Adsorption isotherms of organic modifiers and the determination of the dead volume in RPLC

1985 ◽  
Vol 20 (7) ◽  
pp. 425-433 ◽  
Author(s):  
P. L. Zhu
Keyword(s):  
Adsorption Isotherms ◽  
Dead Volume ◽  
Organic Modifiers ◽  
The Dead

Determination of the dead volume of columns in reversed phase liquid chromatography

1989 ◽  
Vol 54 (4) ◽  
pp. 953-966 ◽  
Author(s):  
Ivan Vít ◽  
Jan Fähnrich ◽  
Milan Popl
Keyword(s):  
Homologous Series ◽  
Mobile Phase ◽  
Retention Volume ◽  
Reversed Phase ◽  
Dead Volume ◽  
Retention Data ◽  
Reversed Phase Liquid Chromatography ◽  
Phase Liquid ◽  
The Dead

The method for the determination of the dead volume of RPLC columns by measuring the retention volume of phloroglucinol is compared with the method based on the retention data of homologous series of organic solutes and that based on the use of isotopically labelled components of the mobile phase. The use of homologous series is tedious and moreover, satisfactory results are not always obtained. The phloroglucinol method is found well suited to replacing the method based on the use of isotopically labelled components of the mobile phase; poorer results with phloroglucinol are only obtained when the mobile phase contains more than 40% (v/v) water, for the Separon SE polymeric sorbent, and in alkaline medium.

Determination of the degree of adsorption and the heat of adsorption for 1-butylamine and ammonia on NaHY zeolites

1984 ◽  
Vol 49 (12) ◽  
pp. 2739-2743 ◽  
Author(s):  
Miloslav Křivánek ◽  
Pavel Jírů
Keyword(s):  
Lewis Acid ◽  
Adsorption Isotherms ◽  
Heat Of Adsorption ◽  
Brønsted And Lewis Acid

The degree and heat of adsorption of 1-butylamine and ammonia were measured on samples of NaHY zeolites activated at 400-600°C. The adsorption isotherms and calorimetric curves were compared for the two bases, and the amount of Bronsted and Lewis acid centres was determined from the calorimetric curves.

LINURON ADSORPTION AND THE DEGREE OF DECOMPOSITION OF PEATS AS MEASURED BY RUBBED FIBRE CONTENT AND PYROPHOSPHATE INDEX

1976 ◽  
Vol 56 (2) ◽  
pp. 105-109 ◽  
Author(s):  
H. MORITA
Keyword(s):  
Adsorption Isotherms ◽  
Fibre Content ◽  
Extraction Technique ◽  
Adsorption Coefficient ◽  
Column Extraction

Determination of the Freundlich adsorption isotherms for linuron with some peats showed that the adsorption coefficient, K, is closely related to the degree of decomposition as measured by the rubbed fibre content and the pyrophosphate index. The K values indicate that adsorption increases with decomposition. The analyses required for the determination of K were facilitated by the use of a column extraction technique.

The dead volume effect on the elastic moduli measurements using the forced‐oscillation method

2021 ◽  
Author(s):  
V. Mikhaltsevitch ◽  
M. Lebedev ◽  
R. Chavez ◽  
M. Pervukhina ◽  
S. Glubokovskikh ◽  
...  
Keyword(s):  
Elastic Moduli ◽  
Forced Oscillation ◽  
Volume Effect ◽  
Dead Volume ◽  
The Dead ◽  
Oscillation Method

Determination of adsorption isotherms and solute activities from spreading pressure-surface charge data

1977 ◽  
Vol 62 (3) ◽  
pp. 454-460 ◽  
Author(s):  
Sherril D Christian ◽  
Glenn Dryhurst ◽  
Viktor Brabec ◽  
James G Baker
Keyword(s):  
Surface Charge ◽  
Adsorption Isotherms ◽  
Spreading Pressure ◽  
Pressure Surface
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