[Study of humidifying oxygen with 0.1 copper sulfate solution].

The 0.1/dL copper sulfate solution may be used to replace distilled water for humidifying oxygen. It can reduce the carrier rate and prolong the using time. There is little copper-ion in the oxygen while the 0.5/dL copper sulfate solution were used continuously for 9 days. The oxygen humidified by copper sulfate solution has no peculiar smell. The solution is cheap, easy to make, and has broad bacteriostatic spectrum.