Spectrophotometric determination of acidity constants of 2-(2-Thiazolylazo)-Cresol in various water–organic solvent media mixtures using chemometrics methods

2014 ◽  
Vol 120 ◽  
pp. 630-635 ◽  
Author(s):  
Tahereh Momeni-Isfahani ◽  
Ali Niazi
Keyword(s):  
Organic Solvent ◽  
Spectrophotometric Determination ◽  
Acidity Constants ◽  
Organic Solvent Media

The Acidity Constants of Some Pyrimidine Bases in Various Water Organic Solvent Media

2004 ◽  
Vol 94 (11) ◽  
pp. 847-856 ◽  
Author(s):  
Iman T. Ahmed ◽  
Ekram S. Soliman ◽  
Ahmed A. A. Boraei
Keyword(s):  
Organic Solvent ◽  
Acidity Constants ◽  
Organic Solvent Media ◽  
Pyrimidine Bases

scholarly journals With Solvent Extraction Method, and via new Organic Reagent 2-(Benzo thiazolyl azo)-4,5- Diphenyl Imidazole for Spectrophotometric Determination of Copper (II) in different Samples

2014 ◽  
Vol 11 (1) ◽  
pp. 147-157
Author(s):  
Baghdad Science Journal
Keyword(s):  
Organic Solvent ◽  
Spectrophotometric Determination ◽  
Extraction Method ◽  
Complex Structure ◽  
Organic Reagent ◽  
Complexing Agent ◽  
Solvent Extraction Method ◽  
Determination Of Copper ◽  
Synergism Effect

The new organic reagent 2-[Benzo thiazolyl azo]-4,5-diphenyl imidazole was prepared and used as complexing agent for separation and spectrophotometric determination of Cu2+ ion in some samples include plants, soil, water and human blood serum. Initially determined all factors effect on extraction method and the results show optimum pH was (pHex=9), optimum concentration was 40?g/5mLCu2+ and optimum shaking time was (15min.), as well stoichiometry study appears the complex structure was 1:1 Cu2+: BTADPI. Interferences effect of cations were studied. Synergism effect shows MIBK gave increasing in distribution ratio (D). Organic solvent effect appears there is no any linear relation between dielectric constant for organic solvent used and distribution ration (D). Thermodynamically found the reaction was Endothermic reaction, with ?Hex= 0.0131 KJ.mole-1,?Gex=-54.20 KJ.mole-1 ,?Sex= 167.84 J.mole-1.Beer’s law was obeyed over the concentration 1-30?g/5mL, and ?=922.90 Lmol-1.cm-1,with detection limit 1.7×10-5and Sandell’s sensitivity 6.8× 10-7 gcm-2.

Spectrophotometric determination of traces of silicon in water after collection as silicomolybdenum blue on an organic-solvent-soluble membrane filter

1987 ◽  
Vol 59 (5) ◽  
pp. 787-789 ◽  
Author(s):  
Issei. Kasahara ◽  
Ritsuko. Terai ◽  
Yukari. Murai ◽  
Noriko. Hata ◽  
Shigeru. Taguchi ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Spectrophotometric Determination ◽  
Membrane Filter

Spectrophotometric determination of acidity constants by two-rank annihilation factor analysis

2008 ◽  
Vol 607 (2) ◽  
pp. 142-152 ◽  
Author(s):  
Bahram Hemmateenejad ◽  
Abdolkarim Abbaspour ◽  
Homeyra Maghami ◽  
Alireza Foroumadi
Keyword(s):  
Factor Analysis ◽  
Spectrophotometric Determination ◽  
Acidity Constants
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