A SPECTROPHOTOMETRIC METHOD FOR DETERMINATION OF FORMATION CONSTANTS OF LEAD HALIDE COMPLEXES IN FUSED SODIUM NITRATE-POTASSIUM NITRATE

1962 ◽  
Vol 66 (8) ◽  
pp. 1565-1566 ◽  
Author(s):  
J. D. Van Norman ◽  
R. A. Osteryoung
Keyword(s):  
Sodium Nitrate ◽  
Spectrophotometric Method ◽  
Formation Constants ◽  
Potassium Nitrate ◽  
Halide Complexes ◽  
Lead Halide

Optical Determination of Thermal Conductivity with a Plane Source Technique

1968 ◽  
Vol 23 (1) ◽  
pp. 44-47 ◽  
Author(s):  
Silas E. Gustafsson ◽  
Nils-Olov Halling ◽  
Rolf A. E. Kjellander
Keyword(s):  
Thermal Conductivity ◽  
Steady State ◽  
Thermal Diffusivity ◽  
Sodium Nitrate ◽  
Molten Salts ◽  
Potassium Nitrate ◽  
Plane Source ◽  
Melting Points ◽  
Optical Determination

A recently developed plane source method for non-steady-state measurements of the thermal conductivity and thermal diffusivity of transparent liquids is now being applied to the study of molten salts. In these first measurements sodium nitrate and potassium nitrate have been investigated from their melting points to about 450°C. No temperature dependence of the thermal diffusivity can be established for either of the liquids, whereas the thermal conductivity in both cases increases very slowly with the temperature.A description of the experimental arrangement is included.

scholarly journals Study of Complex Formation Between Iodoquinol (IQ) and Co2+, Mn2+, Cd2+, Pb2+and Zn2+Cations in Binary Aqueous / Non-aqueous Solvent Using Spectrophotometry

2007 ◽  
Vol 4 (4) ◽  
pp. 581-586 ◽  
Author(s):  
A. Nezhadali ◽  
H. A. Hosseini ◽  
P. Langara
Keyword(s):  
Ionic Strength ◽  
Complex Formation ◽  
Stability Constants ◽  
Spectrophotometric Method ◽  
Formation Constants ◽  
The Other ◽  
Aqueous Solvent ◽  
The Stability ◽  
Complexation Reactions

The complexation reactions between iodoquinol and Co2+, Mn2+, Cd2+, Pb2+and Zn2+cations were studied in different DMF/H2O binary mixtures at the ionic strength of 0.1(using NaNO3).The spectrophotometric method was used for the determination of formation constants and the stoichiometries. The stoichiometry of the complexes is established 1:1 by Job's and mole ratio methods. It was found that the stability constants of the complex formed between the ligand (IQ) and the cations in the all cases increase with increasing of the non-aqueous solvent. In the most cases the maximum formation constants between Zn2+ion and IQ were obtained respect to the other cations.

Infrared Determination of Inorganic Nitrates by the Pellet Technique; Infrared Determination of Two Inorganic Nitrates in the Presence of Each other

1970 ◽  
Vol 24 (2) ◽  
pp. 283-287 ◽  
Author(s):  
David E. Chasan ◽  
George Norwitz
Keyword(s):  
Quantitative Determination ◽  
Sodium Nitrate ◽  
Potassium Nitrate ◽  
Potassium Bromide ◽  
Barium Nitrate ◽  
Strontium Nitrate ◽  
Sodium Potassium

The quantitative determination of inorganic nitrates by the pellet technique was investigated. Methods are described for the determination of sodium, potassium, barium, and strontium nitrates. In these methods the nitrate is weighed into a small tared mortar, 300 mg of potassium bromide is added, the pellet is formed, and absorbances are determined at the appropriate peak. The peaks recommended for sodium, potassium, barium, and strontium nitrates are 836, 825, 730, and 737 cm−1, respectively. Methods are also proposed for the determination of two nitrates in the presence of each other. For the analysis of a mixture of sodium nitrate and potassium nitrate, measurements are made for sodium nitrate at 836 cm−1 and for potassium nitrate at 825 cm−1. For the analysis of a mixture of barium nitrate and strontium nitrate, measurements are made for barium nitrate at 730 cm−1 and for strontium nitrate at 737 cm−1. The methods for the determination of two nitrates can be used down to a ratio of 1 to 20. For lesser ratios the errors are rather large. Sulfates do not interfere with any of the procedures.

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