higher in purity.
It can not be used for ores.
