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Determination of stability constants of copper(I) chelates with 1,10-phenanthroline by thermal lensingстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Pakhomova S.V., Proskurnin M.A., Chernysh V.V., Kononets M.Y., Ivanova E.K.
- Журнал: Journal of Analytical Chemistry
- Том: 56
- Номер: 10
- Год издания: 2001
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 910
- Последняя страница: 917
- DOI: 10.1023/A:1012301210071
- Аннотация: Using investigations of the copper(I)-1,10-phenanthroline system as an example, it is shown that thermal tensing can be used for determining stability constants at a level of concentrations one-two orders of magnitude lower compared to conventional spectrophotometry, with better precision of measurements. The values of stability constants are log beta (2) = 11.7 +/- 0.7 without regard for stepwise chelation, and logK(1) = 5.9 +/- 0.3, logK(2) = 5.4 +/- 0.3, and log beta (2) = 11.3 +/- 0.6 taking into account stepwise chelation. It is shown that, when shifting from microgram to nanogram amounts of reactants in the determination of stability constants by thermal lensing, changes in the kinetic parameters of the reaction studied should be taken into account. The thermal-lens limit of detection of copper(I) is 2 x 10(-8) M; the linear calibration range is 4 x 10(-8)-2 x 10(-5) M (488.0 nm, pump power 120 mW). The data obtained were used for determining copper(I) in the hydrogen sulfide layer of the Baltic Sea.
- Добавил в систему: Проскурнин Михаил Алексеевич