I have a 720 ICP-OES. Last week I started having issues getting a 100% wavelength calibration. I assumed the system to be "dirty". At that time I changed all the tubing and installed a new torch, nebulizer and spray chamber. The torch alignment is coming back as normal but I am still only able to get 80.56% on my wavelength calibration. Is there something else that could be the problem or am I correct to assume it occurs only from sample introduction? I am baffled as everything I have tried has failed.