we are using Agilent 8900. How to switch plasma from hot plasma to cold plasma so that we can test Ca, Na, K, Fe, Zn, Ni, Cu ... in an accurate way? Do I need a S-lens? Thank you a lot.

we are using Agilent 8900. How to switch plasma from hot plasma to cold plasma so that we can test Ca, Na, K, Fe, Zn, Ni, Cu ... in an accurate way? Do I need a S-lens? Thank you a lot.

I tried to lower the RP power, and increase sample depth, but the sensitivity was too low, and the signal of those metals was too weak, almost 0 cps.