I am completing some sample preparations by SPE (for chromatography analysis) and I want to investigate breakthrough metal concentration for the eluted sample by analysis on our ICP-OES. The SPE elute solution is 5% ammonia in 20% water and 75% methanol. This solution will be diluted in water/nitric acid (x10) before analysis on the ICP. Is it OK is my ICP sample contains approximately 7% methanol and 0.5% ammonia? Typically our samples are pure aqueous/nitric with no methanol.