Optical photothermal detection in HPLCстатья

Информация о цитировании статьи получена из Scopus, Web of Science
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] Optical photothermal detection in hplc / M. A. Proskurnin, A. Y. Luk'yanov, S. N. Bendrysheva et al. // Analytical and Bioanalytical Chemistry. — 2003. — Vol. 375, no. 8. — P. 1204–1211. A mode-mismatched parallel dual-beam thermal lens spectrometer with a far-field single-channel detector system was used as a detector in HPLC. An expert estimation of the measurement results was applied to optimize the optical-scheme configuration of the spectrometer to achieve the longest linear calibration range and highest repeatability under chromatographic flow conditions. Chelates with 4-(2-pyridylazo)resorcinol were separated and determined with the limits of detection of nx10(-8)-nx10(-7) mol L-1; the relative standard deviation of measurements was 46%. Xylenol Orange, 4-(2-thiazolylazo)resorcinol, and dithizone were studied as post-column reagents in thermal lens detection in ion chromatography. The limits of detection were nx10(-8)-nx10(-7) mol L-1; the linear calibration ranges were about three orders; the relative standard deviation of measurements was 3-7%. A combined photothermal-refractometric detector for HPLC based on a polarization interferometer is proposed. Metal complexes as 4-(pyridylazo)resorcinol chelates (limits of detection of nx10(-8)-nx10(-7) mol L-1) and sugars (limits of detection of 10-20 ng L-1) were investigated as model substances. Obtained results were compared with results for traditional detectors, which show that photothermal detection has higher sensitivity than photometric and other absorption detectors. [ DOI ]

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