scholarly journals Gas-Liquid Chromatographic Retention Data for Some isoThiocyanates.

1961 ◽  
Vol 15 ◽  
pp. 1223-1230 ◽  
Author(s):  
Aage Jart ◽  
Knud Engel ◽  
Robert Nilsson ◽  
Gert E. Olsen ◽  
Christian Pedersen ◽  
...  
Keyword(s):  
Chromatographic Retention ◽  
Retention Data ◽  
Liquid Chromatographic

Detection of O,O-Diethyl-O-(2,5-dichlorophenyl) Phosphorothioate and O,O-Diethyl-O-(3,6-dichloro-2-pyridyl) Phosphorothioate in Meat Fat

1976 ◽  
Vol 59 (5) ◽  
pp. 1081-1087
Author(s):  
Barry G Luke ◽  
Colin J Dahl
Keyword(s):  
The Other ◽  
Chromatographic Retention ◽  
Retention Data ◽  
Mass Spectral ◽  
Spectral Evidence ◽  
Liquid Chromatographic

Abstract Two previously unreported organophosphorus residues have been detected in meat fat. The first, O,O-diethyl-O-(2,5-dichlorophenyl) phosphorothioate, apparently results from the debromination of bromophos-ethyl, while the other, O,O-diethyl-O-(3,6-dicliloro-2-pyridyl) phosphorothioate, presumably arises by the monodechlorination of chlorpyriphos. Mass spectral evidence is presented in support of the assigned structures and gas-liquid chromatographic retention data for the residues and their oxygen analogs are provided.

Presentation of Gas-Liquid Chromatographic Retention Data

1958 ◽  
Vol 30 (10) ◽  
pp. 1582-1586 ◽  
Author(s):  
Douglas. Ambrose ◽  
A.I. M. Keulemans ◽  
J H. Purnell
Keyword(s):  
Chromatographic Retention ◽  
Retention Data ◽  
Liquid Chromatographic

Free Energies of Adsorption of Dipeptides and 2,5-Piperazinediones on Silica from Neutral Aqueous Solutions as Estimated from High-Performance Liquid-Chromatographic Retention Data

1994 ◽  
Vol 59 (8) ◽  
pp. 1721-1728 ◽  
Author(s):  
Vladimir A. Basiuk ◽  
Taras Yu. Gromovoy
Keyword(s):  
Aqueous Solutions ◽  
High Performance ◽  
Equilibrium Constants ◽  
High Performance Liquid Chromatographic ◽  
Chromatographic Retention ◽  
Retention Data ◽  
Free Energies ◽  
Sorbate Molecule ◽  
Aliphatic Carbon ◽  
Liquid Chromatographic

The equilibrium constants (K) and free energies (-∆G) of adsorption of dipeptides and their cyclic derivatives, 2,5-piperazinediones, on silica from neutral aqueous solutions were calculated from their HPLC retention data on a silica gel column. For the majority of the dipeptides -∆G values were negative, ranging from -1 170 to 430 J mol-1, and K < 1, thus indicating a very weak adsorption. The 2,5-piperazinediones under study exhibited higher adsorbabilities (-∆G -1 070 + 3 030 J mol-1, K > 1) as compared to the respective dipeptides. The effect of the α-substituent structure on the adsorbability is analyzed. A linear dependence of -∆G on the number of aliphatic carbon atoms in a sorbate molecule was observed for the series of dipeptides and 2,5-piperazinediones derived from bifunctional aliphatic amino acids.

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