The acid dissociation constant of methyl red. A spectrophotometric measurement

1958 ◽  
Vol 35 (10) ◽  
pp. 514 ◽  
Author(s):  
Stephen W. Tobey
Keyword(s):  
Dissociation Constant ◽  
Acid Dissociation ◽  
Acid Dissociation Constant ◽  
Methyl Red ◽  
Spectrophotometric Measurement

scholarly journals Determination of Acid Dissociation Constant of Methyl Red by Multi-Peaks Gaussian Fitting Method Based on UV-Visible Absorption Spectrum

2012 ◽  
Vol 28 (05) ◽  
pp. 1030-1036 ◽  
Author(s):  
ZHANG Jian-Hua ◽  
◽  
LIU Qiong ◽  
CHEN Yu-Miao ◽  
LIU Zhao-Qing ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Dissociation Constant ◽  
Acid Dissociation ◽  
Acid Dissociation Constant ◽  
Methyl Red ◽  
Visible Absorption Spectrum ◽  
Visible Absorption ◽  
Fitting Method ◽  
Uv Visible

Accurate acid dissociation constant (pKa) calculation for the sulfachloropyridazine and similar molecules

2021 ◽  
Vol 27 (8) ◽  
Author(s):  
Fernando Marques Carvalho ◽  
Yuri Alves de Oliveira Só ◽  
Alessandra Sofia Kiametis Wernik ◽  
Mônica de Abreu Silva ◽  
Ricardo Gargano
Keyword(s):  
Dissociation Constant ◽  
Acid Dissociation ◽  
Acid Dissociation Constant ◽  
Pka Calculation

scholarly journals pKa and Ka (Acid dissociation constant)

2020 ◽  
pp. S108-S108
Author(s):  
G Manjooran
Keyword(s):  
Dissociation Constant ◽  
Acid Dissociation ◽  
Acid Dissociation Constant

pKa of a drug is the pH at which 50% of the drug is ionised and 50% is not ionised/unionised. The pKa is specific for each drug and these properties determine how a drug can be administered, the speed of absorption as well as speed of excretion by the kidneys.

Conductometric analysis of the second acid dissociation constant of H2S in highly concentrated aqueous media

1991 ◽  
Vol 318 (1-2) ◽  
pp. 111-129 ◽  
Author(s):  
Stuart Licht ◽  
Kevin Longo ◽  
Dharmasena Peramunage ◽  
Fardad Forouzan
Keyword(s):  
Dissociation Constant ◽  
Aqueous Media ◽  
Acid Dissociation ◽  
Acid Dissociation Constant

Chromatographic Determination of Thermodynamic Acid Dissociation Constants of Tetracycline Antibiotics and Their Epimers

2019 ◽  
Vol 57 (8) ◽  
pp. 745-750
Author(s):  
İlkay Konçe ◽  
Ebru Çubuk Demiralay ◽  
Hülya Yılmaz Ortak
Keyword(s):  
Experimental Data ◽  
Dissociation Constant ◽  
Binary Mixtures ◽  
Dissociation Constants ◽  
Reversed Phase ◽  
Acid Dissociation ◽  
Acid Dissociation Constant ◽  
Chromatography Method ◽  
Ph Values

Abstract The presented study describes the development of reversed-phase liquid chromatography method using a core-shell particle column with a pentafluorophenyl stationary phase for the dissociation constant (pKa) determination of the tetracycline group antibiotics (tetracycline, oxytetracycline, chlortetracycline) and their epimers (4-epitetracycline, 4-epioxytetracycline, 4-epichlortetracycline). The pH values were measured in the acetonitrile (ACN)–water binary mixtures, used as mobile phases, instead of in water and take into account the effect of the activity coefficients. Thermodynamic acid dissociation constant (pKa1) values of studied antibiotics and their epimers were calculated using retention factor (k) at different mobile phase pH values in studied binary mixtures with ACN percentages of 20, 25, 30 and 35% (v/v). Experimental data were analyzed by using an Origin 7.0 program to fit experimental data to the nonlinear expression derived. From calculated pKa1 values, the aqueous pKa values of studied compounds were calculated by different approaches and these values were compared.

The acid dissociation constant of the tris(ethylenediamine)cobalt(III) ion

1972 ◽  
Vol 6 ◽  
pp. 299-302 ◽  
Author(s):  
G. Navon ◽  
R. Panigel ◽  
D. Meyerstein
Keyword(s):  
Dissociation Constant ◽  
Acid Dissociation ◽  
Acid Dissociation Constant
Sign in / Sign up

Export Citation Format

Share Document