The Use of 7,7′,8,8′-Tetracyanoquinodimethane for the Spectrophotometric Determination of Some Primary Amines Application to Real Water Samples
Joint Authors
al-Karemy, Najwa M.
al-Subhah, Diya Najm
Source
Journal of Analytical Methods in Chemistry
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-10-07
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
A sensitive, simple, and accurate spectrophotometric method was developed for the quantitative determination of some primary aliphatic and aromatic amines, that is, ethylamine, 1,2-diaminopropane, aniline, p-aminophenol, and benzidine.
The method is based on the interaction of these amines in aqueous medium with 7,7′,8,8′-tetracyanoquinodimethane (TCNQ) reagent in the presence of a buffer solution and surfactant (in the case of aromatic amines) to form charge-transfer complexes measurable at maximum wavelengths ranging between 323 and 511 nm.
Beer’s law is obeyed over the concentration ranges of 0.025 and 3.0 μg/mL and the molar absorptivity is ranged between 8.977 × 103 and 5.8034 × 104 L·mol−1·cm−1 for these amines.
The method was applied for the determination of benzidine in the river, sea, and tap waters.
The TCNQ complexes with the previously mentioned amines were formed in the ratio of 1 : 1 amine : TCNQ, and their stability constants ranged between 8.78 × 104 and 1.844 × 105 L·mol−1.
American Psychological Association (APA)
al-Subhah, Diya Najm& al-Karemy, Najwa M.. 2013. The Use of 7,7′,8,8′-Tetracyanoquinodimethane for the Spectrophotometric Determination of Some Primary Amines Application to Real Water Samples. Journal of Analytical Methods in Chemistry،Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-499326
Modern Language Association (MLA)
al-Subhah, Diya Najm& al-Karemy, Najwa M.. The Use of 7,7′,8,8′-Tetracyanoquinodimethane for the Spectrophotometric Determination of Some Primary Amines Application to Real Water Samples. Journal of Analytical Methods in Chemistry No. 2013 (2013), pp.1-8.
https://search.emarefa.net/detail/BIM-499326
American Medical Association (AMA)
al-Subhah, Diya Najm& al-Karemy, Najwa M.. The Use of 7,7′,8,8′-Tetracyanoquinodimethane for the Spectrophotometric Determination of Some Primary Amines Application to Real Water Samples. Journal of Analytical Methods in Chemistry. 2013. Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-499326
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-499326