Determination of extraction constants for metal pyrrolidinedithiocarbamates and chloride-mixed metal pyrrolidinedithiocarbamates by substoichiometric extraction

1985 ◽  
Vol 88 (2) ◽  
pp. 313-323 ◽  
Author(s):  
J. M. Lo ◽  
L. H. Shen ◽  
S. J. Yeh
Keyword(s):  
Substoichiometric Extraction ◽  
Mixed Metal ◽  
Extraction Constants

Determination of Procaine and Related Local Anesthetics. I. Partition Chromatographic Separation and Assay of Mixtures of Procaine with Tetracaine and with Propoxycaine

1975 ◽  
Vol 58 (1) ◽  
pp. 88-92
Author(s):  
Thomas D Doyle ◽  
Joseph B Proctor
Keyword(s):  
Local Anesthetics ◽  
Chromatographic Separation ◽  
Ion Pair ◽  
Sodium Bromide ◽  
Chromatographic System ◽  
Extraction Constants ◽  
Bromide Ion ◽  
Selection Of

Abstract Determination of ionization and extraction constants for procaine, tetracaine, and propoxycaine led to selection of a simple partition chromatographic system for separation and assay of mixtures of these anesthetics. A 65% solution of chloroform in isooctane elutes tetracaine or propoxycaine from a pH 4:sodium bromide column; procaine is retained and subsequently eluted by chloroform as the bromide ion-pair. The anesthetics are then determined spectrophotometrically. Results of assay of standard and commercial formulations are presented.

Determination of extraction constants of thallium(I) dithiocarbamates

1983 ◽  
Vol 55 (6) ◽  
pp. 910-913 ◽  
Author(s):  
Govindaraju. Soundararajan ◽  
Masilamani. Subbaiyan
Keyword(s):  
Extraction Constants

Substoichiometric extraction of iron by 2-methyloxine into n-butanol

2006 ◽  
Vol 94 (8) ◽  
Author(s):  
M. Mandal ◽  
D. Pal ◽  
S. Basu
Keyword(s):  
Substoichiometric Extraction

SummaryDetermination of iron(III) by substoichiometric extraction with 2-methyloxine into

Extraction of Selected Organic Bases from Water into Chloroform by Means of the Cobaltacarborane Anion

1998 ◽  
Vol 63 (7) ◽  
pp. 967-976 ◽  
Author(s):  
Oldřich Navrátil ◽  
Zdeněk Skaličan ◽  
Zbyněk Kobliha ◽  
Emil Halámek
Keyword(s):  
Solvent Extraction ◽  
Aqueous Phase ◽  
Organic Nitrogen ◽  
Base Cations ◽  
Photometric Determination ◽  
Nitrogen Base ◽  
Organic Bases ◽  
Quaternary Salts ◽  
Extraction Constants

The cobaltacarborane anion labelled with 60Co was used to study the solvent extraction and stability of its ion associates with a series of organic nitrogen base cations or quaternary salts, some of which are psychoactive. The aqueous phase was 0.1 M HCl, the organic phase was chloroform. The extraction constants of the ion associates were calculated. A method was devised for competitive extraction of ion associates with additional dye anions which are used in the extraction-photometric determination of selected bases.

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