The Temperature Dependence of the Isotope Effect for Electromigration of Lithium Ions in Molten Lithium Nitrate
ثبت نشده
چکیده
where t is the temperature in °C and the quoted error is the standard deviation. There is thus in this case no significant influence of the temperature upon the mass effect. Some previous investiga tions of molten LiN03 gave smaller values for the mass effect. The reasons for these apparent dis crepancies are discussed. A slight, but significant, anomalous enrichment of the light isotope is ob tained in the middle of the cell, as has been previously observed in experiments with KN03 . The mass effects have now been measured for all five alkali ions in the pure molten nitrates. For a corresponding temperature chosen 5% above the melting point none of the experimental values differ more than 14% from the relation
منابع مشابه
The Temperature Dependence of the Isotope Effect for Electromigration of Potassium Ions in Molten Potassium Nitrate
generally interpreted as an indication of "complex ions" (which is another way of saying that a simple model with only three ionic species is inadequate) . The small absolute value of r12 in the A g N 0 3 — K N 0 3 mixture makes the experimental uncertainty more important. Thus the positive value at 380 °C indicates that also the value at 340 °C should be (small and) positive (since increased t...
متن کاملThe Isotope Effect for Electromigration of Sodium Ions in Molten Sodium Nitrate
2 2 Na and the stable isotope 2 3 Na. The accuracy of that experiment was, however, low, because the specif ic activity measurement was based on the assumption that the sodium nitrate was pure, while a certain contamination due to thermal decomposition, corros ion of the packing material, etc. could hardly be avoided. The purpose of the present work is to re-determine the mass effect by using t...
متن کاملTHE CARRIER FACILITATED TRANSPORT OF THE LITHIUM IONS BY A SERIES OF NON-CYCLIC SYNTHETIC IONOPHORES
The carrier facilitated transport of lithium picrate was studied using a series of non-cyclic polyethers containing different end groups and chain lengths through Bulk Liquid Membrane (BLM) and Supported Liquid Membrane (SLM) systems. The various membrane supports used are viz. PTFE, cellulose nitrate, and dialysis membrane and onion membrane. The amount of Li+ transported depends upon the stru...
متن کاملInteractive Effects of Acute and Chronic Lithium with Dopamine Receptor Antagonists on Naloxone-Induced Jumping in Morphine-Dependent Mice
In the present study, interactive effects of D1 and D2 dopamine receptors antagonists and different periods of lithium pretreatment on morphine dependence in mice have been investigated. This study was designed to investigate whether the hypothesis that lithium and dopaminergic mechanisms via their effects on phosphoinositide pathways and calcium flux could influence morphine withdrawal respons...
متن کاملEffect of Calcination Temperature and Li / TFA Molar Ratio on Morphology and Phase of Lithium Fluoride Nanoparticles Produced by Fluorolytic Sol-Gel Method
In this research, synthesis of lithium fluoride (LiF) nanoparticles by fluorolytic sol-gel method has been studied. Moreover, the effect of lithium ion to fluorine source molar ratio and calcination temperature on particle size and phase of LiF nanoparticles were investigated. Lithium acetate (C2H3LiO2), trifluoroacetic acid (TFA), ethylene glycol monobutyl ether and oleic acid were used as so...
متن کامل