To the Precision of Measuring Concentrations of Nitroxide Radicals in Polymers by EPR Technique
- Авторлар: Chumakova N.1, Ivanova T.1, Golubeva E.1, Kokorin A.2
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Мекемелер:
- Chemistry Department, M. V. Lomonosov Moscow State University
- N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences
- Шығарылым: Том 49, № 5 (2018)
- Беттер: 511-522
- Бөлім: Original Paper
- URL: https://journals.rcsi.science/0937-9347/article/view/248544
- DOI: https://doi.org/10.1007/s00723-018-0992-3
- ID: 248544
Дәйексөз келтіру
Аннотация
The precision of measuring concentrations of nirtoxide radicals in polymeric matrixes using modern electron paramagnetic resonance spectrometer is analyzed. The contributions of the radical nature and concentration, signal-to-noise ratio, and the integration procedure are tested as factors influencing on the precision of the measurement. It has shown that recording spectra with modern EPR spectrometer with possibility of computer analysis of spectra, the contribution of the integration error to the total error strongly depends on the signal-to-noise ratio. If the ratio is < 20, its contribution increases fast with the decrease of this parameter. If this ratio is ≥ 20, the input of the integration error becomes negligible, and the main contribution to the total error of concentration measurements comes from errors of the Q-factor determination, which are usually close to 8–10%.
Авторлар туралы
N. Chumakova
Chemistry Department, M. V. Lomonosov Moscow State University
Email: alex-kokorin@yandex.ru
Ресей, Moscow
T. Ivanova
Chemistry Department, M. V. Lomonosov Moscow State University
Email: alex-kokorin@yandex.ru
Ресей, Moscow
E. Golubeva
Chemistry Department, M. V. Lomonosov Moscow State University
Email: alex-kokorin@yandex.ru
Ресей, Moscow
A. Kokorin
N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences
Хат алмасуға жауапты Автор.
Email: alex-kokorin@yandex.ru
Ресей, Moscow