The radiation of metal atoms of Li (λ=670 nm), Na (λ=588−589 nm) and Ca (λ=657.2 nm, triplet) in plasma of the atmospheric pressure glow discharge with salt solutions as cathode has been studied. It was shown that in the circulating solution system the intensity of metal atoms radiation increases during burning discharge. The intensity value tends to constant limit value. The characteristic times of achieving of asymptotic intensity value are 22, 5.5 and 9.5 minutes for lithium, sodium and calcium respectively. These variations correlates with increasing velocity of non-equilibrium flow of solution components into plasma zone that observed early. It was found that the transition from alkali solution to acid solution is accompanied by increase of metal atom radiation intensity.