Direct Determination of Oxygen in Organic Compounds by Hydrogenation

Determination of Oxygen in Organic Compounds.

“…Similarly, freshly ignited calcium oxide has been recommended (94). Russell and Marks (74) report that 33 to 85 per cent of the nitrogen in representative organic compounds is converted to ammonia when platinized quartz the thoria-nickel catalysts are used, whereas no ammonia is formed when the nickel chromite catalyst is used (25).…”

“…ter Meulen (55) advised the use of iron-free nickel oxide in preparing the catalyst, since iron slows up the rate of reduction. (c) Determination of water formed Various substances have been proposed and used as absorption agents for the water produced in the reaction, including calcium chloride (29, 48, 50, 73), calcium oxide (95), calcium sulfate (2,25,34,37,44), lithium hydroxide (95), magnesium perchlorate (37), and sodium hydroxide (29, 74). These, of course, involve the gravimetric determination of the water formed.…”

Review of Organic Microchemistry

“…Oxygen [nickel chromite (114), nickel (188), nickel thoria (53,157,350), platinum in silica gel (215)] gives water.…”

Direct microdetermination of oxygen in organic substances by hydrogenation

“…A RECENT communication (1) the writer presented a general method for the determination of acetyl, based upon the principle of an alkaline, alcoholic hydrolysis of an acetyl compound, followed by acidification and distillation of the liberated acetic acid. For the distillation the alkali was neutralized with enough strong magnesium sulfate solution containing sulfuric acid, so that the reaction mixture had á volume of 20 cc.…”