We unfortunately analyzed a client sample with 100000ppb Lithium and we can't seem to rinse it out of 7850. Any suggestions? We have cleaned the cones, lens, all tubing, new torch. Our matrix is 2%nitric. Is there anything else we can do? It is slowly washing out however its been several days and we would like to move this along.
Hi,
Set Up a Rinse Solution with 5% HNO3 and 5% HCl and rinse the System in Standby for (just turn on the peri pump)
If you use the T-Piece for the internal standard, do not forget to clean it as well.
Turn on the Plasma and have a look in signal monitor about the Li Counts in the 2% HNO3 rinse, if they are still high, introduce the 5% HNO3/HCl solution.
The counts should decrease faster but have in mind that excessive use of HCl will damage your cones, so i recommend doing this only several minutes.
if it looks like this, it is too much Lithium ;-)
