Palladium for Barcodes

Hi,
I am trying to buy new Palladium to be used as barcodes. However, I was told that there are 2 versions (Nitrate vs Metal). Which should I buy?
Do I just resuspend the powder and use it directly as barcodes?
Many Thanks in Advance
CyTOF Noob
I am trying to buy new Palladium to be used as barcodes. However, I was told that there are 2 versions (Nitrate vs Metal). Which should I buy?
Do I just resuspend the powder and use it directly as barcodes?
Many Thanks in Advance
CyTOF Noob