The reaction is marked even when traces of these constituents are present in a gas mixture. Palladium separates out as a black cast or as particles suspended throughout the liquid. The authors found that 0.1 per cent of ethylene in a mixture of ethylene... Bulletin - Page 811926Full view
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United States. Bureau of Mines - Mines and mineral resources - 1912
...the liquid. The authors found that 0.1 per cent of ethylene in a mixture of ethylene and air could be detected by the appearance of precipitated palladium...the palladium chloride solution. Carbon monoxide, when present in a gas mixture in the same proportion and under the same conditions, produces a precipitation...