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Polarographic determination of extraction constants.

作者信息

Dingjan H A, Van Bennekom W P, Bult A

机构信息

Department of Chemical Pharmacy, Subfaculty of Pharmacy, State University of Utrecht, the Netherlands.

出版信息

Pharm Weekbl Sci. 1987 Aug 21;9(4):198-202. doi: 10.1007/BF02029330.

DOI:10.1007/BF02029330
PMID:3658646
Abstract

The extraction constant of three organic compounds containing nitrogen as a picrate ion pair in a water-chloroform system were determined by following polarographically the picrate concentration in the aqueous phase as a function of the added amount of reagent. The extraction constants were also determined spectrophotometrically (via batch extraction). The obtained results are in good agreement. The proposed method is applicable for extraction constants with values between 10(3) and 10(9).

摘要

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本文引用的文献

1
Two-phase titration of organic ammonium ions with lauryl sulphate and methyl yellow as indicator.以十二烷基硫酸盐和甲基黄为指示剂对有机铵离子进行两相滴定。
Talanta. 1974 Sep;21(9):905-18. doi: 10.1016/0039-9140(74)80043-3.
2
PHOTOMETRIC DETERMINATION OF AMINES AND QUATERNARY AMMONIUM COMPOUNDS WITH BROMOTHYMOL BLUE. 4. EXTRACTION CONSTANTS AND CALCULATION OF EXTRACTION CONDITIONS.
Acta Pharm Suec. 1965 Feb;2:13-46.
3
Physical chemical study of the distribution of some amine salts between immiscible solvents.某些胺盐在不互溶溶剂间分布的物理化学研究。
J Pharm Sci. 1961 Nov;50:916-22. doi: 10.1002/jps.2600501107.
4
Determination of amines and quaternary ammonium ions as complexes with picrate. 3. Relations between extraction constants and the nature of the cation and of the organic phase.胺类和季铵离子与苦味酸盐形成配合物的测定。3. 萃取常数与阳离子及有机相性质之间的关系。
Acta Pharm Suec. 1967 Sep;4(4):233-46.
5
Quantitative determinations by ion pair extraction. 6. Principles for determination of extraction constants.离子对萃取法定量测定。6. 萃取常数的测定原理。
Acta Pharm Suec. 1970 Dec;7(6):585-614.
6
Generalized theory for two-phase ion-pair and complexometric titrations. II. Two-phase titrations with side reactions.两相离子对滴定和络合滴定的通用理论。II. 伴有副反应的两相滴定
Pharm Weekbl Sci. 1985 Dec 13;7(6):267-72. doi: 10.1007/BF01959200.
7
Generalized theory for two-phase ion-pair and complexometric titrations. I. Two-phase titrations without side reactions.两相离子对滴定和络合滴定的通用理论。I. 无副反应的两相滴定
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8
Photometric ion-pair titrations in the presence of an immiscible solvent and their application to drug analysis.在不互溶溶剂存在下的光度离子对滴定及其在药物分析中的应用。
Anal Chem. 1979 Jun;51(7):1006-12. doi: 10.1021/ac50043a052.