The vapor pressures of lanthanum and praseodymium

Vacuum Fusion Determination of Oxygen and Nitrogen Lanthanum

“…The present report describes a procedure w'hereby a combination of the basic lead acetate test (S, 4) and the reaction of hydroxamic acid with ferric ion used for lactones and esters (1) served to identify galacturonic and glucuronic acids by paper chromatography.…”

“…Aqueous solutions of the uronic acids were applied to Whatman No. 1 filter paper sheets with micropipets and the sheets were then dried in air at room temperature. The papers were irrigated in the ascending direction (S) with a solvent of ethyl acetate, pyridine, water, and acetic acid in a ratio of 5:5:3:1 (5) and dried in air without heating until they w'ere free from acetic acid.…”

Vapor pressures of the rare earth metals

“…The symbol P represents the pressure in atmospheres, AH t is the heat of transition at temperature T°K and R is the universal gas constant. If equation 11 is integrated to give A Hm 108 F --2.303 RT * C ' (12) the result is the equation of a straight line, where the A H elope is equal to 5L-. If AH is required at some other 2.303 R temperature, for Instance 298°K, it must be corrected for the difference in the enthalpies of the condensed and vapor phases between T and 298°K.…”